Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33474
Title: Amorphization and C segregation based surface generation of Reaction-Bonded SiC/Si composites under micro-grinding
Authors: Zhang, Q
To, S 
Zhao, Q
Guo, B
Keywords: Amorphization
C segregation
Micro-grinding
Micro-pits
Surface fracture
Issue Date: 2015
Publisher: Elsevier Ltd
Source: International journal of machine tools and manufacture, 2015, v. 95, p. 78-81 How to cite?
Journal: International Journal of Machine Tools and Manufacture 
Abstract: Micro-grinding of Reaction-Bonded SiC/Si composites (RB-SiC/Si) were conducted to investigate the surface generation mechanism. The results showed that amorphization occurred for both SiC and Si phases, and C segregation appeared on SiC surface and at the interface of SiC and Si. The surface generation mechanism changed from micro-breaking to smoother surface, but accompanied by formation of many micro-pits at phase boundaries with the decrease of feed rate. It was identified that the material removal mode was closely related to amorphization and C segregation (i.e. amorphization would promote ductile material removal while C segregation would aggravate surface fracture and increase the number of micro-pits). Furthermore, it was found that the distribution of micro-pits corresponded with the random and stochastic properties of diamond grits, and the formation of micro-pits during machining process determined the surface roughness. To explain the mechanism of micro-pits formation, a simple interaction model between diamond grit and workpiece was proposed.
URI: http://hdl.handle.net/10397/33474
ISSN: 0890-6955
DOI: 10.1016/j.ijmachtools.2015.05.007
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