多种氧化物原位反应制备的Al_2O_3/Al复合材料

In situ processed Al_2O_3/Al composites with several oxides reaction systems

提出了多种氧化物与Al原位反应制备陶瓷颗粒增强铝基复合材料的新方法 ,并通过 3种反应体系CuO/Al,(CuO +SiO2 ) /Al,(CuO +SiO2 +TiO2 ) /Al制备了 3种铝基复合材料。对原位反应过程进行了热力学分析。对复合材料的显微组织、硬度和力学性能进行了分析和研究。结果表明 ,多种氧化物与Al的原位反应能发生并自动进行下去 ,其反应状况良好。(CuO +SiO2 ) /Al,(CuO +SiO2 +TiO2 ) /Al原位反应所获得的增强相颗粒分别是Al2 O3 和Al2 O3 +Al3 Ti,增强相颗粒在复合材料中均匀分布 ,并且其所制得的复合材料的硬度与力学性能明显好于单一氧化物CuO所制得的复合材料。

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+SiO 2)/Al and (CuO+SiO 2+TiO 2)/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+SiO 2)/Al and (CuO+SiO 2+TiO 2)/Al systems are Al 2O 3 and Al 2O 3+Al 3Ti respectively. The hardness and mechanical properties of composites fabricated with (CuO+SiO 2)/Al and (CuO+SiO 2+TiO 2)/Al systems are much better than those of the composite fabricated with CuO/Al system.