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Professor Papken Hovsepian

Head of Thin Films Research Centre


Summary

Professor Hovsepian is head of the Thin Films Research Centre and the Nanotechnology Centre for PVD Research at MERI. His major field of endeavour is fundamental research and development of technologies for deposition of application tailored nanoscale multilayer structured PVD coatings using advanced deposition techniques such as Magnetron Sputtering, Cathodic Arc Evaporation and HIPIMS. Examples include corrosion and wear resistant coatings, high temperature oxidation resistant coatings, tribological low friction coatings and coatings for biomedical applications. Professor Hovsepian has published more than 240 scientific papers, has been granted 12 patents. He is a member of EJCPISE, IUVSTA, BVC and a Fellow of the Institute of Physics, UK.

About

Papken Hovsepian joined the Materials and Engineering Research Institute at Sheffield Hallam University in 1997 and took up a Personal Chair in 2004. He has more than 30 years of experience in PVD development and has carried out pioneering work on the development of Cathodic Arc PVD technology and systems leading to industrial implementation of the process.

At present he is head of the Thin Films Research Centre and the Nanotechnology Centre for PVD Research at MERI. His major field of endeavor is fundamental research and development of industrial technologies for deposition of application tailored nanoscale multilayer/superlattice structured PVD coatings using various advanced deposition techniques such as Magnetron Sputtering, Cathodic Arc Evaporation and HIPIMS. Some examples include corrosion and wear resistant coatings, high temperature oxidation resistant coatings, tribological low friction coatings and coatings for biomedical applications. Other fields of interest are coatings for decorative applications (Nb based), and duplex technologies combining plasma nitriding with PVD coatings.

Professor Hovsepian has published more than 240 scientific papers, has been granted 12 patents, 3 product patents and contributed chapters in two books dedicated to the PVD technology.

Professor Hovsepian is involved in partnerships with large number of European, USA and Far East companies, as well as leading research organisations such as Fraunhofer.

He is a co-inventor of the High Power Impulse Magnetron Sputtering (HIPIMS) technology for surface pre-treatment, a Sheffield Hallam University-patented technology licensed to a number of world leading PVD companies: IHI Ionbond, SVS, IHI Hauzer Techno Coatings, CemeCon and The Gillette Company.

He was a member of European Joint Committee on Plasma and Ion Surface Engineering (2000-2016). He is Vice Chair of the Thin Film Division of the International Union for Vacuum Science, Technique and Applications, IUVSTA and member of the British Vacuum Council. He is a Fellow of the Institute of Physics, UK.

Specialist areas of interest

PVD technologies

Teaching

Business, Technology and Enterprise

EC projects: FP7 Project: “CORRAL”, FP6 Project: "INNOVATIAL"; CRAFT Project: “HIPIMS”; CRAFT Project: "ALTICUT"; CRAFT Project: “Colour PVD”; CRAFT Project: “NITRACOTE”; Bright-Euram:”P+CVD”; Bright- Euram, "HYDAM"; Bright- Euram, "NEWCHROME".

EPSRC projects: "Creation of a National Innovation Playground to Widen the Operational Envelope for Tribological PVD Coatings"

Industrial projects with the following companies: BOSCH, PHILIPS, IHI Hauzer Techno Coating, The GILLETTE Company, IHI Ionbond, Zimmer BIOMET, QinetiQ (UK), CUMMINS (UK), MOOG (UK), Rolls Royce (UK), MAHLE (Br).

Research

- FP7 Project, "POEMA";
- Industrial project with IHI Hauzer Techno Coating;
- Industrial project with MAHLE, Br.;
- Industrial project with Rolls Royce.

IHI Hauzer Techno Coating, IHI Ionbond, Zimmer BIOMET, TRUMPF Huettinger, Rolls Royce, SANDVIK, HIDEN, GENCOA. Consortium partners in the above mentioned EC funded projects.

Publications

Journal articles

Arunachalam Sugumaran, A., Purandare, Y., Shukla, K., Khan, I., Ehiasarian, A., & Hovsepian, P. (2021). TiN/NbN nanoscale multilayer coatings deposited by High Power Impulse Magnetron Sputtering to protect medical grade CoCrMo alloys. Coatings, 11 (7). http://doi.org/10.3390/coatings11070867

Shukla, K., Purandare, Y., Sugumaran, A., Ehiasarian, A., Khan, I., & Hovsepian, P. (2021). Correlation between the microstructure and corrosion performance of the HIPIMS nitrided bio-grade CoCrMo alloy. Journal of Alloys and Compounds, 879, 160429. http://doi.org/10.1016/j.jallcom.2021.160429

Ehiasarian, A., Purandare, Y., Sugumaran, A., Hovsepian, P., Hatto, P., & DeBacker, J. (2021). Improving the Quality of Friction Stir Welds in Aluminium Alloys. Coatings, 11 (5). http://doi.org/10.3390/coatings11050539

Arunachalam Sugumaran, A., Shukla, K., Khan, I., Ehiasarian, A., & Hovespian, P. (2020). Dry sliding wear mechanisms of HIPIMS plasma nitrided CoCrMo alloy for medical implant applications. Vacuum. http://doi.org/10.1016/j.vacuum.2020.109994

Bower, R., Loch, D., Ware, E., Berenov, A., Zou, B., Hovsepian, P., ... Petrov, P. (2020). Complimentary Metal-Oxide-Semiconductor compatible deposition of nanoscale transition-metal nitride thin films for plasmonic applications. ACS Applied Materials and Interfaces. http://doi.org/10.1021/acsami.0c10570

Krishnanand, S., Arunachalam Sugumaran, A., Khan, I., Ehiasarian, A., & Hovsepian, P. (2020). Low pressure plasma nitrided CoCrMo alloy utilising HIPIMS discharge for biomedical applications. Journal of The Mechanical Behavior of Biomedical Materials. http://doi.org/10.1016/j.jmbbm.2020.104004

Shukla, K., Purandare, Y., Khan, I., Ehiasarian, A., & Hovsepian, P. (2020). Effect of Nitriding Voltage on the Impact Load Fatigue and Fracture Toughness Behaviour of CoCrMo Alloy Nitrided Utilising a HIPIMS Discharge. Surface and Coatings Technology, 400, 126227. http://doi.org/10.1016/j.surfcoat.2020.126227

Purandare, Y., Robinson, G.L., Ehiasarian, A.P., & Hovsepian, P.E. (2020). Investigation of High Power Impulse Magnetron Sputtering deposited nanoscale CrN/NbN multilayer coating for tribocorrosion resistance. Wear, 203312. http://doi.org/10.1016/j.wear.2020.203312

Sharp, J., Müller, I.C., Mandal, P., Abbas, A., Nord, M., Doye, A., ... Rainforth, W.M. (2019). Characterisation of a High-Power Impulse Magnetron Sputtered C/Mo/W wear resistant coating by transmission electron microscopy. Surface and Coatings Technology, 377, 124853. http://doi.org/10.1016/j.surfcoat.2019.08.007

Hovsepian, P., & Ehiasarian, A. (2019). Six strategies to produce application tailored nanoscale multilayer structured PVD coatings by conventional and High Power Impulse Magnetron Sputtering (HIPIMS). Thin Solid Films, 137409. http://doi.org/10.1016/j.tsf.2019.137409

Ma, D., Harvey, T., Wellman, R., Ehiasarian, A., Hovsepian, P., Arunprabhu, S., ... Wood, R. (2019). Cavitation erosion performance of CrAlYN/CrN nanoscale multilayer coatings deposited on Ti6Al4V by HIPIMS. Journal of Alloys and Compounds, 788, 719-728. http://doi.org/10.1016/j.jallcom.2019.02.238

