(湖南大學機械與汽車工程學院，長沙 410082)
摘 要: 以Ti， Al和C粉末為原料， 采用接觸反應法制備原位TiC顆粒增強的鑄造 Al-Cu復合材料， 研究了反應溫度對反應產(chǎn)物的影響， 探討了TiC顆粒的形成機制。 結果表明，隨著反應溫度的升高，副產(chǎn)物TiAl3和 Al4C3生成的可能性減小；當反應 溫度為900 ℃時， 反應副產(chǎn)物全部轉變?yōu)門iC， 且原位反應生成0.5～1.5μm的TiC 顆粒均布于α-Al 基體中； TiC的加入能顯著提高基體的強度， 特別是高溫強度， 但使其延伸率有所下降。
關鍵字: 原位反應 TiC顆粒 金屬基復合材料 鑄造鋁銅合金
（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
