【摘要】 研究了采用Si3N4与Al的混合粉,经压制、烧结制备AlN/Al-Si复合材料的技术方法。试验结果表明:AlN的反应生成机制属于一种连续渐进式反应形成过程,即于高温下液相Al中的Al原子渗入Si3N4的晶体点阵取代Si原子而逐渐使之向AlN晶体点阵转化的过程。被取代的Si原子从固相Si3N4中析出,扩散溶入液相Al中,冷却后形成Al-Si合金固溶体,一般呈网状分布于AlN晶体相的周围。新生成的AlN与Al-Si合金相之间表现出很好的界面亲和性。更多还原

【Abstract】 AlN/Al- Si composites were synthesized adopting mixed powder of Si3N4 and Al by pressing and sinttering. The results show that the formation mechanism of AlN is a continuous progressive process. The Si atoms substituted separate out from solid phase Si3N4, diffuse and dissolve liquid phase Al, and form Al- Si alloy solid solution after cooling, commonly distributing around AlN crystal by mode of reticulation. The newer formed AlN behaves finer interface affinity with Al- Si alloy.更多还原