Thermo-mechanical damage of Al2O3-C reticulated porous ceramic and effect of functional coatings

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of The European Ceramic Society Pub Date : 2024-12-25 DOI:10.1016/j.jeurceramsoc.2024.117174

Yajie Dai , Jiajun Zhang , Haodong Wu , Enrico Storti , Jana Hubálková , Qingsheng Bai , Heinz Konietzky , Yawei Li , Christos G. Aneziris

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引用次数: 0

Abstract

Thermo-mechanical performance of carbon-bonded alumina filters is essential for guaranteeing their structural stability and filtration capability. This work investigates the Mode I fracture of Al₂O₃-C porous ceramic as well as the influence of reticulate structure and coatings (alumina and carbon-bonded calcium hexaluminate). The cylindrical splitting test is validated for evaluating the strength of foam and individual strut. DIC and AE techniques were applied to monitor tensile failure induced by compressive loading. The results showed central crack propagation and continuous AE signal release caused by localized damage. Generally, the mechanical strength increases with pore density and the application of alumina coating. This improvement results from more continuous stress transmission and better sintered struts. However, calcium hexaluminate coating is less effective for strengthening foams at room temperature. Both functional coatings and the continuity of reticulate foams show positive effect on the deformation resistance to temperature and load.

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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.