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Al2O3型壳与DD6单晶合金的界面反应
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北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室,北京航空材料研究院 先进高温结构材料重点实验室

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Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds
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Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials

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    摘要:

    本文采用扫描电子显微镜、能谱分析、X射线衍射分析等手段研究了DD6单晶合金与陶瓷型壳的界面反应。实验结果表明,DD6高温合金与Al2O3型壳的黑色界面反应产物主要是α-Al2O3,并伴有FeCr2O4, (Fe, Ni)固溶体等多种成分相,界面反应层的厚度一般为5~6μm;界面反应后陶瓷型壳内表面出现了TaO, NiO, HfO2等多种反应产物;降低表面粗糙度、控制型壳矿化剂中的Fe2O3杂质含量,能够有效抑制界面反应的产生。

    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.

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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,2018,47(3):840~845.[Yao Jiansheng, Li Xin, Wang Lili, Niu Shuxin, Liu Xiaoguang, Tang Dingzhong, Cao Chunxiao. Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds[J]. Rare Metal Materials and Engineering,2018,47(3):840~845.]
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  • 收稿日期:2016-01-13
  • 最后修改日期:2016-02-01
  • 录用日期:2016-03-30
  • 在线发布日期: 2018-04-11
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