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Journal of Advanced Ceramics 2022, 11(3): 495-503 https://doi.org/10.1007/s40145-021-0543-5
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Synthesis and properties of MoAlB composites reinforced with SiC particles

Show Author's Information 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
Keywords:
microstructure, mechanical properties, oxidation, SiC/MoAlB composite
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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Abstract Full text About this article

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.


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About this article

Synthesis and properties of MoAlB composites reinforced with SiC particles

Show Author's information 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

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: microstructure, mechanical properties, oxidation, SiC/MoAlB composite

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Publication history

Received: 08 September 2021
Revised: 19 September 2021
Accepted: 01 October 2021
Published: 12 January 2022
Issue date: March 2022

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© The Author(s) 2021.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51772020) and Beijing Government Funds for the Constructive Project of Central Universities.

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