Molten CMAS resistance of PS-PVD (Gd0.2Y0.8)3Al5O12 /YSZ thermal barrier coating with high adherence

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-23 DOI:10.1016/j.jeurceramsoc.2025.117846

Xingya Zhu , Wenting He , Yiqian Guo , Liangliang Wei , Dongrui Liu , Hongbo Guo , Hui Peng

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引用次数: 0

Abstract

Calcium-magnesium-alumina-silicate (CMAS) deposits significantly accelerate the degradation of thermal barrier coatings (TBCs) in advanced aeroengines, thereby posing a substantial threat to aviation safety. In this study, (Gd_0.2Y_0.8)₃Al₅O₁₂ (GYAG)/YSZ double-ceramic-layer thermal barrier coatings (TBCs), comprising dense GYAG on top and columnar YSZ beneath, were fabricated via plasma spray-physical vapor deposition (PS-PVD) in a single-step process to mitigate CMAS attack. High-temperature exposure tests at 1250 °C demonstrated the excellent phase stability of GYAG coating and interface stability of GYAG/YSZ coating. The interactions between CMAS and GYAG/YSZ coatings were investigated. Results showed that CMAS melt infiltration was suppressed. GYAG coating reacted rapidly with CMAS to crystallize apatite, garnet and anorthite phases with high-melting-point. These crystalline phases are alternatively distributed and collectively inhibit CMAS infiltration. The doping of Gd in GYAG coating facilitated precipitation of apatite, which is crucial for CMAS resistance enhancement.

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PS-PVD (Gd0.2Y0.8)3Al5O12 /YSZ热障涂层耐熔融CMAS性能的研究

硅酸钙镁铝（CMAS）沉积物显著加速了先进航空发动机热障涂层（tbc）的降解，从而对航空安全构成重大威胁。在这项研究中，（Gd0.2Y0.8）3Al5O12 (GYAG)/YSZ双陶瓷层热障涂层（tbc）由致密的GYAG和柱状的YSZ组成，通过等离子喷涂-物理气相沉积（PS-PVD）在单步工艺中制备，以减轻CMAS的攻击。1250℃高温暴露试验表明，GYAG涂层具有良好的相稳定性和界面稳定性。研究了CMAS与GYAG/YSZ涂层之间的相互作用。结果表明，CMAS熔体入渗受到抑制。GYAG涂层与CMAS反应迅速，形成高熔点磷灰石、石榴石和钙长石相结晶。这些结晶相交替分布，共同抑制CMAS的渗透。Gd在GYAG涂层中的掺杂促进了磷灰石的析出，这是增强抗CMAS性能的关键。

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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.