(1. 合肥工業(yè)大學 材料科學與工程學院，合肥 230009；2. 安徽建筑工業(yè)學院 材料與化學工程學院，合肥 230022)
摘 要: 用掃描電子顯微鏡、電子能譜儀和X射線衍射儀對SiC/Fe3Al界面固相反應區(qū)的成分分布、微結構及相組成等進行分析研究。結果表明：在1 050 ℃和1 100 ℃的熱處理溫度下經(jīng)10 h擴散反應后，SiC/Fe3Al界面固相反應區(qū)由Fe3Si、石墨態(tài)C和Fe-Si-Al三元化合物(FeSiAl5及FeSi3Al9)構成，SiC/Fe3Al界面固相反應區(qū)由調(diào)整的C沉積物區(qū)(M-CPZ)和均勻的C沉積物區(qū)(R-CPZ)(從SiC側至Fe3Al側)構成，調(diào)整的C沉積物區(qū)的形成歸因于SiC的不連續(xù)分解。
關鍵字: SiC；Fe3Al；界面固相反應；顯微結構
（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