Biswas, B., Purandare, Y., Khan, I., & Hovsepian, P. (2018). Effect of substrate bias voltage on defect generation and their influence on corrosion and tribological properties of HIPIMS deposited CrN/NbN coatings. Surface and Coatings Technology, 344, 383-393. http://doi.org/10.1016/j.surfcoat.2018.03.009

Hovsepian, P., Ehiasarian, A., Purandare, Y., Mayr, P., Abstoss, K., MosqueraFeijoo, M., ... Trujillo, J. (2018). Novel HIPIMS deposited nanostructured CrN/NbN coatings for environmental protection of steam turbine components. Journal of Alloys and Compounds, 746, 583-593. http://doi.org/10.1016/j.jallcom.2018.02.312

Aguero, A., Lorenza, M.J., Hovsepian, P., Ehiasarian, A., Purandare, Y., & Muelas, R. (2018). Long-term behaviour of Nb and Cr nitrides nanostructured coatings under steam at 650°C. Mechanistic considerations. Journal of Alloys and Compounds, 739, 549-558. http://doi.org/10.1016/j.jallcom.2017.12.288

Biswas, B., Purandare, Y., Arunachalamsugumaran, A., Khan, I., & Hovsepian, P. (2018). Effect of chamber pressure on defect generation and their influence on corrosion and tribological properties of HIPIMS deposited CrN/NbN Coatings. Surface and Coatings Technology, 336, 84-91. http://doi.org/10.1016/j.surfcoat.2017.08.021

Gajewski, W., Ehiasarian, A.P., Żelechowski, M., & Hovsepian, P.E. (2017). Composition and dynamics of high power impulse magnetron discharge at W-Mo-C target in argon atmosphere. Surface and Coatings Technology, 327, 185-191. http://doi.org/10.1016/j.surfcoat.2016.11.006

Biswas, B., Purandare, Y., Arunachalamsugumaran, A., Loch, D., Creasy, S., Khan, I., ... Hovsepian, P. (2017). Defect growth in multilayer chromium nitride/niobium nitride coatings produced by combined high power impulse magnetron sputtering and unbalance magnetron sputtering technique. Thin Solid Films, 636, 558-566. http://doi.org/10.1016/j.tsf.2017.06.027

Arunachalamsugumaran, A., Purandare, Y., Ehiasarian, A., & Hovsepian, P. (2017). Corrosion behaviour of post-deposition polished droplets-embedded arc evaporated and droplets-free HIPIMS/DCMS coatings. Corrosion, 73, 685-693. http://doi.org/10.5006/2064

Müller, I.C., Sharp, J., Rainforth, W.M., Hovsepian, P., & Ehiasarian, A. (2017). Tribological response and characterization of Mo–W doped DLC coating. Wear, 376-37 (Part B), 1622-1629. http://doi.org/10.1016/j.wear.2016.11.036

Ehiasarian Hovsepian, P., Papken Ehiasarian, A., Purandare, Y., Arunachalam Sugumaran, A., Marriott, T., & Khan, I. (2016). Development of superlattice CrNNbN coatings for joint replacements deposited by High Power Impulse Magnetron Sputtering. Journal of Materials Science: Materials in Medicine, 27 (9). http://doi.org/10.1007/s10856-016-5751-0

Hovsepian, P., Ehiasarian, A., Purandare, Y., Biswas, B., Perez, F., Lasanta, M., ... Aguero, A. (2016). Performance of HIPIMS deposited CrN/NbN nanostructured coatings exposed to 650°C in pure steam environment. Materials chemistry and physics, 179, 110-119. http://doi.org/10.1016/j.matchemphys.2016.05.017

Purandare, Y., Ehiasarian, A., & Hovsepian, P. (2016). Target poisoning during CrN deposition by mixed high power impulse magnetron sputtering and unbalanced magnetron sputtering technique. Journal of Vacuum Science & Technology A, 34 (4), 041502-1. http://doi.org/10.1116/1.4950886

Hovsepian, P., Mandal, P., Ehiasarian, A., Safran, G., Tietema, R., & Doerwald, D. (2016). Friction and wear behaviour of Mo − W doped carbon-based coating during boundary lubricated sliding. Applied Surface Science, 366, 260-274. http://doi.org/10.1016/j.apsusc.2016.01.007

Mandal, P., Ehiasarian, A., & Hovsepian, P.E. (2015). Tribological behaviour of Mo–W doped carbon-based coating at ambient condition. Tribology International, 90, 135-147. http://doi.org/10.1016/j.triboint.2015.04.017

Mandal, P., Ehiasarian, A., & Hovsepian, P. (2015). Isothermal and dynamic oxidation behaviour of Mo−W doped carbon-based coating. Applied Surface Science, 353, 1291-1309. http://doi.org/10.1016/j.apsusc.2015.07.057

Dudziak, T., Du, H.L., Datta, P.K., & Hovsepian, P.E. (2015). Air oxidation behaviour of standard PVD and novel HIPIMS coatings at 750°C for 1000 h. Corrosion Engineering Science and Technology, 50 (2), 118-127. http://doi.org/10.1179/1743278214Y.0000000202

Dudziak, T., Du, H.L., Datta, P.K., Ehiasarian, A., Reinhard, C., & Hovsepian, P. (2014). Enhanced sulphidation/oxidation resistance of Ti–45Al–8Nb alloy by multilayered coatings at 850°C for up to 675 h. Corrosion Engineering, Science and Technology, 49 (7), 590-602. http://doi.org/10.1179/1743278213Y.0000000142

Mandal, P., Ehiasarian, A., & Hovsepian, P. (2014). Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating. Tribology International, 77, 186-195. http://doi.org/10.1016/j.triboint.2014.04.007

Hovsepian, P., Ehiasarian, A., & Petrov, I. (2014). Structure evolution and Properties of TiAlCN/VCN Coatings Deposited by Reactive HIPIMS. Surface and Coatings Technology, 257, 38-47. http://doi.org/10.1016/j.surfcoat.2014.07.065

Hovsepian, P., Arunachalamsugumaran, A., Purandare, Y., Loch, D., & Ehiasarian, A. (2014). Effect of the degree of high power impulse magnetron sputtering utilisation on the structure and properties of TiN films. Thin Solid Films, 562, 132-139. http://doi.org/10.1016/j.tsf.2014.04.002

Purandare, Y., Ehiasarian, A., Santana, A., & Hovsepian, P. (2014). ZrN coatings deposited by high power impulse magnetron sputtering and cathodic arc techniques. Journal of Vacuum Science & Technology A, 32 (3). http://doi.org/10.1116/1.4869975

Dudziak, T., Du, H.L., Datta, P.K., Ehiasarian, A.P., Reinhard, C., & Hovsepian, P.E. (2014). Enhanced sulphidation/oxidation resistance of Ti-45Al-8Nb alloy by nanostructured CrAlYN/CrN coatings at 750 °c. Materials and Corrosion, 65 (1), 45-60. http://doi.org/10.1002/maco.201106417

Kamath, G., Ehiasarian, A.P., Purandare, Y., & Hovsepian, P. (2011). Tribological and oxidation behaviour of TiAlCN/VCN nanoscale multilayer coating deposited by the combined HIPIMS/(HIPIMS-UBM) technique. Surface and Coatings Technology, 205 (8-9), 2823. http://doi.org/10.1016/j.surfcoat.2010.10.049

