(湖南大学机械与汽车工程学院，长沙 410082)
摘 要: 以Ti， Al和C粉末为原料， 采用接触反应法制备原位TiC颗粒增强的铸造 Al-Cu复合材料， 研究了反应温度对反应产物的影响， 探讨了TiC颗粒的形成机制。 结果表明，随着反应温度的升高，副产物TiAl3和 Al4C3生成的可能性减小；当反应 温度为900 ℃时， 反应副产物全部转变为TiC， 且原位反应生成0.5～1.5μm的TiC 颗粒均布于α-Al 基体中； TiC的加入能显著提高基体的强度， 特别是高温强度， 但使其延伸率有所下降。
关键字: 原位反应 TiC颗粒 金属基复合材料 铸造铝铜合金
（Institute of Mechanical and Automotive Engineering,
Hunan University, Changsha 410082, P. R. China）
Abstract:The TiC reinforced Al-Cu composite was prepared by in-situ contact-reaction. The effect of temperature on in situ reaction and formation mechanism of TiC particles have been studied. It is shown that the formation possibility of TiAl3 and Al4C3 decreases with the increase of the reaction temperature and all reaction by-products change into TiC at 900 ℃. TiC(0.5～1.5 μm ) particles formed by in-situ reaction are dispersed in α-Al matrix homogeneously. The addition of TiC particles improves the mechanical properties of matrix at room temperature and especially at elevated temperatures. However, the elongation decreases somewhat.
Key words: in-situ reaction TiC particles metal matrix composite as-cast Al-Cu alloy
