Effect of thermal-cooling cycle treatment on thermal expansion behavior of particulate reinforced aluminum matrix composites

被引：18
作者：
Chen Guo-qin [1 ]
Xiu Zi-yang [1 ]
Yang Wen-shu [1 ]
Jiang Long-tao [1 ]
Wu Gao-hui [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷 / 11期
基金：
中国博士后科学基金;
关键词：
SiC; aluminum matrix composite; thermal expansion behavior; thermal-cooling cycle treatment; SIC PARTICLES; MODEL;
D O I：
10.1016/S1003-6326(09)60432-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Two micron SiC particles with angular and spherical shape and the sub-micron Al(2)O(3) particles with spherical shape were introduced to reinforce 6061 aluminium by squeeze casting technology. Microstructures and effect of thermal-cooling cycle treatment (TCCT) on the thermal expansion behaviors of three composites were investigated. The results show that the composites are free of porosity and SiC/Al(2)O(3) particles are distributed uniformly. Inflections at about 300 degrees C are observed in coefficient of thermal expansion (CTE) versus temperature curves of two SiCp/Al composites, and this characteristic is not affected by TCCT. The TCCT has significant effect on thermal expansion behavior of SiCp/Al composites and CTE of them after 3 cycles is lower than that of 1 or 5 cycles. However, no inflection is observed in Al(2)O(3)p/Al composite, while TCCT has effect on CTE of Al(2)O(3)p/Al composite. These results should be due to different relaxation behavior of internal stress in three composites.
引用
收藏
页码：2143 / 2147
页数：5
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