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

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1959-1971
Number of pages13
JournalJournal of the European Ceramic Society
Volume44
Issue number4
DOIs
StatePublished - Apr 2024

Keywords

  • Porous ceramics
  • Residual stress
  • Self-healing
  • Silicon carbide (SiC)
  • Thermal shock

Fingerprint

Dive into the research topics of 'High-temperature self-healing behavior of reaction-bonded silicon carbide porous ceramic membrane supports'. Together they form a unique fingerprint.

Cite this