EB-PVD 法制备的 RE2M2O7/YSZ TBC 在气体热冲击-CMAS 腐蚀环境中的失效行为

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

Journal of The European Ceramic Society Pub Date : 2024-10-26 DOI:10.1016/j.jeurceramsoc.2024.117027

Gang. Yan , Wei. Liu , Yu. Sun , Cong. Li , Li. Yang , Yi. Chun. Zhou

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引用次数: 0

摘要

通过 EB-PVD 沉积了三种热障涂层 (TBC)：YSZ、LZC/YSZ 和 GZO/YSZ。然后使用高温气体喷枪对这些涂层系统进行了热冲击-CMAS 腐蚀测试。结果表明，双层隔热涂层具有优异的抗热震-CMAS 腐蚀性能。微观结构分析表明，LZC/YSZ 涂层通过与 CMAS 的高温化学作用，在 CMAS/LZC 界面形成了密封层，从而减轻了热损伤。与 LZC/YSZ 相比，GZO/YSZ 涂层对 CMAS 引起的损伤具有更强的抵抗力，这与较低的理论光学碱度值有关。这项研究为了解涡轮叶片上 TBC 的热冲击-CMAS 耦合腐蚀失效机制提供了宝贵的见解，并为 TBC 的新系统安全应用铺平了道路。

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Failure behavior of RE2M2O7/YSZ TBCs prepared by EB-PVD in gas thermal shock-CMAS corrosion environment

Three types of thermal barrier coatings (TBCs), YSZ, LZC/YSZ and GZO/YSZ, were deposited by EB-PVD. These coating systems were then subjected to thermal shock-CMAS corrosion testing using a high-temperature gas spray gun. The results demonstrate that the double-layer thermal barrier coatings exhibit excellent resistance to thermal shock-CMAS corrosion. Microstructural analysis revealed that the LZC/YSZ coating mitigated thermal damage owing to the formation of a sealing layer at the CMAS/LZC interface through high-temperature chemical interactions with CMAS. Compared to LZC/YSZ, the GZO/YSZ coatings showed greater resistance to CMAS-induced damage, which was associated with lower theoretical optical basicity values. This research provides valuable insights into the coupled thermal shock-CMAS corrosion failure mechanisms of TBCs on turbine blades and paves the way for new system-safe applications of TBCs.

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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.