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姚建省,李鑫,王丽丽,牛书鑫,刘晓光,唐定中,曹春晓.Al2O3型壳与DD6单晶合金的界面反应[J].稀有金属材料与工程(英文),2018,47(3):840~845.[Yao Jiansheng,Li Xin,Wang Lili,Niu Shuxin,Liu Xiaoguang,Tang Dingzhong and Cao Chunxiao.Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds[J].Rare Metal Materials and Engineering,2018,47(3):840~845.]
Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds
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Received:January 13, 2016  Revised:February 01, 2016
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Key words: DD6 single crystal superalloy  Al2O3 ceramic mold  interface reaction
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Yao Jiansheng,Li Xin,Wang Lili,Niu Shuxin,Liu Xiaoguang,Tang Dingzhong and Cao Chunxiao  
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Abstract:
      The interface reactions between DD6 single crystal superalloy and ceramic shells were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X ray diffraction analysis (XRD) in this paper. The results show that the black reaction products were α-Al2O3, accompanied by FeCr2O4、taenite-(Fe, Ni) at the same time. The thickness of the reaction layer was about 5~6μm. The reaction products TaO, NiO, HfO2 were observed on the prime coat of the ceramic shell. The interface reactions can be inhibited by reducing the roughness of the facecoat and controlling the content of Fe2O3 in the mineralizer simultaneously.