Journal of Inorganic Materials, Volume. 38, Issue 1, 105(2023)

High Temperature Long-term Service Performance of TiAlCrY/YSZ Coating on TiAl Alloy

Yangyang PAN1...2, Bo LIANG1,*, Du HONG2, Zhixiang QI3, Yaran NIU2 and Xuebin ZHENG2 |Show fewer author(s)
Author Affiliations
  • 11. State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
  • 22. Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • 33. MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China
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    TiAl alloy has excellent properties of low density and high specific strength, which is a potential structural material for aero-engine. The service temperature of TiAl alloy is limited in the range of 700-900 ℃, which is further improved by preparation of high temperature thermal protection coating. In the present work, a new type of TiAlCrY/YSZ coating was prepared on the TiAl alloy by plasma spray technologies, of which long-term service performance at high temperature was compared with the traditional NiCrAlY/YSZ coating. It was found that the TiAlCrY/YSZ coating remained intact after served 300 h at 1100 ℃ in the air, showing excellent high temperature performance, while the service lifetime of the NiCrAlY/YSZ coating at 1100 ℃ was less than 100 h. The microstructure observation found that a continuous and dense TGO composed of Al2O3 was continuously formed on the TiAlCrY bonding coating, suggesting that TiAlCrY coating has good interfacial compatibility with the YSZ top coating. Moreover, the thickness of TGO was still less than 8 μm after served 300 h at 1100 ℃ in the air. As compared with traditional NiCrAlY/YSZ coating, the TiAlCrY/YSZ coating is a more suitable high temperature thermal coating ever for TiAl alloys.

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    Yangyang PAN, Bo LIANG, Du HONG, Zhixiang QI, Yaran NIU, Xuebin ZHENG. High Temperature Long-term Service Performance of TiAlCrY/YSZ Coating on TiAl Alloy[J]. Journal of Inorganic Materials, 2023, 38(1): 105

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    Paper Information

    Category: RESEARCH ARTICLE

    Received: Jun. 11, 2022

    Accepted: --

    Published Online: Sep. 25, 2023

    The Author Email: LIANG Bo (liangbo@ysu.edu.cn)

    DOI:10.15541/jim20220327

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