高能超声处理在制备纳米SiC颗粒增强镁基复合材料中的作用  

Effects of High Intensity Ultrasonic Processing on Preparation of SiC Nano-Particles Reinforced Magnesium Matrix Composite

作　　者：刘世英[1] 李文珍[1] 高飞鹏[1] 张琼元[1] 

机构地区：[1]清华大学机械工程系、先进成形制造教育部重点试验室,北京100084

出　　处：《铸造》2009年第3期210-212,216,共4页Foundry

摘　　要：利用高能超声复合法制备了纳米SiC颗粒增强AZ91D复合材料(n-SiCp/AZ91D),并对高能超声效应及其对颗粒/熔体的作用机理进行了分析。测试分析表明,n-SiCp/AZ91D复合材料组织致密,n-SiCp在基体中分散较好,没有发生界面反应。高能超声作用产生的声空化和声流效应,对颗粒/熔体能够起到除气、除渣、高温、高压及润湿作用,将n-SiCp均匀分布到金属熔体中。Magnesium matrix composites reinforced with SiC nano particles （n-SiCp/AZ91D） were fabricated by high intensity ultrasonic. The ultrasonic effects and ultrasonic mechanisms of particles/melts were discussed. The results show that n-SiCp are distributed very well in the matrix and SiC bond well with matrix without forming an intermediate phase. In the particles/melts, the acoustic cavitations and acoustic stream can degas and deslag and bring high temperature and high pressure and wettability effects, so n-SiCp are homogeneously distributed into the melts.

关 键 词：金属基复合材料 高能超声法 纳米SIC颗粒 镁合金 

分 类 号：TB331[一般工业技术—材料科学与工程] TG146.22[金属学及工艺—金属材料]