低温烧结原位合成微米级Al2O3颗粒强化Al基复合材料In situ synthesis of Al matrix composite reinforced with micron-Al2O3 particles by low temperature sintering
霍宏伟,KEE Do-woo,尹红生,陈庆阳,李华为
摘要(Abstract)：
以Al-10wt%SiO2粉末为研究体系,对比机械混合与球磨的粉末,研究了球磨粉末的相组成和微结构,用差热分析的方法确定了两种粉末体系中的置换反应发生的温度,以此为据,优化了烧结两种粉末压坯的工艺。结果表明,4h球磨的粉末颗粒明显细化,部分SiO2颗粒嵌入Al基体,形成反应扩散耦Al/SiO2;混合粉末中置换反应不能发生,球磨粉末中置换反应的温度区间为560-680℃;球磨粉末的压坯在640℃烧结2h,可形成组织均匀的微米级Al2O3颗粒强化Al基复合材料。
关键词(KeyWords)： 颗粒强化;Al基复合材料;低温烧结;原位合成
基金项目(Foundation): 辽宁省教育厅科技攻关项目(05L413);; 沈阳师范大学博士启动基金资助项目(054-554317)
作者(Author): 霍宏伟,KEE Do-woo,尹红生,陈庆阳,李华为
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