CVD diamond coated silicon nitride self-mated systems : tribological behaviour under high loads

Friction and wear behaviour of self-mated chemical vapour deposited (CVD) diamond films coating silicon nitride ceramics (Si3N4) were investigated in ambient atmosphere. The tribological tests were conducted in a reciprocal motion ball-on-flat type tribometer under applied normal loads up to 80 N (~10...

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Bibliographic Details
Main Author: Abreu, C. S. (author)
Other Authors: Oliveira, F. J. (author), Belmonte, M. (author), Fernandes, A. J. S. (author), Gomes, J. R. (author), Silva, R. F. (author)
Format: article
Language:eng
Published: 2006
Subjects:
CVD diamond
Silicon nitride
Residual stresses
Science & Technology
Online Access:http://hdl.handle.net/1822/6124
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/6124
Description
Summary:Friction and wear behaviour of self-mated chemical vapour deposited (CVD) diamond films coating silicon nitride ceramics (Si3N4) were investigated in ambient atmosphere. The tribological tests were conducted in a reciprocal motion ball-on-flat type tribometer under applied normal loads up to 80 N (~10 GPa). Several characterisation techniques - including scanning electron microscopy (SEM), atomic force microscopy (AFM) and micro-Raman studies - were used in order to assess the quality, stress state and wear resistance of the coatings. In addition, a novel method is presented to estimate the wear coefficient of the diamond coated flat specimens from AFM and optical microscopy (OM) observations of the wear tracks.

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