摘要
采用挤压铸造方法,制备了高体积分数的Si_p/4032Al复合材料。显微组织观察表明,复合材料组织致密,颗粒分布均匀,材料中没观察到孔洞和缺陷;复合材料的线膨胀系数介于(8．1～12)×10^(-6)/K之间可调,并且随着增强体含量的增加而降低,退火后线膨胀系数略有降低,Kerner模型能够较好的预测复合材料的线膨胀系数;复合材料的热导率可达103 W/(m·K),随着增强体含量的增加略有下降,退火处理后热导率略有升高,热导率计算结果均大于测试值。
Sip/Al composites with large content of Si particles are fabricated by squeeze-casting technology. The microstructure observation shows that the composites are dense and Si particles are distributed uniformly, moreover, no holes and defects are observed within the composites, The linear CTE of Sip/Al composites lies between （8.1 12 ） 10^ -6/K and is increased, with increase of the contents of Si particles and decreased after annealing. Kerner model can predict the coefficient of thermal expansion （CTE） of Sip/Al composites moderately. The thermal conductivity can reach 103W/（ m · K）, which is decreased with increase of the contents of Si particles and increased after annealing The thermal conductivity calculated is higher than that tested.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2007年第2期26-29,共4页
Aerospace Materials & Technology
基金
2005年哈尔滨市科技攻关计划项目(2005AA5CG041)
关键词
铝基复合材料
Si颗粒
热膨胀
热导率
Aluminum matrix composite, Si particles, Thermal expansion, Thermal conductivity
