An in-depth exploration of microstructural characteristics and phase evolution in RE-silicates (RE= Er0.25Tm0.25Yb0.25Lu0.25) multiphase environmental barrier coatings utilizing digital image processing techniques

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

Journal of The European Ceramic Society Pub Date : 2025-02-10 DOI:10.1016/j.jeurceramsoc.2025.117276

Keyu Wang , Ziyu Wang , Tiefeng Du , Yang Cui , Zhixin Luo , Yixiu Luo , Jing Liu , Luchao Sun , Jingyang Wang

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引用次数: 0

Abstract

Multiphase high-entropy rare-earth silicate environmental barrier coatings (EBCs) were processed using atmospheric plasma spraying (APS) method with six specifically designed feedstocks, each comprising varying proportions of (Er_0.25Tm_0.25Yb_0.25Lu_0.25)₂Si₂O₇ and (Er_0.25Tm_0.25Yb_0.25Lu_0.25)₂SiO₅. The microstructural characteristics and phase evolution of the as-deposited coatings, as well as those subjected to annealing at 1300 °C, were investigated. For quantitative comparison, a comprehensive analysis was conducted on phase distribution and proportions, crack area percentages, mean crack widths, porosity and pore sizes were systematically analyzed using digital image processing techniques. Results indicate that a higher disilicate proportion in the topcoats (M25D75, M10D90 and D100) reduces cracking and ensures balanced microstructural morphologies of coatings, suggesting enhanced performance in EBC applications. Additionally, this study demonstrates that the compositional and microstructural characteristics of rare earth silicates in EBCs can be effectively controlled through judicious adjustment of feedstock composition.

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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.