Study on Surface Integrity in Milling of C/SiC Composite.

The milling experiments of C/SiC composite with PCD tools are conducted, and surface formation mechanism is analyzed by observing surface/subsurface damages. The effect of milling parameters on surface topography and surface roughness is discussed with the analysis of cutting force. The results show that C/SiC composite is removed in the mechanism of brittle fracture. Laminated fracture, pull-out and fracture in bundle of carbon fiber can be observed on the machined surface. The effect of milling parameters on surface roughness is basically the same with that on surface topography. The higher cutting speed can improve the surface quality, the bigger axial depth of cut will worsen the surface quality and the feed per tooth has no significant influence on surface quality. [ABSTRACT FROM AUTHOR]