Purandare, Y., Ehiasarian, A., & Hovsepian, P. (2011). Structure and properties of ZrN coatings deposited by high power impulse magnetron sputtering technology. Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, 29 (1), 011004. http://doi.org/10.1116/1.3520640

Braun, R., Lange, A., Hovsepian, P.E., Ehiasarian, A.P., Tietema, R., & Leyens, C. (2011). Oxidation behaviour of TiAlYN/CrN and CrAlYN/CrN nanoscale multilayer coatings with Al 2O 3 topcoat deposited on γ-TiAl alloys. Materials at High Temperatures, 28 (4), 324-335. http://doi.org/10.3184/096034011X13189511864595

Vishnyakov, V.M., Ehiasarian, A.P., Vishnyakov, V.V., Hovsepian, P., & Colligon, J.S. (2011). Amorphous boron containing silicon carbo-nitrides created by ion sputtering. Surface and Coatings Technology, 206 (1), 149-154. http://doi.org/10.1016/j.surfcoat.2011.07.002

Zhou, Z., Rainforth, W.M., Gass, M.H., Bleloch, A., Ehiassarian, A.P., & Hovsepian, P.E. (2011). C/CrC nanocomposite coating deposited by magnetron sputtering at high ion irradiation conditions. Journal of Applied Physics, 110 (7). http://doi.org/10.1063/1.3642996

Hovsepian, P., & Ehiasarian, A. (2010). Novel CrAlYN/CrN nanoscale multilayer PVD coatings produced by the combined high power impulse magnetron sputtering/unbalanced magnetron sputtering technique for environmental protection of gamma TiAl alloys. Surface and Coatings Technology, 204 (16-17), 2702-2708. http://doi.org/10.1016/j.surfcoat.2010.02.021

Kamath, G., Ehiasarian, A.P., & Hovsepian, P. (2010). Properties of TiAlCN/VCN nanoscale multilayer coatings deposited by mixed high-power impulse magnetron sputtering (HiPIMS) and unbalanced magnetron sputtering processes - impact of HiPIMS during coating. IEEE Transactions on Plasma Science, 38 (11), 3062-3070. http://doi.org/10.1109/TPS.2010.2052473

Dearnley, P.A., Neville, A., Turner, S., Scheibe, H.J., Tietema, R., Tap, R., ... Stenbom, B. (2010). Coatings tribology drivers for high density plasma technologies. Surface Engineering, 26 (1-2), 80-96. http://doi.org/10.1179/174329409X451218

Braun, R., Schulz, U., Leyens, C., Hovsepian, P., & Ehiasarian, A. (2010). Oxidation and fatigue behaviour of γ-TiAl coated with HIPIMS CrAlYN/CrN nanoscale multilayer coatings and EB-PVD thermal barrier coatings. International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde), 101 (5), 648-656. http://doi.org/10.3139/146.110323

Purandare, Y., Ehiasarian, A., Stack, M.M., & Hovsepian, P. (2010). CrN/NbN coatings deposited by HIPIMS: A preliminary study of erosion–corrosion performance. Surface and Coatings Technology, 204 (8), 1158-1162. http://doi.org/10.1016/j.surfcoat.2009.11.006

Hovsepian, P., Ehiasarian, A., & Petrov, I. (2010). TiAlCN/VCN nanolayer coatings suitable for machining of Al and Ti alloys deposited by combined high power impulse magnetron sputtering/unbalanced magnetron sputtering. Surface Engineering, 26 (8), 610. http://doi.org/10.1179/026708408X336337

Ross, I.M., Rainforth, W.M., Seabourne, C.R., Scott, A.J., Wang, P., Mendis, B.G., ... Hovsepian, P. (2010). Electron energy loss spectroscopy of nano-scale CrAlYN/CrN–CrAlY(O)N/Cr(O)N multilayer coatings deposited by unbalanced magnetron sputtering. Thin Solid Films, 518 (18), 5121. http://doi.org/10.1016/j.tsf.2010.03.012

Zhou, Z., Rainforth, W.M., Luo, Q., Hovsepian, P., Ojeda, J.J., & Romero-Gonzalez, M.E. (2010). Wear and friction of TiAlN/VN coatings against Al2O3 in airat room and elevated temperatures. Acta Materialia, 58, 2912-2925. http://doi.org/10.1016/j.actamat.2010.01.020

Seabourne, C.R., Ross, I.M., Rainforth, W.M., Scott, A.J., Mendis, B.G., & Hovsepian, P. (2010). EELS and ELNES studies of nano-scale nitride multilayers deposited by unbalanced magnetron sputtering. Journal of Physics: Conference Series, 241, 012046. http://doi.org/10.1088/1742-6596/241/1/012046

Hovsepian, P.E., Ehiasarian, A.P., & Ratayski, U. (2009). CrAlYCN/CrCN nanoscale multilayer PVD coatings deposited by the combined High Power Impulse Magnetron Sputtering/Unbalanced Magnetron Sputtering (HIPIMS/UBM) technology. Surface and coatings technology, 203 (9), 1237-1243. http://doi.org/10.1016/j.surfcoat.2008.10.033

Zhou, Z.X., Ross, I.M., Rainforth, W.M., Cavaleiro, A., Ehiasarian, A.P., & Hovsepian, P.E. (2009). Degradation of a C/CrC PVD coating after annealing in Ar + H-2 at 700 degrees C studied by Raman spectroscopy and transmission electron microscopy. Materials at high temperatures, 26 (2), 169-176. http://doi.org/10.3184/096034009X462971

Braun, R., Braue, W., Frohlich, M., Leyens, C., & Hovsepian, P.E. (2009). Thermally grown oxide scales on gamma-TiAl coated with thermal protection systems. Materials at high temperatures, 26 (3), 305-316. http://doi.org/10.3184/096034009X472493

Safran, G., Reinhard, C., Ehiasarian, A.P., Barna, P.B., Szekely, L., Geszti, O., & Hovsepian, P.E. (2009). Influence of the bias voltage on the structure and mechanical performance of nanoscale multilayer CrAlYN/CrN physical vapor deposition coatings. Journal of Vacuum Science & Technology A, 27 (2), 174-182. http://doi.org/10.1116/1.3065675

Stueber, M., Ziebert, C., Leiste, H., Ulrich, S., Sanz, C., Fuentes, E., ... Hovsepian, P.E. (2009). Wear studies and cutting tests of Ti-Al-N-C nanocomposite coatings in milling operations - technical communication. Machining Science and Technology, 13 (1), 122-141. http://doi.org/10.1080/10910340902782687

Purandare, Y.P., Ehiasarian, A.P., & Hovsepian, P.E. (2008). Deposition of nanoscale multilayer CrN/NbN physical vapor deposition coatings by high power impulse magnetron sputtering. Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 26 (2), 288-296. http://doi.org/10.1116/1.2839855

Hovsepian, P.E., Ehiasarian, A.P., Deeming, A., & Schimpf, C. (2008). Novel TiAlCN/VCN nanoscale multilayer PVD coatings deposited by the combined high-power impulse magnetron sputtering/unbalanced magnetron sputtering (HIPIMS/UBM) technology. Vacuum, 82 (11), 1312-1317. http://doi.org/10.1016/j.vacuum.2008.03.064

Zhou, Z., Rainforth, W.M., Rodenburg, C., Hyatt, N.C., Lewis, D.B., & Hovsepian, P.E. (2007). Oxidation behavior and mechanisms of TiAIN/VN coatings. Metallurgical and Materials Transactions. A.,Physical Metallurgy and Materials Science, 38A (10), 2464-2478. http://doi.org/10.1007/s11661-007-9293-4

