金属/陶瓷复合材料的原位合成及其结构研究
In-situ Preparation and Microstructure of Al(Si)/AlN/MgAl2O4 Composites
摘 要
以铝镁合金、高纯石英棒为原料,采用原位合成法在1473K氮气氛下保温2h制备了Al(Si)/AlN/MgAl2O4复合材料.采用XRD、SEM和EDX等方法分析了所得材料的相组成与显微结构.结果表明:复合材料的物相为MgAl2O4、Al-Si、AlN、Mg2Si和Si;在铝与SiO2界面上形成的Al2O3与基体合金中的镁反应生成块状的MgAl2O4尖晶石晶体,在复合材料内部发现均匀分布的AlN晶须,部分氧、铝、镁、铁形成化合物与硅一起均匀弥散分布于复合材料中.
原位合成
相组成
显微结构
Al(Si)/AlN/MgAl2O4 composite
in-situ synthesis
phase composition
microstructure
Abstract
Al(Si)/AlN/MgAl2O4 composites were synthesized by the in-situ reaction from Al-Mg alloy and SiO2 for 2h at temperature of 1473K in nitrogen atmosphere.The products were characterized using microscopy,X-ray diffraction,scanning electron microscopy and energy dispersive X-ray analysis.The phase composition of the composites consisted of MgAl2O4,Al-Si,AlN,Mg2Si and Si.The microstructure of the composites showed that MgAl2O4 spinels were formed by Mg reacted with Al2O3 at the interface of Al/Al2O3.AlN crystal whisker was found in the composites.Some O,Al,Mg,Fe dissolved in the silicon alloy and homogeneously distributed in the composites around ceramic phases were found.
中图分类号 TB333
所属栏目
基金项目 湖北省青年杰出人才基金资助项目(003ABB009)
收稿日期 2004/10/12
修改稿日期 2005/2/18
网络出版日期
作者单位点击查看
备注朱诚意(1971-),女,湖南汨罗人,讲师,博士研究生.
引用该论文: ZHU Cheng-yi,LI Guang-qiang,ZHANG Feng,PENG Qi-chun,LIU Jun. In-situ Preparation and Microstructure of Al(Si)/AlN/MgAl2O4 Composites[J]. Materials for mechancial engineering, 2006, 30(1): 33～35
朱诚意,李光强,张峰,彭其春,刘君. 金属/陶瓷复合材料的原位合成及其结构研究[J]. 机械工程材料, 2006, 30(1): 33～35
被引情况:
【1】王开,翟彦博,刘昌明,邹茂华, "离心铸造制备原位初晶硅和Mg2Si颗粒增强铝基骤变复合材料的组织与性能",机械工程材料 34, 47-51(2010)
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【6】刘军芳,傅正义,王皓.放电等离子烧结氮化铝透明陶瓷的研究[J].硅酸盐学报,2003,31(3):320-323.
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