Dr Adrian Leyland
BSc PhD MInstP
Senior Lecturer in Surface Technology
Address:
Department of Materials Science and Engineering
Sir Robert Hadfield Building
Mappin Street, Sheffield, S1 3JD
Telephone: +44 (0) 114 222 5486
Fax: +44 (0) 114 222 5943
Email: a.leyland@sheffield.ac.uk
Adrian Leyland is an Honours Graduate of Leeds University (BSc, Materials Science & Engineering, 1985), who joined the Department at the beginning of 2003, having spent the previous 17 years at Hull University, where he obtained his PhD in Plasma Surface Engineering in 1992, from the group of Professor Allan Matthews. He subsequently worked as an Investment Research Fellow in the Research Centre in Surface Engineering at Hull, and as a Lecturer in the Department of Engineering. He is a member of the Editorial Advisory Board of the Elsevier Journal Vacuum, and Treasurer of the Ion and Plasma Surface Interactions (IPSI) Committee in the Applied Physics & Technology division of the Institute of Physics.
Research interests
Dr Leyland´s main research interest is in plasma-based coatings and treatments for surface engineering. Coatings and treatments studied include PVD ceramic, metallic and nanocomposite films and hybrid/duplex substrate pre-treatment by diffusion hardening, plasma electrolysis or interlayering (eg. by electroless plating), to improve coating durability. Practical applications range from tribological (friction and wear), through thermal barriers, to high temperature and aqueous corrosion-control –as well as biomedical, optical and other functional property requirements.
Research topics include:
- PVD metal-alloy nanocomposite and amorphous ‘glassy-metal’ coatings with controlled mechanical properties
- Development of multifunctional PVD ceramic coatings for biomedical applications
- Pre-treatment of light alloys and low-strength ferrous alloys (eg. Austenitic SS) to improve coating load-support and widen tribological applications areas for such materials
- Low-temperature deposition of crystalline oxide films
- Plasma diagnostic studies using OES and mass/energy analysis
Publications
Dr Leyland has published over 120 scientific papers in peer-reviewed Journals and Conference Proceedings and has made written contributions to several well-regarded textbooks in the Surface Engineering field. Selected journal publications are listed below:
- G. Cassar, J.C. Avelar-Batista Wilson, S. Banfield, J. Housden, A. Matthews, A. Leyland, ‘A study of the reciprocating-sliding wear performance of plasma surface treated titanium alloy’, Wear 269 (2010) 60–70.
- CJ Chung, PY Hsieh, CH Hsiao, HI Lin, A Leyland, A Matthews & JL He, ‘Multifunctional arc ion-plated TiO2 photocatalytic coatings with improved wear and corrosion protection’. Surf. Coat. Technol. (2009) 203/12 1689-1693.
- M Audronis, A Leyland, A Matthews, JG Wen & I Petrov, ‘Characterization studies of pulse magnetron sputtered hard ceramic titanium diboride coatings alloyed with silicon. Acta Mater. (2008) 56/16 4172-4182.
- JW Eichler, A Matthews, A Leyland & GL Doll, ‘The influence of coatings on the oil-out performance of rolling bearings’. Surf. Coat. Technol. (2007) 202/4-7 1073-1077.
- MA Monclus, M Baker, C Rebholz, V Stolojan, PN Gibson, A Leyland & A Matthews, ‘Nanostructural studies of PVD TiAlB coatings’. Surf. Interface Analysis (2006) 38/4 731-735.
- J Sun, T Stirner, WE Hagston, A Leyland & A Matthews, ‘A simple transferable interatomic potential model for binary oxides applied to bulk α–Al2O3 and the (0001) α–Al2O3 surface’. J. Crystal Growth (2006) 290 235-240.
- EA Levashov, AS Rogachev, DV Shtansky, BR Senatulin, HE Grigoryan, A Leyland & R Suchentrunk, ‘Self-propagating high-temperature synthesis of cathodes composed of TiCXNY -Ti5Si3 -TiB2’. Galvanotechnik (2005) 96/5 1202-1210.
- LO Snizhko, AL Yerokhin, A Pilkington, NL Gurevina, DO Misnyankin, A Leyland & A Matthews, ‘Anodic processes in plasma electrolytic oxidation of aluminium in alkaline solutions’. Electrochimica Acta (2004) 49 2085-2095.
- A Leyland & A Matthews, ‘Design criteria for wear-resistant nanostructured and glassy-metal coatings’. Surf. Coat. Technol. (2004) 177-178 317-324.
- AD Wilson, A Davison, A Leyland, A Matthews & KS Fancey, ‘Evidence of ionized metal clusters in ion plating discharges’. Appl. Phys. Lett. (2002) 81/8 1405-1407.
- X Nie, A Leyland, A Matthews, JC Jiang & EI Meletis, ‘Effects of solution pH and electrical parameters on hydroxyapatite coatings deposited by a plasma-assisted electrophoresis technique’. J. Biomed. Mater. Res. (2001) 57/4 612-618.
- A Leyland & A Matthews, ‘On the significance of the H/E ratio in wear control: A nanocomposite approach to optimised tribological behaviour’. Wear (2000) 246 1-11.
- AL Yerokhin, X Nie, A Leyland, SJ Dowey, & A Matthews, ‘Review: plasma electrolysis for surface engineering’. Surf. Coat. Technol. (1999) 122 73-93.
- C Rebholz, H Ziegele, A Leyland & A Matthews, ‘Structure, mechanical and tribological properties of nitrogen-containing chromium coatings prepared by reactive magnetron sputtering’. Surf. Coat. Technol. (1999) 115 222-229.
- A Matthews, A Leyland, K Holmberg & H Ronkainen, ‘Design aspects for advanced tribological surface coatings’. Surf. Coat. Technol. (1998) 100-101 1-6.
- M Bin-Sudin, A Leyland, AS James, A Matthews, J Housden & BL Garside, ‘Substrate surface finish effects in duplex coatings of PAPVD TiN and CrN with electroless nickel-phosphorus interlayers’. Surf. Coat. Technol. (1996) 81 215-224.
- W Heinke, A Leyland, A Matthews, G Berg, C Friedrich & E Broszeit, ‘Evaluation of PVD nitride coatings using impact, scratch and Rockwell-C adhesion tests’. Thin Solid Films (1995) 270 431-438.
- A Leyland & A Matthews, ‘Thick Ti/TiN multilayered coatings for abrasive and erosive wear resistance’. Surf. Coat. Technol. (1994) 70 19-25.
- A Leyland, DB Lewis, PR Stevenson & A Matthews, ‘Low temperature plasma diffusion treatment of stainless steels for improved wear resistance’. Surf. Coat. Technol. (1993) 62 608-617.
- A Leyland, KS Fancey & A Matthews, ‘Plasma nitriding in a low-pressure triode discharge to provide improvements in adhesion and load support for wear resistant coatings’. Surface Engineering (1991) 7/3 207-215.
- SJ Bull, DS Rickerby, A Matthews, A Leyland, AR Pace & J Valli, ‘The use of scratch adhesion testing for the determination of interfacial adhesion: the importance of frictional drag’. Surf. Coat. Technol. (1988) 36 503-517.
Research group
Research staff
Dr Aleksey Yerokhin
Dr John W Eichler
Dr Yin Nan Kok
PhD students
Kostas Kanakis
Glenn Cassar
Sarah Banfield
Omoniyi Fasuba
Gary Bywater