无压渗透法制备SiCp/Al复合材料工艺优化研究  

Study on Optimization of SiCp/Al Composite Fabricated by Pressureless Infiltration

作　　者：刘树杰[1] 关荣锋[1] 王杏[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454003

出　　处：《材料导报（纳米与新材料专辑）》2008年第1期227-229,共3页

基　　金：河南省2007年重点科技攻关项目(072102240027);河南理工大学博士基金资助项目(648602)

摘　　要：无压渗透法是制备SiCp/Al复合材料的重要技术。应用实验方法系统地研究了无压渗透法的工艺参数和添加元素对制备工艺的影响。结果表明,在无压渗透法制备SiCp/Al复合材料的工艺过程中,浸渗温度是浸渗过程顺利进行的重要因素,900℃的浸渗温度为最佳浸渗温度。适量加入Mg元素能提高熔融金属Al和增强体SiC颗粒之间的浸润性,获得结合强度好、孔洞和疏松较少的SlCp/Al复合材料,Mg元素的最佳含量约为1.2%(质量分数)。适量添加Si元素能增强熔融铝液的流动性,降低SiC颗粒与Al液间的表面张力,改善其润湿性。Pressureless infiltration technique is an important method of fabricating SiCp/Al composite. Process parameters of the pressureless infiltration technique are studied in this paper. And the effects of the additive elements on preparation techniques are experimentally investigated. The results show that the 900℃ is the best temperature of spontaneous infiltration. The additive element Mg enhances the bonding between SiC and the matrix and im- proves the properties of the composites at the same time. The composites with about 1.2wt% element Mg content exhibits much higher mechanical value. By adding element Si, the viscosity of metal liquid is reduced, and the fluidity and wettablity are improved.

关 键 词：SICP/AL 无压渗透 制备工艺 工艺优化 

分 类 号：TB333[一般工业技术—材料科学与工程] TG146.411[金属学及工艺—金属材料]