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Article

Self-Healing of SiC-Al2O3-B4C Ceramic Composites at Low Temperatures

1
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
2
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
3
Institute of Advanced Materials Manufacturing Equipment and Technology, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Academic Editor: Tomasz Sadowski
Materials 2022, 15(2), 652; https://doi.org/10.3390/ma15020652
Received: 16 December 2021 / Revised: 8 January 2022 / Accepted: 12 January 2022 / Published: 15 January 2022
Self-healing ceramics have been researched at high temperatures, but few have been considered at lower temperatures. In this study, SiC-Al2O3-B4C ceramic composite was compacted by spark plasma sintering (SPS). A Vickers indentation was introduced, and the cracks were healed between 600 °C and 800 °C in air. Cracks could be healed completely in air above 700 °C. The ceramic composite had the best healing performance at 700 °C for 30 min, recovering flexural strength of up to 94.2% of the original. Good crack-healing ability would make this composite highly useful as it could heal defects and flaws autonomously in practical applications. The healing mechanism was also proposed to be the result of the oxidation of B4C. View Full-Text
Keywords: self-healing; SiC-Al2O3-B4C; flexural strength; low temperatures self-healing; SiC-Al2O3-B4C; flexural strength; low temperatures
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MDPI and ACS Style

Wang, B.; Tu, R.; Wei, Y.; Cai, H. Self-Healing of SiC-Al2O3-B4C Ceramic Composites at Low Temperatures. Materials 2022, 15, 652. https://doi.org/10.3390/ma15020652

AMA Style

Wang B, Tu R, Wei Y, Cai H. Self-Healing of SiC-Al2O3-B4C Ceramic Composites at Low Temperatures. Materials. 2022; 15(2):652. https://doi.org/10.3390/ma15020652

Chicago/Turabian Style

Wang, Baoguo, Rong Tu, Yinglong Wei, and Haopeng Cai. 2022. "Self-Healing of SiC-Al2O3-B4C Ceramic Composites at Low Temperatures" Materials 15, no. 2: 652. https://doi.org/10.3390/ma15020652

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