Zhou, Z., Rainforth, W.M., Falke, U., Falke, M., Bleloch, A., & Hovsepian, P.E. (2007). On the structure and composition of nanoscale TiAIN/VN multilayers. Philosophical Magazine, 87 (6), 967-978. http://doi.org/10.1080/14786430601019433

Reinhard, C., Ehiasarian, A.P., & Hovsepian, P.E. (2007). CrN/NbN superlattice structured coatings with enhanced corrosion resistance achieved by high power impulse magnetron sputtering interface pre-treatment. Thin Solid Films, 515 (7-8), 3685-3692. http://doi.org/10.1016/j.tsf.2006.11.014

Zhou, Z., Rainforth, W.M., Tan, C.C., Zeng, P., Ojeda, J.J., Romero-Gonzalez, M.E., & Hovsepian, P.E. (2007). The role of the tribofilm and roll-like debris in the wear of nanoscale nitride PVD coatings. Wear, 263, 1328-1334. http://doi.org/10.1016/j.wear.2006.12.059

Hovsepian, P.E., Ehiasarian, A.P., Deeming, A., & Schimpf, C. (2007). VmeCN based nanoscale multilayer PVD coatings deposited by the combined high power impulse magnetron sputtering/unbalanced magnetron sputtering technology. Plasma Processes and Polymers, 4 (SUPPL.1). http://doi.org/10.1002/ppap.200732201

Reinhard, C., Ehiasarian, A.P., & Hovsepian, P.E. (2007). Oxidation behaviour of nanoscale multilayer CrAlYN/CrN coatings deposited by the combined high power impulse magnetronsputtering/unbalanced magnetron sputtering technique. Plasma Processes and Polymers, 4 (SUPPL.1). http://doi.org/10.1002/ppap.200732204

Savisalo, T., Lewis, D.B., Luo, Q., Bolton, M., & Hovsepian, P.E. (2007). Structure of duplex CrN/NbN coatings and their performance against corrosion and wear. Surface and Coatings Technology, 202 (9), 1661-1667. http://doi.org/10.1016/j.surfcoat.2007.07.024

Luo, Q., Schimpf, C., Ehiasarian, A.P., Chen, L., & Hovsepian, P. (2007). Structure and wear mechanisms of nano-structured TiAlCN/VCN multilayer coatings. Plasma Process and Polymers, 4 (51), S916-S920. http://doi.org/10.1002/ppap.200732205

Kok, Y.N., & Hovsepian, P.E. (2006). Resistance of nanoscale multilayer C/Cr coatings against environmental attack. Surface and Coatings Technology, 201 (6), 3596-3605. http://doi.org/10.1016/j.surfcoat.2006.08.109

Savisalo, T., Lewis, D.B., & Hovsepian, P.E. (2006). Microstructure and properties of novel wear and corrosion resistant CrON/NbON nano-scale multilayer coatings. Surface and Coatings Technology, 200 (8), 2731-2737. http://doi.org/10.1016/j.surfcoat.2005.01.107

Lewis, D.B., Creasey, S.J., Wustefeld, C., Ehiasarian, A.P., & Hovsepian, P.E. (2006). The role of the growth defects on the corrosion resistance of CrN/NbN superlattice coatings deposited at low temperatures. Thin Solid Films, 503 (1-2), 143-148. http://doi.org/10.1016/j.tsf.2005.08.375

Huang, Y.Z., Stueber, M., & Hovsepian, P.E. (2006). The significance of carbon on the microstructure of TiAlN-C coatings deposited by reactive magnetron sputtering. Applied Surface Science, 253 (5), 2470-2473. http://doi.org/10.1016/j.apsusc.2006.05.003

Luo, Q., & Hovsepian, P.E. (2006). Transmission electron microscopy and energy dispersive X-ray spectroscopy on the worn surface of nano-structured TiAlN/VN multilayer coating. Thin Solid Films, 497 (1-2), 203-209. http://doi.org/10.1016/j.tsf.2005.10.086

Kok, Y.N., Wen, J.G., Petrov, I., & Hovsepian, P.E. (2006). Influence of ion bombardment on structure and tribological performance of nanoscale multilayer C/Cr PVD coatings. Surface Engineering, 22 (2), 92-98. http://doi.org/10.1179/174329406X98377

Luo, Q., Zhou, Z., Rainforth, W.M., & Hovsepian, P.E. (2006). TEM-EELS study of low-friction superlattice TiAlN/VN coating: the wear mechanisms. Tribology Letters, 24 (2), 171-178. http://doi.org/10.1007/s11249-006-9160-2

Leyens, C., Braun, R., Frohlich, M., & Hovsepian, P.E. (2006). Recent progress in the coating protection of gamma titanium aluminides. JOM, 58 (1), 17-21. http://doi.org/10.1007/s11837-006-0062-4

Purandare, Y.P., Stack, M.M., & Hovsepian, P.E. (2006). Velocity effects on erosion-corrosion of CrN/NbN "superlattice" PVD coatings. Surface and Coatings Technology, 201 (1-2), 361-370. http://doi.org/10.1016/j.surfcoat.2005.11.143

Lewis, D.B., Reitz, D., Wüstefeld, C., Ohser-Wiedemann, R., Oettel, H., Ehiasarian, A.P., & Hovsepian, P.E. (2006). Chromium nitride/niobium nitride nano-scale multilayer coatings deposited at low temperature by the combined cathodic arc/unbalanced magnetron technique. Thin Solid Films, 503 (1-2), 133-142. http://doi.org/10.1016/j.tsf.2005.08.369

Stueber, M., Barna, P.B., Simmonds, M.C., Albers, U., Leiste, H., Ziebert, C., ... Gee, I. (2005). Constitution and microstructure of magnetron sputtered nanocomposite coatings in the system Ti-A1-N-C. Thin Solid Films, 493 (1-2), 104-112. http://doi.org/10.1016/j.tsf.2005.07.290

Hovsepian, P., Luo, Q., Robinson, G., Pittman, M., Howarth, M., Doerwald, D., ... Zeus, T. (2005). TiAlN/VN superlattice structured PVD coatings: A new alternative in machining of aluminium alloys for aerospace and automotive components. Surface and Coatings Technology, 201 (1-2), 265-272. http://doi.org/10.1016/j.surfcoat.2005.11.106

Hovsepian, P., Luo, Q., Robinson, G., Pittman, M., Howarth, M., Doerwald, D., ... Zeus, T. (2005). TiAIN superlattice structured PVD coatings: a new alternative in the machining of aluminium alloys for aerospace and automotive components. Surface and coatings technology, 201 (1-2), 265-272. http://doi.org/10.1016/j.surfcoat.2005.11.106

Hovsepian, P., Kok, Y.N., Ehiasarian, A., & Haasch, R. (2005). Phase separation and formation of the self-organised nanostructure in C/Cr coatings in conditions of high ion irradiation. Surface and coatings technology, 5-6. http://doi.org/10.1016/j.surfcoat.2005.08.095

Hovsepian, P.E., Lewis, D.B., Luo, Q., & Farinotti, A. (2005). Corrosion resistance of CrN/NbN superlattice coatings grown by various physical vapour deposition techniques. Thin Solid Films, 488 (1-2), 1-8. http://doi.org/10.1016/j.tsf.2005.03.016

