SEDL / STP / STP1278-EB / STP16103S

Friction and Wear Mechanisms on CVD Diamond and PVD TiN Coatings under Fretting Conditions

Mohrbacher, H
Research associate, post-doctoral researcher, and professor, Katholieke Universiteit Leuven, Leuven,

Blanpain, B
Research associate, post-doctoral researcher, and professor, Katholieke Universiteit Leuven, Leuven,

Celis, J-P
Research associate, post-doctoral researcher, and professor, Katholieke Universiteit Leuven, Leuven,

Pages: 18    Published: Jan 1996

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Abstract

Laboratory fretting testing is an appropriate method to investigate the friction and wear behaviors of hard coating materials in vibrating contacts under specified conditions. Such testing can help to select the most suitable coating for a specific application. Furthermore, it can assist in optimizing the coating deposition process. A conceptual framework for modeling laboratory fretting testing is presented together with test equipment and experimental methods for on-line mechanical analysis and off-line material degradation analysis. The application of these concepts is demonstrated for two hard coating types, namely, physical vapor deposition (PVD) TiN and chemical vapor deposition (CVD) diamond coatings. The influence of the fretting conditions on the mechanical contact response as well as on the materials modification induced in the contact is analyzed. The effect of third bodies, tribochemical reactions, and residual stress on the friction and wear behavior of these hard coatings is discussed.