氧化铝短纤维增强ZL109铝合金复合材料的组织与性能的研究

本文以氧化铝短纤维为增强体,用挤压铸造技术制备了氧化铝/铝合金复合材料。研究了复合材料的组织与性能。研究结果表明,纤维在复合材料中分布均匀,与基体结合良好;氧化铝纤维有利于铝硅合金中硅相的非均质成核;和基体合金相比,复合材料具有更高的常温及高温强度、硬度和良好的耐磨性能,是一种性能优异的金属基复合材料。

THE STUDY OF THE STRUCTURES AND THE PROPER-TIES OF THE AI_2O_3/ZL109 COMPOSITES

In this paper, the structures and the properties of alumina short fiber reinforced aluminum alloy composites are studied. The results of the study indicate that the distribution of the fiber in the composites with squeeze casting technique by using alumina short fiber as reinforcement is even, and the fiber combines with the aluminum alloy matrix well. The alumina fiber is favourable to hcterogenous nucleation of the Si phase in Al-Si alloys. Compared with the matrix, the composites have higher tensile strength under both room temperature and elevated temperature, higher hardness and a good wear resistance, and are a metalmatrix composite material of excellent properties.