原位反应法制备Al/Al<sub>3</sub>Ti复合材料组织和性能

原位反应法制备Al/Al₃Ti复合材料组织和性能

基金项目: 黑龙江省杰出青年基金

详细信息

摘要

摘要: 本研究采用一种新型的原位反应工艺,使TiO₂粉剂与纯铝熔体反应,生成Al3Ti颗粒,然后采用搅拌铸造法制备Al/Al₃Ti复合材料。生成的Al₃Ti颗粒尺寸细小,为2～3μm,而且分布均匀,与基体结合好。当TiO₂加入量为纯铝基体的30wt%、反应温度为920℃时,复合材料的抗拉强度比纯铝基体提高71.5%,硬度提高134%,而延伸率较纯铝稍有下降。
- 金属基复合材料 /
- 原位反应 /
- 铝 /
- Al₃Ti
Abstract: Purealuminum matrix Al₃Ti particle composite was made by a new in-situmet hod involvingreactions between Al and TiO₂ which was stirred into molten metal. The size of the reinforcement Al₃Ti particle which is homogeneous in the pure Al matrix is 2～3 m. The combination between Al₃Ti and Al matrix is very well. When the amount of TiO₂ is 30wt% and the reaction temperature is 920℃, the streng th and hardness of the composite are higher than those o f purealuminum-matrix by 71.5% and 134%, respectively. However, the ductility of the composite is slightly lower than that of aluminum-matrix.
- metal-matrix composite, in-situ reaction, aluminum, titaniumal uminide /
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