Air plasma-sprayed high-entropy (Y0.2Yb0.2Lu0.2Eu0.2Er0.2)3Al5O12 coating with high thermal protection performance

Kailun Wang, Jinpeng Zhu*, Hailong Wang*, Kaijun Yang, Yameng Zhu, Yubin Qing, Zhuang Ma, Lihong Gao, Yanbo Liu, Sihao Wei, Yongchun Shu, Yanchun Zhou, Jilin He

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

110 引用 (Scopus)

摘要

High-entropy rare-earth aluminate (Y0.2Yb0.2Lu0.2Eu0.2Er0.2)3Al5O12 (HE-RE3Al5O12) has been considered as a promising thermal protection coating (TPC) material based on its low thermal conductivity and close thermal expansion coefficient to that of Al2O3. However, such a coating has not been experimentally prepared, and its thermal protection performance has not been evaluated. To prove the feasibility of utilizing HE-RE3Al5O12 as a TPC, HE-RE3Al5O12 coating was deposited on a nickelbased superalloy for the first time using the atmospheric plasma spraying technique. The stability, surface, and cross-sectional morphologies, as well as the fracture surface of the HE-RE3Al5O12 coating were investigated, and the thermal shock resistance was evaluated using the oxyacetylene flame test. The results show that the HE-RE3Al5O12 coating can remain intact after 50 cycles at 1200 °C for 200 s, while the edge peeling phenomenon occurs after 10 cycles at 1400 °C for 200 s. This study clearly demonstrates that HE-RE3Al5O12 coating is effective for protecting the nickel-based superalloy, and the atmospheric plasma spraying is a suitable method for preparing this kind of coatings.[Figure not available: see fulltext.].

源语言英语
页(从-至)1571-1582
页数12
期刊Journal of Advanced Ceramics
11
10
DOI
出版状态已出版 - 10月 2022

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Wang, K., Zhu, J., Wang, H., Yang, K., Zhu, Y., Qing, Y., Ma, Z., Gao, L., Liu, Y., Wei, S., Shu, Y., Zhou, Y., & He, J. (2022). Air plasma-sprayed high-entropy (Y0.2Yb0.2Lu0.2Eu0.2Er0.2)3Al5O12 coating with high thermal protection performance. Journal of Advanced Ceramics, 11(10), 1571-1582. https://doi.org/10.1007/s40145-022-0630-2