Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 13    No. 5    October 2003

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Properties and microstructures of 7075/SiCp composites prepared by spray deposition
YUAN Wu-hua(袁武华), CHEN Zhen-hua(陈振华),
XU Hai-yang(徐海洋), ZHANG Fu-quan(张福全), FU Ding-fa(傅定发)

Research Institute of Metallic Materials,
College of Materials Science and Engineering,
Hunan University, Changsha 410082, China

Abstract:The 7075/SiCp composites were prepared by spray deposition, extrusion and heat treatment technologies. The microstructures of the deposit, the extruded and heat-treated bars were analyzed. And the mechanical properties and wearing resistance were tested and compared with other aluminum alloys. The results show that the spray deposited preform presents fine microstructure and uniformly distributed SiC particles. Compared with the matrix alloy, the yield strength, modulus and wearing resistance of the peak-aged composites are improved markedly with 50% reduction of elongation. It indicates that the addition of SiC particles greatly contributes to the refining of microstructure and the altering of fracture and wearing mechanisms.


Key words: Al matrix composite; rapid solidification; spray deposition

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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