Abstract: To investigate the grinding surface quality of unidirection carbon fiber-reinforced ceramic matrix composites(C_f/SiC)， the orthogonal experiments were carried out by using resin-bonded diamond grinding wheel. In order to achieve the influence order of grinding wheel linear speed， grinding depth and feed speed on grinding surface quality， range analysis was adopted in this paper. The results indicate that: the grinding depth has maximum impact on the machining surface roughness; as the raises of grinding depth， the grinding surface roughness increases; as the raises of grinding wheel linear speed， the grinding surface roughness decreases; as the raises of feed speed， the grinding surface roughness increases. According to the result of orthogonal experiments， the best combination of grinding parameters was achieved. Based on the experiment results and surface topography， the grinding mechanisms of unidirection C_f/SiC were further analyzed， which supplies some useful technical reference for revaling the grinding mechanisms of unidirection C_f/SiC.

Key words: unidirection carbon fiber-reinforced ceramic matrix composites(C_f/SiC), grinding, surface quality, orthogonal experiment, grinding mechanism