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The role of Ni–Ti–(Cu) interlayers on the mechanical properties and nano-scratch behaviour of solid lubricant W–S–C coatings

The role of Ni–Ti–(Cu) interlayers on the mechanical properties and nano-scratch behaviour of solid lubricant W–S–C coatings
The role of Ni–Ti–(Cu) interlayers on the mechanical properties and nano-scratch behaviour of solid lubricant W–S–C coatings
A self-lubricant W–S–C coating with different Ni–Ti–(Cu) interlayers was fabricated by magnetron sputtering following a three-step process. It consisted of deposition and annealing of Ni–Ti–(Cu) layers with different Cu contents and subsequent deposition of the transition metal dichalcogenide W–S–C coating bonded to the Ni–Ti–(Cu) layer through a gradient Cr-based thin layer. Doping the Ni–Ti interlayer with Cu led to significant microstructural changes which influenced mechanical properties, such as the H/Er ratio and the resistance against plastic deformation. The response of the bilayers, i.e. W–S–C/Ni–Ti–(Cu) coatings, to indentation was affected by the interlayer material. The resistance to adhesion damage of the W–S–C coating was improved by using Ni–Ti–(Cu) interlayers. It was found that interlayers with lower H/Er ratio showed an improved capability to increase the adhesion of the functional top layer
0257-8972
260-269
CALLISTI, MAURO
86e03724-aacc-46d5-bccc-4c7025556667
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
CALLISTI, MAURO
86e03724-aacc-46d5-bccc-4c7025556667
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2

CALLISTI, MAURO and Polcar, T. (2014) The role of Ni–Ti–(Cu) interlayers on the mechanical properties and nano-scratch behaviour of solid lubricant W–S–C coatings. Surface and Coatings Technology, 254, 260-269. (doi:10.1016/j.surfcoat.2014.06.028).

Record type: Article

Abstract

A self-lubricant W–S–C coating with different Ni–Ti–(Cu) interlayers was fabricated by magnetron sputtering following a three-step process. It consisted of deposition and annealing of Ni–Ti–(Cu) layers with different Cu contents and subsequent deposition of the transition metal dichalcogenide W–S–C coating bonded to the Ni–Ti–(Cu) layer through a gradient Cr-based thin layer. Doping the Ni–Ti interlayer with Cu led to significant microstructural changes which influenced mechanical properties, such as the H/Er ratio and the resistance against plastic deformation. The response of the bilayers, i.e. W–S–C/Ni–Ti–(Cu) coatings, to indentation was affected by the interlayer material. The resistance to adhesion damage of the W–S–C coating was improved by using Ni–Ti–(Cu) interlayers. It was found that interlayers with lower H/Er ratio showed an improved capability to increase the adhesion of the functional top layer

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Published date: 15 September 2014
Organisations: nCATS Group

Identifiers

Local EPrints ID: 373221
URI: http://eprints.soton.ac.uk/id/eprint/373221
ISSN: 0257-8972
PURE UUID: 4b1eafa3-2e5b-479e-98e3-365313c5b78c
ORCID for T. Polcar: ORCID iD orcid.org/0000-0002-0863-6287

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Date deposited: 12 Jan 2015 14:21
Last modified: 15 Mar 2024 03:40

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Contributors

Author: MAURO CALLISTI
Author: T. Polcar ORCID iD

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