•  
  •  
 
Journal of Advanced Ceramics

Authors

Weiwei ZHANG, Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Shibo LI, 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
Shuang WU, Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Boxiang YAO, Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Shukai FAN, China Porcelain Fuchi (Suzhou) High Tech Nano Materials Co., Ltd., Suzhou 215100, China
Guoping BEI, China Porcelain Fuchi (Suzhou) High Tech Nano Materials Co., Ltd., Suzhou 215100, China
Wenbo YU, 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
Yang ZHOU, 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
Ying WU, School of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, China
Sun-An DING, School of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, China

Keywords

SiC/MoAlB composite, mechanical properties, oxidation, microstructure

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.

Share

COinS