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Research Article | Open Access

Self-healing behavior of Ti2AlC at a low oxygen partial pressure

Boxiang YAOaShibo LIa( )Weiwei ZHANGaWenbo YUaYang ZHOUaShukai FANbGuoping BEIb
Center of Materials Science and Engineering, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
China Porcelain Fuchi (Suzhou) High Tech Nano Materials Co., Ltd., Suzhou 215100, China
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Graphical Abstract


Ti2AlC, a MAX phase ceramic, has an attractive self-healing ability to restore performance via the oxidation-induced crack healing mechanism upon healing at high temperatures in air (high oxygen partial pressures). However, such healing ability to repair damages in vacuum or low oxygen partial pressure conditions remains unknown. Here, we report on the self-healing behavior of Ti2AlC at a low oxygen partial pressure of about 1 Pa. The experimental results showed that the strength recovery depends on both healing temperature and time. After healing at 1400 ℃ for 1–4 h, the healed samples exhibited the recovered strengths even exceeding the original strength of 375 MPa. The maximum recovered strength of ~422 MPa was achieved in the healed Ti2AlC sample after healing at 1400 ℃ for 4 h, about 13% higher than the original strength. Damages were healed by the formed TiCx from the decomposition of Ti2AlC. The decomposition-induced crack healing as a new mechanism in the low oxygen partial pressure condition was disclosed for the MAX ceramics. The present study illustrates that key components made of Ti2AlC can prolong their service life and keep their reliability during use at high temperatures in low oxygen partial pressures.


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Journal of Advanced Ceramics
Pages 1687-1695
Cite this article:
YAO B, LI S, ZHANG W, et al. Self-healing behavior of Ti2AlC at a low oxygen partial pressure. Journal of Advanced Ceramics, 2022, 11(11): 1687-1695.








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Received: 27 May 2022
Revised: 26 July 2022
Accepted: 10 August 2022
Published: 19 October 2022
© The Author(s) 2022.

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