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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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    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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[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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History
  • Received:January 13,2016
  • Revised:February 01,2016
  • Adopted:March 30,2016
  • Online: April 11,2018

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