Interface Reactions between Al<sub>2</sub>O<sub>3</sub> Shells and DZ22 Superalloy

Yao Jiansheng; Tang Dingzhong; Li Xin; Xiao Chengbo; Liu Xiaoguang; Zhou Hankun

doi:10.15980/j.tzzz.2014.06.022

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Interface Reactions between Al₂O₃ Shells and DZ22 Superalloy
Vol. 34, Issue 6, Pages: 630-633(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.06.022

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[1]姚建省,唐定中,李鑫,肖程波,刘晓光,周悍坤.Al_2O_3型壳与DZ22合金的界面反应研究[J].特种铸造及有色合金,2014,34(06):630-633.

Yao Jiansheng, Tang Dingzhong, Li Xin, et al. Interface Reactions between Al₂O₃ Shells and DZ22 Superalloy. [J]. Special Casting & Nonferrous Alloys 34(6):630-633(2014)
[1]姚建省,唐定中,李鑫,肖程波,刘晓光,周悍坤.Al_2O_3型壳与DZ22合金的界面反应研究[J].特种铸造及有色合金,2014,34(06):630-633. DOI： 10.15980/j.tzzz.2014.06.022.

Yao Jiansheng, Tang Dingzhong, Li Xin, et al. Interface Reactions between Al₂O₃ Shells and DZ22 Superalloy. [J]. Special Casting & Nonferrous Alloys 34(6):630-633(2014) DOI： 10.15980/j.tzzz.2014.06.022.

摘要

为解决Al2O3陶瓷型壳与DZ22合金的界面反应问题

通过浇注试验制得试样

借助光学显微镜、SEM、EDS等手段对所得试样的形貌、成分、界面等进行了研究。结果表明

DZ22合金与Al2O3型壳的反应产物表面呈现粉红色

产物主要是Cr2O3;金属-型壳界面处为白色的HfO2反应层;随着Al2O3型壳成分中杂质含量的增加

界面反应的程度逐渐增加。

Abstract

The interface reactions between DZ22directionally solidification superalloy and Al2O3ceramic shells were inverstigated to solve the reaction defects.The surface morphology and the chemical composition of inteface were observed and analyzed by optical microscope and scanning electron microscope with engery dispersive spectroscopy.The results show that the reaction products are Cr2O3with pink on surface and white HfO2at interface of metal-shell.With the increase of the impurity content in slurry for ceramic shells preparation

the reaction degree between superalloy and ceramic shell becomes more serious.