Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第5期    总第110期    2008年5月

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文章编号:1004-0609(2008)05-0812-06
SiC/Fe3Al界面的固相反应
曹菊芳1, 2,汤文明1,赵学法1,高建杰1,吴玉程1,郑治祥1

(1. 合肥工业大学 材料科学与工程学院,合肥 230009;2. 安徽建筑工业学院 材料与化学工程学院,合肥 230022)

摘 要: 用扫描电子显微镜、电子能谱仪和X射线衍射仪对SiC/Fe3Al界面固相反应区的成分分布、微结构及相组成等进行分析研究。结果表明:在1 050 ℃1 100 ℃的热处理温度下经10 h扩散反应后,SiC/Fe3Al界面固相反应区由Fe3Si、石墨态CFe-Si-Al三元化合物(FeSiAl5FeSi3Al9)构成,SiC/Fe3Al界面固相反应区由调整的C沉积物区(M-CPZ)和均匀的C沉积物区(R-CPZ)(SiC侧至Fe3Al)构成,调整的C沉积物区的形成归因于SiC的不连续分解。

 

关键词: SiC;Fe3Al;界面固相反应;显微结构

SiC/Fe3Al interfacial solid state reaction
CAO Ju-fang1, 2, TANG Wen-ming1, ZHAO Xue-fa1, GAO Jian-jie1, WU Yu-cheng1, ZHENG Zhi-xiang1

1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;2. School of Materials Science and Engineering, Anhui University of Architecture, Hefei 230022, China

Abstract:The morphologies, microstructures and element composition distributions of the reaction zones were studied by scanning electron microscope (SEM), energy disperse spectroscopy (EDS) and X-ray diffraction analyzer (XRD). The results show that the SiC/Fe3Al interfacial solid state reaction zone is composed of Fe3Si, graphitic carbon precipitates and the Fe-Si-Al ternary compounds(FeSiAl5 and FeSi3Al9) after the SiC/Fe3Al planar interface couples were annealed at 1 050 and 1 100 ℃ for different time. The reaction zone is consisted of the modulated carbon precipitation zone (M-CPZ) and the random carbon precipitation zone (R-CPZ) from the SiC terminal to the Fe terminal. The formation of the M-CPZ is due to the discontinuous decomposition of SiC.

 

Key words: SiC; Fe3Al; interfacial solid state reaction; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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