Hovsepian, P., Lewis, D.B., Luo, Q., Münz, W.D., Mayrhofer, P.H., Mitterer, C., ... Rainforth, W.M. (2005). TiAlN based nanoscale multilayer coatings designed to adapt their tribological properties at elevated temperatures. Thin Solid Films, 485 (1-2), 160-168. http://doi.org/10.1016/j.tsf.2005.03.048

Hovsepian, P., Lewis, D.B., Luo, Q., & Munz, W.D. (2005). TiAIN based nanoscale multilayer coatings designed to adapt their tribological properties at elevated temperatures. Thin solid films, 1-2. http://doi.org/10.1016/j.tsf.2005.03.048

Akid, R., Hovsepian, P., & Kok, Y.N. (2005). Tribocorrosion testing of stainless steel (SS) and PVD coated SS using a modified scanning reference electrode technique. Wear, 259 (7-12), 1472-1481. http://doi.org/10.1016/j.wear.2005.02.049

Luo, Q., Robinson, G., Pittman, M., Howarth, M., Sim, W.M., Stalley, M.R., ... Hovsepian, P. (2005). Performance of nano-structured multilayer PVD coating TiAlN/VN in dry high speed milling of aerospace aluminium 7010-T7651. Surface and Coatings Technology, 200, 123-127. http://doi.org/10.1016/j.surfcoat.2005.02.017

Savisalo, T., Lewis, D.B., Hovsepian, P.E., & Munz, W.D. (2004). Influence of ion bombardment on the properties and microstructure of unbalanced magnetron deposited niobium coatings. Thin Solid Films, 460 (1-2), 94-100. http://doi.org/10.1016/j.tsf.2003.12.150

Luo, Q., Lewis, D.B., Hovsepian, P.E., & Munz, W.D. (2004). Transmission electron microscopy and x-ray diffraction investigation of the microstructure of nanoscale multilayer TiAlN/VN grown by unbalanced magnetron deposition. Journal of Materials Research, 19 (4), 1093-1104. http://doi.org/10.1557/JMR.2004.0143

Ehiasarian, A.P., Hovsepian, P.E., New, R., & Valter, J. (2004). Influence of steering magnetic field on the time-resolved plasma chemistry in cathodic arc discharges. Journal of Physics D: Applied Physics, 37 (15), 2101-2106. http://doi.org/10.1088/0022-3727/37/15/008

Zhou, Z.X., Rainforth, W.M., Rother, B., Ehiasarian, A.P., Hovsepian, P.E., & Munz, W.D. (2004). Elemental distributions and substrate rotation in industrial TiAlN/VN superlattice hard PVD coatings. Surface and Coatings Technology, 183 (2-3), 275-282. http://doi.org/10.1016/j.surfcoat.2003.09.060

Stack, M.M., Purandare, Y.P., & Hovsepian, P. (2004). Impact angle effects on the erosion-corrosion of superlattice CrN/NbN PVD coatings. Surface and coatings technology, 265-272. http://doi.org/10.1016/j.surfcoat.2004.07.075

Ehiasarian, A., Hovsepian, P., Hultman, L., & Helmersson, U. (2004). Comparison of microstructure and mechanical properties of chromium nitride-based coatings deposited by high power impulse magnetron sputtering and by the combined steered cathodic arc/unbalanced magnetron technique. Thin solid films, 457 (2), 270-277. http://doi.org/10.1016/j.tsf.2003.11.113

Lewis, D.B., Luo, Q., Hovsepian, P.E., & Munz, W.D. (2004). Interrelationship between atomic species, bias voltage, texture and microstructure of nano-scale multilayers. Surface and Coatings Technology, 184 (2-3), 225-232. http://doi.org/10.1016/j.surfcoat.2003.11.005

Hovsepian, P.E., Lewis, D.B., Constable, C., Luo, Q., Kok, Y.N., & Munz, W.D. (2003). Combined steered cathodic arc/unbalanced magnetron grown C/Cr nanoscale multilayer coatings for tribological applications. Surface and Coatings Technology, 174, 762-769. http://doi.org/10.1016/S0257-8972(03)00608-X

Münz, W.D., & Hovsepian, P.E. (2002). Properties of niobium-based wear and corrosion resistant hard PVD coatings deposited on various steels. Metallurgia Italiana, 94 (11-12), 25-31.

Leyens, C., Peters, M., Hovsepian, P.E., Lewis, D.B., Luo, Q., & Munz, W.D. (2002). Novel coating systems produced by the combined cathodic arc/unbalanced magnetron sputtering for environmental protection of titanium alloys. Surface and Coatings Technology, 155 (2-3), 103-111. http://doi.org/10.1016/S0257-8972(02)00063-4

Hovsepian, P.E., Constable, C.P., Smith, I.J., & Munz, W.D. (2002). PVD coatings for metal forming applications. Metallurgia, 69 (11), 7.

Wang, H.W., Stack, M.M., Hovsepian, P.E., & Munz, W.D. (2001). Macroparticle induced corrosion for arc bond sputtering CrN/NbN superlattice coatings. Journal of Materials Science Letters, 20 (21), 1995-1997. http://doi.org/10.1023/A:1013111508414

Munz, W.D., Lewis, D.B., Hovsepian, P.E., Schonjahn, C., Ehiasarian, A.P., & Smith, I.J. (2001). Industrial scale manufactured superlattice hard PVD coatings. Surface Engineering, 17 (1), 15-27. http://doi.org/10.1179/026708401101517557

Wang, H.W., Stack, M.M., Lyon, S.B., Hovsepian, P., & Munz, W.D. (2001). Preferential erosive wear of droplet particles for cathodic arc/unbalanced magnetron sputtering CrN/NbN superlattice PVD coatings. Journal of Materials Science Letters, 20 (6), 547-550. http://doi.org/10.1023/A:1010984618231

Wang, H., Stack, M.M., Lyon, S.B., Hovsepian, P.E., & Munz, W.D. (2000). The corrosion behaviour of macroparticle defects in arc bond-sputtered CrN/NbN superlattice coatings. Surface and coatings technology, 126 (2-3), 279-287. http://doi.org/10.1016/S0257-8972(00)00554-5

Wang, H.W., Stack, M.M., Lyon, S.B., Hovsepian, P.E., & Munz, W.D. (2000). Wear associated with growth defects in combined cathodic arc/unbalanced magnetron sputtered CrN/NbN superlattice coatings during erosion in alkaline slurry. Surface and Coatings Technology, 135 (1), 82-90. http://doi.org/10.1016/S0257-8972(00)00913-0

Hovsepian, P.E., Münz, W.D., Medlock, A., & Gregory, G. (1999). Low temperature CrN/NbN superlattice coatings deposited by combined cathodic arc/unbalanced magnetron technique for applications in Cutlery industry. Vide: Science, Technique et Applications, (291 SUPPL.2), 130-132.

Conference papers

Illana, A., Mato, S., Ehiasarian, A., Purandare, Y., Lasanta, M., Miguel, M., ... Trujillo, F. (2017). Substrate finishing and niobium content effects on the high temperature corrosion resistance in steam atmosphere of CrN/NbN superlattice coatings deposited by PVD-HIPIMS. Oxidation of Metals, 87 (3-4), 455-467. http://doi.org/10.1007/s11085-016-9701-5

Sharp, J., Muller, I.C., Mandal, P., Abbas, A., West, G., Rainforth, W.M., ... Hovsepian, P. (2015). Cross sectional TEM analysis of duplex HIPIMS and DC magnetron sputtered Mo and W doped carbon coatings. Journal of Physics: Conference Series, 644, 012011. http://doi.org/10.1088/1742-6596/644/1/012011

Mandal, P., Ehiasarian, A., & Hovsepian, P. (2015). Wear mechanism of Mo−W doped carbon-based coating during boundary lubricated sliding. In SVC TechCon 2015, Santa Clara, USA, 27 April 2015 - 30 April 2015.

