β-(Ni,Pt)Al基悬浮等离子喷涂热障涂层在1300℃时CMAS腐蚀异常失效

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI:10.1016/j.jeurceramsoc.2025.117548

D. Huang , J. Wang , Y.S. Niu , S. Li , Z.B. Bao , S.L. Zhu , F.H. Wang

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引用次数: 0

摘要

用悬浮等离子体喷射6-8 wt%氧化钇稳定氧化锆在β-(Ni,Pt)Al键合层上沉积了垂直裂纹和柱状面涂层。然后，在1300°C下进行CMAS腐蚀试验。结果表明：剥落现象是导致垂直裂纹面漆破坏的主要原因，而柱状面漆则保持了面漆的完整性；造成这种差异的主要因素是柱状面涂层的各向异性断裂韧性，这有利于面外裂纹的产生，加速了CMAS熔液的渗透。因此，它有效地防止了剥离现象，减少了腐蚀过程中CMAS在YSZ上的相对熔量。

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Abnormal failures of CMAS corrosion on suspension plasma sprayed thermal barrier coatings based on β-(Ni,Pt)Al bondcoat at 1300 °C

Vertical-cracked and columnar topcoats were deposited on β-(Ni,Pt)Al bondcoats by suspension plasma spray with 6–8 wt% yttria-stabilized zirconia. Then, the as-sprayed samples were subjected to CMAS corrosion tests at 1300 °C. Results showed that the peeled-off phenomenon is the main factor in failure of vertical-cracked topcoats, while columnar topcoats preserved their integrity. The primary factor contributing to this disparity is the anisotropic fracture toughness in columnar topcoats, which facilitates the occurrence of out-of-plane cracks and expedites the infiltration of CMAS molten. Consequently, it effectively prevents the peeled-off phenomenon and reduces the relative amount of CMAS molten on YSZ during corrosion.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.