High-temperature self-healing behavior of reaction-bonded silicon carbide porous ceramic membrane supports

Guangyu Zhou, Qilin Gu, Huiyu Sun, Ke Zhou, Shibo Yu, Kaiyu Zhou, Feng Han, Wenbo Peng, Zhaoxiang Zhong, Weihong Xing

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

Reaction-bonded silicon carbide porous ceramics (SCPCs) are increasingly employed as membrane supports for the high-temperature filtration. However, the inevitable expansion of cracks limits their application. Herein, we studied the crack propagation behavior of SCPCs and discovered the commendable self-healing properties at high temperatures. Results show that the optimal healing conditions are 1200 °C for 2 h, which can recover the strength from 41.9% to 88.4%, and maintain the initial pore structure and permeance. This is mainly attributed to the infiltration of the multi-phase oxide melt that healed the cracks rather than the oxidation of SiC. Neck cracks are more prone to healing than surface cracks on SiC particles due to the residual compressive stress and a high proportion of melt volume. Nonetheless, the recovery of residual compressive stress and the crack width constrain the upper limit of strength recovery. These insights lay the groundwork for the high-temperature industrial application of SCPCs.

源语言英语
页(从-至)1959-1971
页数13
期刊Journal of the European Ceramic Society
44
4
DOI
出版状态已出版 - 4月 2024

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