Comparative tribology studies of hard ceramic and composite metal-DLC coatings in sliding friction conditions

A. A. Voevodin; C. Rebholz; A. Matthews

doi:10.1080/10402009508983476

Comparative tribology studies of hard ceramic and composite metal-DLC coatings in sliding friction conditions

A. A. Voevodin^*, C. Rebholz, A. Matthews

^*Corresponding author for this work

Materials Engineering

The University of Hull

Research output: Contribution to journal › Article › peer-review

Abstract

The design of anti-friction coatings able to perform well in different wear conditions without lubricants requires a combination of adequate hardness and toughness, good adhesion, a low friction coefficient and a low wear rate. Recently introduced metal-diamond-like carbon (DLC) coatings can be a major step towards the achievement of such combination. ‘These coatings consist of an amorphous a:CH matrix with the possible incorporation of metal, metal carbide and/or graphite grains. Previous studies of Ti_x%-DLC coatings deposited on Ti-TiN-TiCN-TiC supporting interlayers showed their good protective properties against abrasive, impact and single scratch wear. Here, ball-on-disk experiments are carried out to investigate these coatings in conditions of sliding wear against steel and WC balls. A comparison of the results for Ti_x%-DLC and ceramic TiN, TiCN and CrN coatings shows particularly low friction coefficients (below 0.2) and low normalized wear rales for the Ti_x%-DLC coatings. The results reveal a correlation between the tribological properties of these coatings and the amount of the metal component in their matrix; the Ti_35%-DLC and Ti_20%-DLC are recommended for sliding wear applications.

Original language	English
Pages (from-to)	829-836
Number of pages	8
Journal	Tribology Transactions
Volume	38
Issue number	4
DOIs	https://doi.org/10.1080/10402009508983476
Publication status	Published - 1 Jan 1995

Keywords

Carbon composites
Ceramics
Diamond
Surface films/coatings
Unlubricated wear regime

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10.1080/10402009508983476

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title = "Comparative tribology studies of hard ceramic and composite metal-DLC coatings in sliding friction conditions",

abstract = "The design of anti-friction coatings able to perform well in different wear conditions without lubricants requires a combination of adequate hardness and toughness, good adhesion, a low friction coefficient and a low wear rate. Recently introduced metal-diamond-like carbon (DLC) coatings can be a major step towards the achievement of such combination. {\textquoteleft}These coatings consist of an amorphous a:CH matrix with the possible incorporation of metal, metal carbide and/or graphite grains. Previous studies of Tix%-DLC coatings deposited on Ti-TiN-TiCN-TiC supporting interlayers showed their good protective properties against abrasive, impact and single scratch wear. Here, ball-on-disk experiments are carried out to investigate these coatings in conditions of sliding wear against steel and WC balls. A comparison of the results for Tix%-DLC and ceramic TiN, TiCN and CrN coatings shows particularly low friction coefficients (below 0.2) and low normalized wear rales for the Tix%-DLC coatings. The results reveal a correlation between the tribological properties of these coatings and the amount of the metal component in their matrix; the Ti35%-DLC and Ti20%-DLC are recommended for sliding wear applications.",

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author = "Voevodin, {A. A.} and C. Rebholz and A. Matthews",

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AU - Rebholz, C.

AU - Matthews, A.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The design of anti-friction coatings able to perform well in different wear conditions without lubricants requires a combination of adequate hardness and toughness, good adhesion, a low friction coefficient and a low wear rate. Recently introduced metal-diamond-like carbon (DLC) coatings can be a major step towards the achievement of such combination. ‘These coatings consist of an amorphous a:CH matrix with the possible incorporation of metal, metal carbide and/or graphite grains. Previous studies of Tix%-DLC coatings deposited on Ti-TiN-TiCN-TiC supporting interlayers showed their good protective properties against abrasive, impact and single scratch wear. Here, ball-on-disk experiments are carried out to investigate these coatings in conditions of sliding wear against steel and WC balls. A comparison of the results for Tix%-DLC and ceramic TiN, TiCN and CrN coatings shows particularly low friction coefficients (below 0.2) and low normalized wear rales for the Tix%-DLC coatings. The results reveal a correlation between the tribological properties of these coatings and the amount of the metal component in their matrix; the Ti35%-DLC and Ti20%-DLC are recommended for sliding wear applications.

AB - The design of anti-friction coatings able to perform well in different wear conditions without lubricants requires a combination of adequate hardness and toughness, good adhesion, a low friction coefficient and a low wear rate. Recently introduced metal-diamond-like carbon (DLC) coatings can be a major step towards the achievement of such combination. ‘These coatings consist of an amorphous a:CH matrix with the possible incorporation of metal, metal carbide and/or graphite grains. Previous studies of Tix%-DLC coatings deposited on Ti-TiN-TiCN-TiC supporting interlayers showed their good protective properties against abrasive, impact and single scratch wear. Here, ball-on-disk experiments are carried out to investigate these coatings in conditions of sliding wear against steel and WC balls. A comparison of the results for Tix%-DLC and ceramic TiN, TiCN and CrN coatings shows particularly low friction coefficients (below 0.2) and low normalized wear rales for the Tix%-DLC coatings. The results reveal a correlation between the tribological properties of these coatings and the amount of the metal component in their matrix; the Ti35%-DLC and Ti20%-DLC are recommended for sliding wear applications.

KW - Carbon composites

KW - Ceramics

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KW - Unlubricated wear regime

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Comparative tribology studies of hard ceramic and composite metal-DLC coatings in sliding friction conditions

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Keywords

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