Wear Behaviors of MoSi2 at Elevated Temperatures
MoSi2 was prepared by SHS,and then pressed under 300 MPa at room temperature and sintered at 1600 ℃ for 1 h in a vacuum furnace.The tribological properties of MoSi2 against Al2O3 in the temperature range from 700℃ to 1100 ℃ were investigated.Microphotographs and phases of the worn surface of MoSi2 were observed by SEM and XRD.Results showed that MoSi2 has well friction and wear properties below 900 ℃.When temperature rises from 900 ℃ to 1000 ℃,wear rate of MoSi2 is raised by 20.8% which is attribute to the change of wear mechanism.The main wear mechanisms of MoSi2 are adhesion and oxidation at high temperatures.When over 900 ℃,because of ductile-brittle transition characteristic of this material,plastic deformation and fracture are also found on the worn surface of MoSi2.This leads to the high wear rate of MoSi2.
MoSi2 Wear behavior Wear mechanism
Houan Zhang Xiaopin HU Weicheng Tan Cun Shi
Advanced Materials Synthesis and Applied Technology Laboratory,Hunan Provincial Key Laboratory of He School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430070,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
961-963
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）