High Speed Lapping of SiC Ceramic Material with Solid (Fixed) Abrasives

• 作 者: 张伟 杨鑫宏 尚春民 胡孝勇 胡忠辉
• 机 构: Research Centre for Space Optical Engineering, Harbin Institute of Technology, Harbin 150001 Heilong
• 出 处: Journal of China Ordnance
• 发表日期: 2005年02期
• 关键词: brittle ceramic workpiece ceramics machining ductile machined roughness abrasive

An experimental investigation is carried out to machine SiC ceramic material through the method of high speed plane lapping with solid(fixed) abrasives after the critical condition of brittle-ductile transition is theoretically analyzed. The results show that the material removal mechanism and the surface roughness are chiefly related to the granularity of abrasives for brittle materials such as SiC ceramic. It is easily realized to machine SiC ceramic in the ductile mode using W3.5 grit and a high efficiency, low cost and smooth surface with a surface roughness of R_a 2.4?nm can be achieved.

An experimental investigation is carried out to machine SiC ceramic material through the method of high speed plane lapping with solid (fixed) abrasives after the critical condition of brittle-ductile transition is theoretically analyzed. The results show that the material removal mechanism and the surface roughness are chiefly related to the granularity of abrasives for brittle materials such as SiC ceramic. It is easy realized to machine SiC ceramic in the ductile mode using W3.5 grit and a high efficiency, low cost and smooth surface with a surface roughness of R_a 2.4 ? nm can be achieved.?