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反应熔渗法制备B4C/Al-AlN复合材料的研究

发表时间:2009-11-30  浏览量:1243  下载量:651
全部作者: 翁哲,马南钢
作者单位: 华中科技大学材料科学与工程学院,材料成形与模具技术国家重点实验室
摘 要: 采用反应熔渗法,将熔融金属Al渗入B4C-BN多孔预制体中制备了B4C/Al-AlN复合材料,运用扫描电子显微镜(scanning electron microscope,SEM)和X射线衍射(X-ray diffraction,XRD)仪分析了复合材料的成分以及微观形貌,并对制备过程中发生的化学反应进行了初步探讨。结果表明:制备过程中发生了B4C,BN和Al的三元反应,且反应仅有AlN生成。所制备的复合材料具有双连续相结构,B4C相和Al相各自形成三维连通的网状结构,高导热的AlN颗粒均匀分布在Al相中,这种结构将有助于提高材料的导热性能。
关 键 词: 复合材料;B4C/Al-AlN;反应熔渗法;电子封装材料
Title: Research on B4C/Al-AlN composites prepared by reactive melt infiltration
Author: WENG Zhe, MA Nangang
Organization: State Key Laboratory of Material Processing and Die & Mould Technology, College of Materials Science and Engineeing, Huazhong University of Science and Technology
Abstract: Through infiltrating molten Al into B4C-BN porous preforms, B4C/Al-AlN composites were prepared by reactive melt infiltration. The microstructures and phases of the composites were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The chemical reaction happened during infiltration process was discussed. The results indicate that AlN is the only product in the infiltration process when B4C and BN react with Al. Due to the three-dimensional interconnected structure of the porosity in preforms, an interpenetrating network of B4C phase and Al phase results, and the AlN particles, with high thermal conductivity, exist in Al phase evenly. That structure will be conducive to improving thermal conductivity of composites.
Key words: composites; B4C/Al-AlN; reactive melt infiltration; electronic packaging materials
发表期数: 2009年11月第22期
引用格式: 翁哲,马南钢. 反应熔渗法制备B4C/Al-AlN复合材料的研究[J]. 中国科技论文在线精品论文,2009,2(22):2407-2411.
 
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