SiC nanoparticles reinforced magnesium matrix composites fabricated by ultrasonic method
SiC nanopartieles reinforeed magnesium matrix composites were fabricated by ultrasonic method. The AZ91 alloy and SiC nanoparticles with the average diameter of 50 nm were used as the matrix alloy and the reinforcement, respectively. The addition of nanoparticles was 0.1％, 0.3％, and 0.5％ (mass fraction) of the eomposites. The results of microstructural evaluation and mechanical properties indicate that the nanoparticles can be dispersed into magnesium alloys efficiently and uniformly with the aid of ultrasonic vibration. As compared with the matrix alloys, the grains of eomposites were refined and the mechanical properties of composites were improved significantly. The SEM and DSC analyses show that the SiC nanopartieles can act as the heterogeneous nucleation of α-Mg. Also, the strengthening mechanism responsible for the composites reinforced with SiC nanoparticles was discussed.
magnesium matrix composites AZ91 alloy SiC nanopartieles ultrasonic method
WANG Zhao-hui WANG Xu-dong ZHAO Yu-xin DU Wen-bo
College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
国际会议
北京
英文
1029-1032
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）