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高体积分数粒子型铝基复合材料热膨胀性能的研究
引用本文:喇培清,许广济,丁雨田.高体积分数粒子型铝基复合材料热膨胀性能的研究[J].复合材料学报,1998,15(2):6-11.
作者姓名:喇培清  许广济  丁雨田
作者单位:1. 中科院兰州化物所固体润滑开放研究实验室,兰州,730000
2. 甘肃工业大学,兰州,730050
摘    要:测定了真空气压渗流法制备的三种高体积分数SiCP/Al 复合材料在0~ 400℃间的热循环曲线及其在此温度区间的线膨胀系数值。测试结果表明复合材料的线膨胀系数值约为其基体的一半, 其值与Kerner 模型的计算值相接近; 复合材料的热循环曲线的特征明显不同于其基体, 三种基体复合材料的热循环曲线的特征也存在差异。对此应用塑性变形理论进行了解释。发现通过改变合金基体可改变热循环曲线的封闭性。

关 键 词:热循环曲线    线膨胀系数    塑性变形    SiCP/Al  复合材料    高体积分数    电子封装

STUDY OF THERMAL EXPANSION PROPERTY FOR HIGH VOLUME FRACTION PARTICULATE REINFORCED ALUMINIUM MATRIX COMPOSITES
La Peiqing,Xu Guangji,Ding Yutian.STUDY OF THERMAL EXPANSION PROPERTY FOR HIGH VOLUME FRACTION PARTICULATE REINFORCED ALUMINIUM MATRIX COMPOSITES[J].Acta Materiae Compositae Sinica,1998,15(2):6-11.
Authors:La Peiqing  Xu Guangji  Ding Yutian
Affiliation:1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000; 2. Gansu University of Technology, Lanzhou 730050
Abstract:In this paper, the linear expansion coefficient and thermal cycling curve of three kinds of high volume fraction SiCP /Al matrix composites fabricated by vacuum assisted gas pressure infiltration casting were tested at 0~400℃ temperature interval. The results show that the linear expansion coefficient of composites is about half the value of its matrix. The composites' thermal cycling curve is obviously different from that of its matrix. Thermal cycling curves of three composites are also different from each other. It is explained by the theory of plastic strain in matrix. It was found that closing characteristic of thermal cycling curve for composite can be optimized by changing its matrix.
Keywords:thermal cycling curve  linear expansion coefficient  plastic strain  " target="_blank">P/Al compositezz')" href="#">      SiCP/Al composite  high volume fraction
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