低温烧结原位合成微米级Al2O3颗粒强化Al基复合材料

材料热处理学报, 2007, 28(1): 34-37. doi: 10.3969/j.issn.1009-6264.2007.01.009

低温烧结原位合成微米级Al2O3颗粒强化Al基复合材料

霍宏伟 ^1, , ^2, , 尹红生 ^3, , 陈庆阳 ^4, , 李华为 ^5,

1.沈阳师范大学化学与生命科学学院,辽宁,沈阳,110034

2.Division of Advanced Materials Engineering and Automobile Hi-technology Research Institute,Chonbuk National University, Chonbuk 561756, Korea

3.沈阳师范大学化学与生命科学学院,辽宁,沈阳,110034

4.沈阳师范大学化学与生命科学学院,辽宁,沈阳,110034

5.沈阳师范大学化学与生命科学学院,辽宁,沈阳,110034

基金项目: 沈阳师范大学校科研和教改项目(054-554317) 辽宁省教育厅资助项目(05L413)

关键词：颗粒强化 , Al基复合材料 , 低温烧结 , 原位合成

In situ synthesis of Al matrix composite reinforced with micron-Al2O3 particles by low temperature sintering

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.

参考文献

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