论文部分内容阅读
采用粉末冶金工艺,以纯金属粉末及普通工业磨料α-SiCP为原料、在空气气氛中采用液相烧结法制备了5vol%SiC颗粒增强锌铝基复合材料。结果表明:该复合材料的抗压强度、硬度和耐磨性均比相同工艺下制备的锌铝合金显著提高,磨损量远小于基体合金和铸造合金。这是因为该复合材料中形成了共析组织,且相界面增多,塑性变形抗力增大,硬质点数量增多。
A 5vol% SiC particle reinforced zinc-aluminum matrix composite was prepared by liquid-phase sintering in air atmosphere using powder metallurgy process, using pure metal powder and common industrial abrasive α-SiCP as raw material. The results show that the compressive strength, hardness and wear resistance of the composites are significantly higher than that of the Zn-Al alloy prepared by the same process, the wear loss is much less than that of the matrix alloy and the cast alloy. This is because the composite material formed in the eutectoid tissue, and the phase interface increased plastic deformation resistance increases, the number of hard points increased.