Microstructure Characteristics of SiC Particle-Reinforced Aluminum Matrix Composites Coatings by Cold Spraying
A dense Al/SiCp composite coating with high volume fraction (60％) of nano SiCp reinforcement was fabricated by cold spraying of ball-milled Al-60SiCp composite powder. The morphologies evolution of the Al-60SiCp composite powder during ball milling and the microstructure and microhardness of the coldsprayed Al-60SiCp composite coating were investigated. The results show that Al particles undergone fracture deformation and nano SiC particles are uniformly distributed in soft Al matrix after ball milling. A dense Al-60SiCp composite coating can be fabricated by cold spraying of ball milled composite powder. Nano SiC particles in the coldsprayed Al-60SiCp composites coating exhibit a reasonably uniform distribution. The Hv0.5 microhardness of the Al-60SiCp composite coating is reached up to (5.30±0.53) GPa due to the enhancement of SiC particles, compared to (0.34±0.03) GPa for the pure Al bulk.
cold spraying ball milling aluminum matrix composites microstructure
Wang Hongtao Ji Gangchang Chen Xiao Bai Xiaobo Chen Qinyu
Jiujiang Key Laboratory for Green Remanufacturing, Jiujiang University, Jiujiang 332005, China
国际会议
西安
英文
460-463
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）