Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites

被引：0
|
作者：
Shusen Wu
Ya You
Ping An
T. Kanno
H. Nakae
机构：
[1] Huazhong University of Science and Technology,State Key Lab of Dies Technology
[2] Kimura Foundry Co.,Department of Materials Science and Engineering
[3] Ltd.,undefined
[4] Shizuoka,undefined
[5] Waseda University,undefined
来源：
Journal of Materials Science | 2002年 / 37卷
关键词：
Cooling Curve; Microstructure Analysis; Ceramic Particle; Solidification Behavior; Eutectic Silicon;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Thermal analysis is used to establish the relationship between solidification history and the microstructure of SiC particulate reinforced Al-Si alloy-matrix composites. The results show that cooling curves are influenced by the presence of SiC particles and by strontium modification. The eutectic growth temperature of SiCP/359 composites modified with Sr lies in the range of 840 to 843 K, i.e., about 5 to 7 K higher than that of Sr-modified unreinforced 359. For the same composite, the eutectic undercooling is higher with Sr modification than without. The eutectic solidification time of the composites is shorter than that of the unreinforced base alloy because of the presence of the ceramic particles. Strontium modification has the tendency to extend the eutectic solidification time. Microstructure analysis reveals that Sr modification has a refining effect on eutectic silicon for the composites, and SiC particles in the composite melt serve as the substrates for eutectic Si phase nucleation.
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页码：1855 / 1860
页数：5
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