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VACUUM ›› 2023, Vol. 60 ›› Issue (3): 80-85.doi: 10.13385/j.cnki.vacuum.2023.03.14

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Interface Reaction Between a Zr Containing Superalloy and Crucible Refractory Material

ZHANG Feng-xiang1, ZHANG Peng2, LI Yi3, MA Xiu-ping1, LIU Dong-fang1, WAN Xu-jie1, ZHANG Hua-xia1   

  1. 1. Superalloy Casting Division, Beijing Institute of Aeronautical Materials Co., Ltd., Beijing 100095, China;
    2. Air Force of the PLA′s Resident Office in Zhuzhou, Zhuzhou 412002, China;
    3. Purchasing Department, Aecc South Industry Co., Ltd., Zhuzhou 412002, China
  • Received:2023-03-24 Online:2023-05-25 Published:2023-05-30

Abstract: The interface reaction between a Zr containing superalloy and different crucible refractory materials was investigated by dross test, scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS). The results show that the ZrO2 produced by the reaction between Zr in superalloy and oxide ceramic crucible is the main source of dross in alloy ingot. The thermodynamic stability of MgO crucible is lower than that of Al2O3 crucible, and its reaction with Zr is more intense, resulting in more ZrO2 dross. The microstructure of crucible also has an important influence on the interfacial reaction. When the density of the crucible is high and the surface is smooth, the generated ZrO2 is attached to the crucible surface to form a dense ZrO2 layer, which prevents the further reaction between Zr and Al2O3 crucible. When the surface of the crucible is rough, it is difficult to form a dense ZrO2 layer, and the generated ZrO2 enters the alloy melt to form dross. Therefore, the use of Al2O3 crucible with high density, fine structure and good surface quality is conducive to reduce the reaction between superalloy and crucible refractory, and reduce the pollution of alloy ingot.

Key words: superalloy, refractory material, dross, interface reaction, Zr

CLC Number:  TG249.5

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