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Rapid Communication | Open Access

Synthesis and properties of MoAlB composites reinforced with SiC particles

Weiwei ZHANGa, Shibo LIa,b( ), Shuang WUa, Boxiang YAOa, Shukai FANc, Guoping BEIc, Wenbo YUa,b, Yang ZHOUa,b, Ying WUd, Sun-An DINGd
Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Research Center of Rail Vehicles Safety Monitoring and Health Management, Beijing Jiaotong University, Beijing 100044, China
China Porcelain Fuchi (Suzhou) High Tech Nano Materials Co., Ltd., Suzhou 215100, China
School of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, China
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Abstract

Novel MoAlB composites reinforced with 5-15 vol% SiC have been firstly prepared and characterized in the present study. The SiC reinforcement is stable with MoAlB at a sintering temperature of 1200 ℃ in Ar. The 5 vol% SiC/MoAlB composite exhibited improved mechanical properties and enhanced oxidation resistance. A flexural strength of 380 MPa and a Vickers hardness of 12.7 GPa were achieved and increased by 24% and 51%, respectively, as compared with those for MoAlB, indicating the enhanced strengthening effect of SiC. Cyclic oxidation tests at 1200 and 1300 ℃ for 10 h in air showed that the 5 vol% SiC/MoAlB composite has better oxidation resistance than MoAlB due to the formation of a dense and continuous scale composed of Al2O3 and SiO2, which prevents the oxygen inward diffusion and the evaporation of oxides. We expect that the general strategy of second phase reinforcing for materials will help to widen the applications of MoAlB composites.

Keywords

SiC/MoAlB compositemechanical propertiesoxidationmicrostructure

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Journal of Advanced Ceramics
Volume 11 Issue 3,
March 2022
Pages 495-503
DOI: 10.1007/s40145-021-0543-5

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Cite this article:
ZHANG W, LI S, WU S, et al. Synthesis and properties of MoAlB composites reinforced with SiC particles. Journal of Advanced Ceramics, 2022, 11(3): 495-503. https://doi.org/10.1007/s40145-021-0543-5

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Received: 08 September 2021
Revised: 19 September 2021
Accepted: 01 October 2021
Published: 12 January 2022
© The Author(s) 2021.

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