Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629720 | Journal of the European Ceramic Society | 2012 | 11 Pages |
Abstract
We have used TEM to study the microstructure of friction surface of carbon fibre/carbon-silicon carbide composites brake discs after multi braking stop by using organic pads. A friction surface layer was developed consistently on the top of Si regions of the composites, but inconsistently on that of SiC and C. Inside the layer, amorphous silicon/silicon oxides appeared extensively with various non-metallic and metallic crystallites dispersed inside with sizes ranging from a few nanometers to several microns. A coherent interface between the friction layer and the composite surface was established under the braking conditions, whilst its sustainability varied notably in SiC and C regions. Microcracking near the friction surface appeared in SiC and Cf/C regions largely due to the extensive ductile deformation of SiC and weak interfaces between C and Cf. Material joining mechanisms were discussed to enlighten the friction transfer layer development on the surface of the composite discs.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yuan Wang, Houzheng Wu,