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.
| Original language | English |
|---|---|
| Pages (from-to) | 78-81 |
| Number of pages | 4 |
| Journal | International Journal of Machine Tools and Manufacture |
| Volume | 95 |
| DOIs | |
| Publication status | Published - 9 Jul 2015 |
Keywords
- Amorphization
- C segregation
- Micro-grinding
- Micro-pits
- Surface fracture
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering