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以Al72Ni12Co16单相十次准晶为增强颗粒、纯铝和Al-5.5%Zn(质量分数,下同)为基体制备铝基复合材料。采用扫描电镜和能谱分析复合材料的微观组织和颗粒分布情况。结果表明,准晶颗粒在熔体中热稳定性差而发生相转变。θ相呈规则的多变形状分布于Al基体中,颗粒尺寸主要在3.45～40μm范围内分布;与此同时,晶界处还会形成细小的长条状γ相,其尺寸为1.15～8.57μm。力学性能结果表明,最终形成的晶化相有助于提高复合材料的屈服强度、抗拉强度和弹性模量,而延伸率则急剧降低。
Al72Ni12Co16 single-phase ten quasicrystals for the enhanced particles, pure aluminum and Al-5.5% Zn (mass fraction, the same below) as the matrix prepared aluminum matrix composites. The microstructure and particle distribution of the composites were analyzed by SEM and EDS. The results show that quasi-crystalline particles in the melt thermal stability and phase transition occurred. θ is distributed regularly in the Al matrix and the size distribution is mainly in the range of 3.45 ~ 40μm. At the same time, the fine γ-phase is formed in the grain boundaries and the size is 1.15 ~ 8.57μm . Mechanical properties The results show that the final formation of the crystalline phase helps to improve the yield strength, tensile strength and elastic modulus of the composites, while the elongation is drastically reduced.