CVD diamond coated silicon nitride self-mated systems : tribological behaviour ...

• Author(s): Abreu, C. S. ; Oliveira, F. J. ; Belmonte, M. ; Fernandes, A. J. S. ; Gomes, J. R. ; Silva, R. F.
• Date: 2006
• Persistent ID: http://hdl.handle.net/1822/6124
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): CVD diamond; Silicon nitride; Residual stresses
• Document Type: Article
• Language: English

Description

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.