Braun, R., Keim, K., Ehiasarian, A.P., & Hovsepian, P.E. (2013). Oxidation protection of γ-TiAl alloys by intermetallic Ti-Al-Cr-Zr coatings. Materials Research Society Symposium Proceedings, 1516, 89-94. http://doi.org/10.1557/opl.2012.1562

Hovsepian, P.E., Kamath, G., Ehiasarian, A.P., Haasch, R., & Petrov, I. (2012). Microstructure, oxidation and tribological properties of TiAlCN/VCN coatings deposited by reactive HIPIMS. IOP Conference Series: Materials Science and Engineering, 39 (1). http://doi.org/10.1088/1757-899X/39/1/012011

Zhou, Z., Ross, I.M., Ma, L., Rainforth, W.M., Ehiasarian, A., & Hovsepian, P. (2011). Wear of hydrogen free C/Cr PVD coating against Al2O3 at room temperature. Wear, 271 (9-10), 2150-2156. http://doi.org/10.1016/j.wear.2011.02.028

Ross, I.M., Zhou, Z., Rainforth, W.M., Bleloch, A., Ehiasarian, A., & Hovsepian, P. (2010). EELS and STEM analysis of metal nitride/substrate interfaces. Journal of Physics: Conference Series, 241, 012102. http://doi.org/10.1088/1742-6596/241/1/012102

Zhou, Z., Ross, I.M., Rainforth, W.M., & Hovsepian, P. (2010). Tracing C changes in a C/CrC PVD coating using Raman spectroscopy and EELS. Journal of Physics: Conference Series, 241, 012108. http://doi.org/10.1088/1742-6596/241/1/012108

Kamath, G., Ehiasarian, A., Purandare, Y., & Hovsepian, P. (2010). Microstructural and Oxidative Mechanical Wear Study on TiAlCN/VCN. 53rd Annual Technical Conference Proceedings.

Hovsepian, P.E., Ehiasarian, A.P., Purandare, Y.P., Braun, R., & Ross, I.M. (2009). Effect of High Ion Irradiation on the Structure, Properties and High Temperature Tribology of Nanoscale CrAlYN/CrN Multilayer Coating Deposited by HIPIMS-HIPIMS Technique. Plasma Processes and Polymers, 6, S118-S123. http://doi.org/10.1002/ppap.200930412

Walker, J.C., Ross, I.M., Reinhard, C., Rainforth, W.M., & Hovsepian, P.E. (2009). High temperature tribological performance of CrAlYN/CrN nanoscale multilayer coatings deposited on gamma-TiAl. Wear, 267 (5-8), 965-975. http://doi.org/10.1016/j.wear.2009.01.039

Ross, I.M., Rainforth, W.M., Zhou, Z., Walker, J.C., Reinhard, C., Ehiasarian, A.P., ... Leyens, C. (2008). Oxidation characteristics of γ-TiAl-8Nb coated with a CrAlYN/CrN nanoscale multilayer coating. TMS Annual Meeting, 315-322.

Braun, R., Müßener, D., Leyens, C., Hovsepian, P.E., Reinhard, C., & Ehiasarian, A.P. (2008). Environmental protection of γ-TiAl alloys coated with CrAlYN/CrN nanoscale multilayer coatings and EB-PVD thermal barrier coatings. TMS Annual Meeting, 341-348.

Ross, I.M., Rainforth, W.M., Zhou, Z., Walker, J.C., Reinhard, C., Ehiasarian, A.P., ... Braun, R. (2008). Oxidation performance of nano-scale multilayer coatings on γ-TiAl. Journal of Physics: Conference Series, 126. http://doi.org/10.1088/1742-6596/126/1/012022

Hovsepian, P.E., Reinhard, C., & Ehiasarian, A.P. (2006). CrAlYN/CrN superlattice coatings deposited by the combined high power impulse magnetron sputtering/unbalanced magnetron sputtering technique. Surface and Coatings Technology, 201 (7), 4105-4110. http://doi.org/10.1016/j.surfcoat.2006.08.027

Stueber, M., Albers, U., Leiste, H., Ulrich, S., Holleck, H., Barna, P.B., ... Gee, I. (2006). Multifunctional nanolaminated PVD coatings in the system Ti-Al-N-C by combination of metastable fcc phases and nanocomposite microstructures. Surface and Coatings Technology, 200 (22-23), 6162-6171. http://doi.org/10.1016/j.surfcoat.2005.11.012

Zhou, Z., Calvert, C.C., Rainforth, W.M., Luo, Q., Cheng, L., & Hovsepian, P. (2006). Investigating worn surfaces of nanoscale TiAlN/VN multilayer coating using FIB and TEM. Journal of Physics: Conference Series, 26 (1), 95-98. http://doi.org/10.1088/1742-6596/26/1/022

Purandare, Y.P., Stack, M.M., & Hovsepian, P.E. (2005). A study of the erosion-corrosion of PVD CrN/NbN superlattice coatings in aqueous slurries. Wear, 259 (1-6), 256-262. http://doi.org/10.1016/j.wear.2005.01.047

Kok, Y.N., Hovsepian, P.E., Haasch, R., & Petrov, I. (2005). Raman spectroscopy study of C/Cr coatings deposited by the combined. Surface and Coatings Technology, 200 (1-4), 1117-1122. http://doi.org/10.1016/j.surfcoat.2005.02.023

Ehiasarian, A.P., Hovsepian, P.E., Lattemann, M., Böhlmark, J., & Helmersson, U. (2005). High Power Impulse Magnetron Sputtering (HIPIMS) pre-treatment for the deposition of hard coatings. Proceedings, Annual Technical Conference - Society of Vacuum Coaters, 480-484.

Eerden, M., Tietema, R., Krug, T., & Hovsepian, P.E. (2005). Current progress in large scale manufacturing of PVD coatings for decorative applications. Proceedings, Annual Technical Conference - Society of Vacuum Coaters, 575-579.

Hovsepian, P.E., Kok, Y.N., Ehiasarian, A.P., Haasch, R., Wen, J.G., & Petrov, I. (2005). Phase separation and formation of the self-organised layered nanostructure in C/Cr coatings in conditions of high ion irradiation. Surface and Coatings Technology, 200 (5-6), 1572-1579. http://doi.org/10.1016/j.surfcoat.2005.08.095

Ehiasarian, A., Hovsepian, P., New, R., & Valter, J. (2005). Influence of steering magnetic field on the time-resolved plasma chemistry in cathodic arc discharges. In Proceedings - XXIth International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV, September 27, 2004 - October 1, 2004, Yalta, Ukraine, (pp. 521-524). Institute of Electrical and Electronics Engineers Inc: http://doi.org/10.1109/DEIV.2004.1422664

Fenker, M., Jackson, N., Spolding, M., Nicole, P., Schonhut, K., Gregory, G., ... Munz, W.D. (2004). Corrosion performance of PVD-coated and anodised materials for the decorative market. Surface and Coatings Technology, 188, 466-472. http://doi.org/10.1016/j.surfcoat.2004.08.054

Zhou, Z., Rainforth, W.M., Hovsepian, P.E., & Munz, W.D. (2004). Oxidation of nanoscale TiAIN/VN multilayer coatings. In McVitie, S., & McComb, D. (Eds.) Electron Microscopy and Analysis 2003, (pp. 413-416). Institute of Physics

