(武漢科技大學(xué) 材料與冶金學(xué)院, 武漢 430081)
摘 要: 提出了多種氧化物與Al原位反應(yīng)制備陶瓷顆粒增強鋁基復(fù)合材料的新方法，并通過3種反應(yīng)體系CuO/Al， （CuO+SiO2）/Al， （CuO+SiO2+TiO2）/Al制備了3種鋁基復(fù)合材料。 對原位反應(yīng)過程進行了熱力學(xué)分析。 對復(fù)合材料的顯微組織、硬度和力學(xué)性能進行了分析和研究。 結(jié)果表明， 多種氧化物與Al的原位反應(yīng)能發(fā)生并自動進行下去，其反應(yīng)狀況良好。 （CuO+SiO2）/Al， （CuO+SiO2+TiO2）/Al原位反應(yīng)所獲得的增強相顆粒分別是Al2O3和Al2O3+Al3Ti，增強相顆粒在復(fù)合材料中均勻分布， 并且其所制得的復(fù)合材料的硬度與力學(xué)性能明顯好于單一氧化物CuO所制得的復(fù)合材料。
關(guān)鍵字: 鋁；復(fù)合材料； 原位反應(yīng)； 硬度； 力學(xué)性能
with several oxides reaction systems
（College of Materials and Metallurgy,
Wuhan University of Science and Technology, Wuhan 430081, China）
Abstract:A new method to fabricate aluminium matrix composites by in situ reaction between several oxides and pure aluminium powder was proposed. Three kinds of aluminium matrix composites were obtained through three different in situ reaction systems CuO/Al, (CuO+SiO2)/Al and (CuO+SiO2+TiO2)/Al. The thermal analysis of in situ reaction was given. Microstructure, hardness and mechanical properties of composites were researched and discussed. The experiment shows the results of in situ reaction between several oxides and pure aluminium powder are very good. In situ particulates of (CuO+SiO2)/Al and (CuO+SiO2+TiO2)/Al systems are Al2O3 and Al2O3+Al3Ti respectively. The hardness and mechanical properties of composites fabricated with (CuO+SiO2)/Al and (CuO+SiO2+TiO2)/Al systems are much better than those of the composite fabricated with CuO/Al system.
Key words: aluminium; composites; in situ reaction; hardness; mechanical prop
