Microstructural evolution and its effects on mechanical properties ofspray deposited SiCp/8009Al composites during secondary processing|CHEN Zhi-gang(陈志钢), CHEN Zhen-hua(陈振华), CHEN Ding(陈鼎),HE Yi-qiang(贺毅强), CHEN Gang(陈刚)-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 19 No. 5 October 2009

Microstructural evolution and its effects on mechanical properties ofspray deposited SiC_p/8009Al composites during secondary processing

CHEN Zhi-gang(陈志钢), CHEN Zhen-hua(陈振华), CHEN Ding(陈鼎),
HE Yi-qiang(贺毅强), CHEN Gang(陈刚)

（College of Materials Science and Engineering, Hunan University, Changsha 410082, China）

Abstract:15% (volume fraction) SiC_p/8009Al metal matrix composites(MMCs) prepared by spray co-deposition were hot-extruded and rolled to investigate the effects of porosity and local SiC_pclusters on mechanical properties. The microstructures were examined by using optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffractometry(XRD) and transmission electron microscopy(TEM). The mechanical properties were measured by tensile testing. The experimental results show that lamellar structure is composed of pores and SiC_pclusters and can be improved by secondary processing, enhancing mechanical properties. The main strengthening mechanism and fracture behavior of MMCs were discussed too.

Key words: spray co-deposition; SiC_p/8009Al composites; lamellar structure; porosity; secondary processing

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW