Real-time acoustic emission detection of damage mode and failure of EB-PVD thermal barrier coating under CMAS and sea salt corrosion

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

Journal of The European Ceramic Society Pub Date : 2025-03-26 DOI:10.1016/j.jeurceramsoc.2025.117404

Guolin Liu , Wang Zhu , Sai Liu , Jinwei Guo , Zengsheng Ma

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引用次数: 0

Abstract

Real-time acoustic emission (AE) detection of damage mode and failure of electron beam physical vapor deposition (EB-PVD) TBCs under CMAS and sea salt corrosion is investigated. Peak frequency is the key feature parameter that distinguishes the four damage modes: surface vertical cracks (125–170 kHz), sliding interface cracks (275–345 kHz), opening interface cracks (370–450 kHz) and substrate deformation signals (50–110 kHz). The wavelet energy spectral coefficients can serve as effective feature vectors for classifying and identifying AE signals. Structural degradation and interface damage at the heating and holding stages lead to the initiation of surface and interface cracks. Opening interface cracks become most prominent during the cooling stage, due to the significant residual stress generated at the interface. Meanwhile, surface vertical cracks propagate to the coating interface and interact with the interfacial cracks, leading to the coating delamination.

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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.