Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds

Home > Archive>Volume 47, Issue 3, 2018 >840-845

Interface Reactions between DD6 Single Crystal Superalloy and Al2O3 Molds
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Affiliation: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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Received:January 13,2016
Revised:February 01,2016
Adopted:March 30,2016
Online: April 11,2018
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