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Effect of substrate roughness on adhesion and tribological properties of nc-TiAlN/a-Si3N4 nanocomposite coatings deposited by cathodic arc PVD process
Hyderabad, India.
Hyderabad, India.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. Hyderabad, India. (PTW)ORCID iD: 0000-0001-5521-6894
2017 (English)In: Surface Engineering, ISSN 0267-0844, E-ISSN 1743-2944, Vol. 33, no 1, p. 7-19Article in journal (Refereed) Published
Abstract [en]

TiN and Ti–Al–Si–N nanocomposite coatings of the type nc-TiAlN/a-Si3N4 have been prepared by cathodic arc physical vapour deposition process using cylindrical cathodes on high speed steel substrates with different surface roughness values, where the roughness is induced by emery paper method and diamond hand polishing. Fracture toughness studies by indentation method have shown that TiN is tougher than Ti–Al–Si–N nanocomposite coatings. Scratch and pin on disc wear tests have been conducted on the specimens to study the adhesion and tribological behaviour of these coatings respectiely. The wear mode between two mating surfaces is complex, and the wear behaviour can be understood better by studying the progression of surface changes and wear debris. The adhesion pattern of harder nanocomposite coating on smooth substrate surfaces is different from that of tougher TiN coating. Wear volume of these coatings decreases with substrate roughness, but it is found more for nanocomposite than for TiN.

Place, publisher, year, edition, pages
2017. Vol. 33, no 1, p. 7-19
Keyword [en]
TiN, Ti–Al–Si–N, nc-TiAlN/a-Si3N4, Nanocomposite coating, Substrate roughness, Adhesion, Wear
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology; ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-12000DOI: 10.1179/1743294415Y.0000000005OAI: oai:DiVA.org:hv-12000DiVA: diva2:1173979
Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-01-15Bibliographically approved

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Joshi, Shrikant V.

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