Hovsepian, P.E., Kok, Y.N., Ehiasarian, A.P., Erdemir, A., Wen, J.G., & Petrov, I. (2004). Structure and tribological behaviour of nanoscale multilayer C/Cr coatings deposited by the combined steered cathodic arc/unbalanced magnetron sputtering technique. Thin Solid Films, 447, 7-13. http://doi.org/10.1016/j.tsf.2003.09.009

Mayrhofer, P.H., Hovsepian, P.E., Mitterer, C., & Munz, W.D. (2004). Calorimetric evidence for frictional self-adaptation of TiAlN/VN superlattice coatings. Surface and Coatings Technology, 177, 341-347. http://doi.org/10.1016/j.surfcoat.2003.09.024

Zhou, Z., Rainforth, W.M., Lewis, D.B., Creasy, S., Forsyth, J.J., Clegg, E., ... Munz, W.D. (2004). Oxidation behaviour of nanoscale TiAlN/VN multilayer coatings. Surface and Coatings Technology, 177, 198-203. http://doi.org/10.1016/j.surfcoat.2003.09.031

Stack, M.M., Purandare, Y., & Hovsepian, P. (2004). Impact angle effects on the erosion-corrosion of superlattice CrN/NbN PVD coatings. Surface and Coatings Technology, 188-189 (1-3 SPEC.ISS), 556-565. http://doi.org/10.1016/j.surfcoat.2004.07.075

Kok, Y.N., Hovsepian, P.E., Luo, Q., Lewis, D.B., Wen, J.G., & Petrov, I. (2004). Influence of the bias voltage on the structure and the tribological performance of nanoscale multilayer C/Cr PVD coatings. Thin Solid Films, 475 (1-2), 219-226. http://doi.org/10.1016/j.tsf.2004.08.042

Doerwald, D., Krug, T., Tietema, R., Sim, W.M., Luo, Q., & Hovsepian, P. (2004). New tool coatings for light metal cutting. Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment, 25 (5), 832-836. http://caod.oriprobe.com/articles/7796475/New_Tool_Coatings_for_Light_Metal_Cutting.htm

Luo, Q., Hovsepian, P.E., Lewis, D.B., Munz, W.D., Kok, Y.N., Cockrem, J., ... Farinotti, A. (2004). Tribological properties of unbalanced magnetron sputtered nano-scale multilayer coatings TiAlN/VN and TiAlCrYN deposited on plasma nitrided steels. Surface and coatings technology, 193 (1-3), 39-45. http://doi.org/10.1016/j.surfcoat.2004.07.058

Leyens, C., Braun, R., Hovsepian, P.E., & Münz, W.D. (2003). Environmental protection of gamma titanium aluminides. Gamma Titanium Aluminides 2003, 551-557.

Hovsepian, P.E., Ehiasarian, A.P., Münz, W.D., Lewis, D.B., & Thompson, G. (2003). Performance of High-Precision Knife Blades Treated by Plasma Nitriding and PVD Coating. Proceedings, Annual Technical Conference - Society of Vacuum Coaters, 61-66.

Ehiasarian, A.P., Hovsepian, P.E., New, R., & Münz, W.D. (2003). Influence of Steering Magnetic Field on the Composition and Intensity of the Ion Flux Generated in Arc Discharges. Proceedings, Annual Technical Conference - Society of Vacuum Coaters, 437-441.

Lewis, D.B., Creasey, S.J., Zhou, Z., Forsyth, J.J., Ehiasarian, A.P., Hovsepian, P.E., ... Munz, W.D. (2003). The effect of (Ti + Al): V ratio on the structure and oxidation behaviour of TiAlN/VN nano-scale multilayer coatings. Surface and coatings technology, 177, 252-259. http://doi.org/10.1016/j.surfcoat.2003.09.041

Hovsepian, P.E., & Munz, W.D. (2002). Recent progress in large-scale production of nanoscale multilayer/superlattice hard coatings. Vacuum, 69 (1-3), 27-36. http://doi.org/10.1016/S0042-207X(02)00305-6

Luo, Q., Leyens, C., Hovsepian, P.E., Lewis, D.B., Constable, C.P., & Munz, W.D. (2001). Oxidation mechanism of PVD TiAlCrYN coating observed by analytical TEM. In Aindow, M., & Kiely, C.J. (Eds.) Electron Microscopy and Analysis 2001, (pp. 369-372). Institute of Physics

Hovsepian, P.E., Münz, W.D., Schlömer, B., Gregory, G., & Smith, I.J. (2001). PVD CrN/NbN superlattice coatings to protect components used in the textile industry. Proceedings, Annual Technical Conference - Society of Vacuum Coaters, 72-77.

Hovsepian, P.E., Munz, W.D., Medlock, A., & Gregory, G. (2000). Combined cathodic arc/unbalanced magnetron grown CrN/NbN superlattice coatings for applications in the cutlery industry. Surface and Coatings Technology, 133, 508-516. http://doi.org/10.1016/S0257-8972(00)00921-X

Constable, C.P., Yarwood, J., Hovsepian, P.E., Donohue, L.A., Lewis, D.B., & Munz, W.D. (2000). Structural determination of wear debris generated from sliding wear tests on ceramic coatings using Raman microscopy. Journal of Vacuum Science and Technology A, 18 (4), 1681-1689. http://doi.org/10.1116/1.582407

Munz, W.D., Donohue, L.A., & Hovsepian, P.E. (2000). Properties of various large-scale fabricated TiAlN- and CrN-based superlattice coatings grown by combined cathodic arc-unbalanced magnetron sputter deposition. Surface and Coatings Technology, 125 (1-3), 269-277. http://doi.org/10.1016/S0257-8972(99)00572-1

Hovsepian, P.E., Lewis, D.B., & Munz, W.D. (2000). Recent progress in large scale manufacturing of multilayer/superlattice hard coatings. Surface and Coatings Technology, 133-4, 166-175. http://doi.org/10.1016/S0257-8972(00)00959-2

Hovsepian, P.E., Lewis, D.B., Munz, W.D., Lyon, S.B., & Tomlinson, M. (1999). Combined cathodic arc/unbalanced magnetron grown CrN/NbN superlattice coatings for corrosion resistant applications. Surface and Coatings Technology, 120, 535-541. http://doi.org/10.1016/S0257-8972(99)00439-9

Tomlinson, M., Lyon, S.B., Hovsepian, P.E., & Munz, W.D. (1999). Corrosion performance of CrN/NbN superlattice coatings deposited by the combined cathodic arc unbalanced magnetron technique. Vacuum, 53 (1-2), 117-121. http://doi.org/10.1016/S0042-207X(98)00405-9

Hovsepian, P.E., Lewis, D.B., Muunz, W.D., Rouzaud, A., & Juliet, P. (1999). Chromium nitride/niobium nitride superlattice coatings deposited by combined cathodic-arc/unbalanced magnetron technique. Surface and Coatings Technology, 116, 727-734. http://doi.org/10.1016/S0257-8972(99)00182-6

Hovsepian, P., & Popov, D. (1994). Cathode poisoning during reactive arc evaporation of titanium in nitrogen atmosphere. Vacuum, 45 (5), 603-607. http://doi.org/10.1016/0042-207X(94)90261-5

Book chapters

Hovsepian, P., & Münz, W.-.D. (2006). Synthesis, Structure, and Applications of Nanoscale Multilayer/Superlattice Structured PVD Coatings. In Cavaleiro, A., & De Hosson, J.T.M. (Eds.) Nanostructured Coatings. (pp. 555-644). Springer New York: http://doi.org/10.1007/0-387-48756-5_14

Theses / Dissertations

Shukla, K.S.P. (2021). Nitriding of medical grade CoCrMo alloys using HIPIMS discharge. (Doctoral thesis). Supervised by Hovsepian, P., & Khan, I. http://doi.org/10.7190/shu-thesis-00379

Biswas, B. (2017). Growth defects in CrN/NbN coatings deposited by HIPIMS/UBM techniques. (Doctoral thesis). Supervised by Hovsepian, P. http://doi.org/10.7190/shu-thesis-00055

Loch, D.A.L. (2015). Development of an inductively coupled impulse sputtering source for coating deposition. (Doctoral thesis). Supervised by Ehiasarian, A., & Hovsepian, P.

