SiCp／Al-Fe-V-Si复合材料组织与性能的热稳定性  

Thermostability of hardness and microstructure of SiC_p/Al-Fe-V-Si composite

作　　者：贺毅强[1] 陈振华[1] 王娜[2] 郝亮[1] 陈志钢[1] 陈刚[1] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]淮海工学院机械工程学院,连云港222005

出　　处：《中国有色金属学报》2008年第3期433-438,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50304008)

摘　　要：为研究SiCP/Al-Fe-V-Si复合材料的热稳定性,对多层喷射沉积技术制备的SiC颗粒增强Al-Fe-V-Si合金经过不同温度下的热稳定性实验后进行了硬度检测,并对其显微组织进行了电镜观察。结果表明:随着基体合金材料中Fe含量的提高,复合材料的组织和力学性能具有更好的高温稳定性。添加SiC颗粒后,SiC颗粒向基体中注入Si,由于基体中Si浓度的提高,减慢了合金中第二相弥散粒子的粗化和分解,与未添加SiC颗粒的合金材料相比,添加SiC颗粒复合材料的组织和力学性能具有更好的高温稳定性。The Al-Fe-V-Si alloys reinforced with SiC particles were prepared by multi -layer spray deposition, the hardness was measured by Brinell hardness tester, and the microstructures were observed by TEM. The results show that, with Fe content in the composites increasing, the thermostability of the composites is improved further. The SiC particles injecting Si into matrix slow the coarsening and decomposition of second-phase dispersion particulates by elevation of Si concentration. Compared with alloys without SiC particles, the alloys with SiC particles are characterized with microstructure and mechanical property of better thermostability.

关 键 词：多层喷射沉积 SIC AL-FE-V-SI合金 热稳定性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]