运用挤压铸造法制备了SiC泡沫陶瓷/SiC颗粒/Al混杂复合材料,研究了温度和SiC泡沫陶瓷体积分数对复合材料热膨胀的影响.结果表明:随着温度的升高,复合材料的热容逐渐增大,热扩散系数、导热系数逐渐减小.随着增强体SiC体积分数的增大,复合材料的热容线性下降,热扩散系数和导热系数均非线性减小.由于混杂复合材料具有独特的复式双连续结构,复合材料的导热系数大于130W/(m·℃).
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