摘要
采用无压浸渗方法制备了SiC颗粒增强铝基复合材料,研究了材料的微观组织和力学性能。结果表明,复合材料浸渗完全,SiC颗粒分布均匀,无偏聚现象。铸造态复合材料中存在界面反应,经过透射电镜观察和XRD分析确认该界面反应物为MgAl2O4。界面反应的存在提高了润湿性,促进了无压自发浸渗。高温热暴露处理可以提高复合材料的布氏硬度,热暴露处理后的界面反应物呈块状弥散分布,但是反应物的数量略有增加。
The SiCp/Al composite was fabricated by pressureless infiltration technique, and its microstructure and mechanical property were investigated. The results show that the composite is fully infiltrated and the particles are distributed uniformly in the composite. Interfacial reactions are found in the as-cast composite and the reaction product is identified as MgA1204 by TEM observation and XRD analysis. The interfacial reactions enhance the wettability and promote the spontaneous infiltration process. The thermal exposure process increases the Brinell hardness of the composite. After the thermal exposure process, the blocky interfacial reaction products are distributed discretely, but the amount of the reaction products is increased.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2005年第5期657-660,共4页
Chinese Journal of Rare Metals
基金
中国博士后科学基金资助项目
关键词
SIC
铝基复合材料
无压浸渗
界面
硬度
silicon carbide
aluminum matrix composite
pressureless infiltration
interface
hardness