Mandal, P. (2015). Tribological study of novel metal-doped carbon-based coatings with enhanced thermal stability. (Doctoral thesis). Supervised by Hovsepian, P., & Ehiasarian, A.

Hofmann, D. (2014). Si-DLC coatings optimized for low wear and low friction applications. (Doctoral thesis). Supervised by Hovsepian, P.

Hecimovic, A. (2009). High power impulse magnetron sputtering (HIPIMS) : Fundamental plasma studies and material synthesis. (Doctoral thesis). Supervised by Ehiasaraian, A., & Hovsepian, P.

Kok, Y.N. (2005). Nanoscale multilayer Me-graphite coatings grown by combined steered cathodic arc/unbalanced magnetron sputtering. (Doctoral thesis). Supervised by Hovsepian, P., & Akid, R.

Posters

Shukla, K., Purandare, Y., Loch, D., Sugumaran, A., Kahn, I., Ehiasarian, A., & Hovsepian, P. (2020). Low-Pressure Plasma Nitriding Of Medical Grade Alloy Using HIPIMS Discharge. Presented at: I2RI Winter Poster Session, Virtual, 2020

Other publications

Hovsepian, P. (n.d.). "ALTICUT" "Revolutionary New Steels, Coated and Designed for Cutting Tools to Machine Al and Ti Alloys used in the Automotive and Aerospace Industry" GRD1-2001-40514.

Other activities

Membership in Professional Bodies
  • Member of the Society of Vacuum Coaters, (SVC), USA, 1995- Present.
  • Member of the American Vacuum Society (AVS), 1999-Present.
  • Member of the Institute of Physics, (IoP), 2005-Present.
  • Member of the Plasma Surface Interaction Committee, Institute of Physics 2005-2008.
  • Member of the Yorkshire Surface Engineering Group Steering Committee, 2006-2010.
  • Vice- Chair of the Thin Film Division Committee of the International Union for Vacuum Science, Technique and Applications, IUVSTA, 2014-Present.
  • Member of the European Joint Committee on Plasma and Ion Surface Engineering, representing UK, (2008-2016).

Awards

1. SVC Mentor Award 2017: "For his valuable contributions in the development and industrialisation of High Power Impulse Magnetron Sputtering, (HIPIMS) technology", 2017.

2. Award: Fellow of the Institute of Physics, 2014.

3. Award for Innovation “ PVD Coating Development on Cutting Tools” with Hydra Clarkson Int. Ltd., Yorkshire Forward Centres of Industrial Collaboration, 2006.

4. R.F. Bunshah Award, AVS Advanced Surface Engineering Division, for best paper in Symposium E at the International Conference of Metallurgical Coatings and Thin Films, ICMCTF 2004, San Diego CA.

5. A scholarship from the United States Agency for International Development (USAID) for “Training in Management and Marketing of  Vacuum Coating Centres and Vacuum Coating Techniques and Machinery, EMED, Exchange Visitor Programme No: G-2-0263, April 1995, USA.

6. Gold Medal, Presented at the International Technical Fair in Plovdiv, Bulgaria by the Bulgarian Industrial and Trade Association for the development: “Three Coil Steered Arc Self Controlled Evaporator for PVD Coating Deposition”, 1989.

7. A fellowship in Surface Analysis Techniques at LEYBOLD AG Cologne, Germany, awarded by the United Nations Industrial Development Organisation (UNIDO) 1989.

8. Diploma of the Bulgarian Ministry of Health, awarded at the Second National Competition of the Inventors, for the development: Implementation of a novel PVD technology for TiN coating deposition on dental prosthesis at the dental clinics in Rousse region, Bulgaria, Plovdiv, 1987.

9. “Inventor” title award of the Bulgarian Ministry of Health, under the act 57 of the National Inventors Law. Ministry of Health.  Reg. No: RD 2665, 17.09.1987, Sofia, Bulgaria.

10. Young Scientists Award “Golden Hands” Presented at the International Technical Fair in Plovdiv, Bulgaria for the development “Rotating magnetron system for deposition of multilayer PVD optical coatings”, 1986.

11. Gold Medal, Presented at the International Technical Fair in Plovdiv, Bulgaria by the Bulgarian Industrial and Trade Association for the development: “Industrial system for PVD coating deposition utilising Cathodic Arc Evaporation, “TITAN”", 1984.

12. Young Scientist Award “Golden Hands” Presented at the International Technical Fair in Plovdiv, Bulgaria for the development: "Technology and inline system for coating deposition on wires in vacuum” 1979. 

Prizes

1. Runners up prize at Bodycote International paper prize competition, 20th March 2005, Toronto, Canada, for the paper:  Y. N. Kok, J.G. Wen, I. Petrov, P.Eh. Hovsepian, "Influence of Bias Voltage on the Structure and Tribological Performance of Nanoscale Multilayer C/Cr PVD Coatings"

2. Runners up prize at Bodycote International paper prize competition, 20th March 2005, Toronto, Canada, for the paper:  Y. Purandare, M.M. Stack, P. Eh. Hovsepian, "Mechanisms of Erosion-Corrosion of Superlattice PVD CrN/NbN Coatings",

3. Award to the best poster on PROCESSING in the Advances in Materials and Processing Technologies AMPT 2015, Madrid, Spain.



Postgraduate supervision

Current Students:

- 2018 - ongoing: Krishnan - '' In situ plasma nitriding and deposition of nanostructured coating utilizing HIPIMS discharge for medical devices ''


Past Students: 

- 2014-2017: Barnali Biswas, "Wear and failure mechanism of various nanostructured coating deposited on medical devices using HIPIMS."
- 2011-2014: Dieter Erich Hofmann, "Si:DLC Coatings Optimised for Low Wear and Low Friction Applications"
- 2011-2014: Paranjayee Mandal, "Novel Metal Doped Carbon Based Tribological Coatings with Enhanced Thermal Stability".
- 2010-2013: Arunprhabu Arunalchalam Sugumaran, "Development of Nanostructured PVD Coatings for Total Knee Replacement Joints using HIPIMS".
- 2008-2011: Ganesh Kamath, "Microstructure Mechanical and Tribological Properties of Nanostructured TiAICN/VCN Coatings Produced by HIPIMS."
- 2004-2008: Tuukka Savisalo, "Improving the Tribological Properties of CrN/NbN Superlattice PVD Coatings".
- 2004-2007: Christina Reinhard, "Development of new generation Ti-free nanoscale multilayer/superlattice structured PVD coatings involving Cr, Al and Y to protect gamma Ti-alloys against environmental attack".
- 2002-2005: Yin Nan Kok, "Nanoscale Multilayer Me-C Coatings Grown by Combined Steered Cathodic Arc/ Unbalanced Magnetron Sputtering"

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