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Effect of Vacuum Heat Treatment on Oxidation Behavior of Arc Ion Plated NiCoCrAlY Coatings |
LI Ling1, DU Xiran1, QU Pinquan1, LI Jiancheng1, WANG Jinlong1( ), GU Yan2, ZHANG Jia3, CHEN Minghui1, WANG Fuhui1 |
1.Shenyang National Key Laboratory for Materials Science, Northeastern University, Shenyang 110819, China 2.Aero Engine Corporation of China Shenyang Liming aero-engine Co. Ltd. , Shenyang 110043, China 3.Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110819, China |
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Abstract MCrAlY coatings are widely used for various parts of high-temperature alloy to enhance their corrosion resistance at high temperatures. However, there still exist unavoidable defects within the as-prepared coating, as well as at the interface coating/substrate, which promotes the initiation of cracking and failure of the coating during service at high temperature, and ultimately limits the service life of the alloy components. In this study, NiCoCrAlY coating was deposited on K417G high temperature alloy by arc ion plating, and the coated alloy samples was vacuum heat treated at 950, 1000 and 1050 ℃ respectively for 4 h. Further, the oxidation behavior of the heat-treated samples were assessed isothermally at 1000 ℃ in air for a long term so that to examine the effectiveness of vacuum heat treatment. Finally, the surface and cross-sectional morphology and phase composition of the oxidized coating/alloy were characterized by means of XRD, SEM with EDS. The results show that after vacuum heat treatment the plated NiCoCrAlY coating is tightly bonded to the substrate alloy, the oxidation mass gain of the coatings is relatively slow, and a uniform and dense oxide scale can form on their surface. Among others, the sample after heat-treated at 1000°C provides the best performance, which exhibits better resistance to scale spallation with lower mass gain.
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Received: 14 May 2021
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Fund: National Natural Science Foundation of China(51801021);the Fundamental Research Funds for the Central Universities(N2102015);the Ministry of Industry and Information Technology Project(MJ-2017-J-99) |
Corresponding Authors:
WANG Jinlong
E-mail: Wangjinlong@mail.neu.edu.cn
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About author: WANG Jinlong, E-mail: Wangjinlong@mail.neu.edu.cn
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Cite this article:
LI Ling, DU Xiran, QU Pinquan, LI Jiancheng, WANG Jinlong, GU Yan, ZHANG Jia, CHEN Minghui, WANG Fuhui. Effect of Vacuum Heat Treatment on Oxidation Behavior of Arc Ion Plated NiCoCrAlY Coatings. Journal of Chinese Society for Corrosion and protection, 2022, 42(2): 243-248.
URL:
https://www.jcscp.org/EN/10.11902/1005.4537.2021.108 OR https://www.jcscp.org/EN/Y2022/V42/I2/243
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