Ti<sub>3</sub>SiC<sub>2</sub>/Inconel 718摩擦副的高温摩擦学性能

李慧; 任书芳; 商剑; 吕晋军

Ti₃SiC₂/Inconel 718摩擦副的高温摩擦学性能

李慧^1,2,
任书芳³,
商剑^1,2,
吕晋军^3, ,

1.
1. 中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州 730000
2.
2. 中国科学院北京研究生院,北京 100049
3.
中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州 730000

基金项目:

国家自然科学基金面上项目(51075382)和中国科学院重大院方向性项目(YYYJ-0931)资助.

详细信息

中图分类号: TH117.3
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出版历程
- 收稿日期: 2012-09-25
- 修回日期: 2012-10-15

Tribological Properties of Ti₃SiC₂-Inconel 718 Couple at Elevated Temperatures

1.
1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
3.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

摘要

摘要: 本文考察了Ti₃SiC₂-Inconel 718摩擦副从室温到800 ℃范围内的摩擦磨损性能.结果表明:温度的升高有利于改善Ti₃SiC₂-Inconel 718摩擦副的摩擦磨损性能,在800 ℃时,其摩擦磨损性能优异.随着温度的升高,摩擦系数从室温的0.71降至800 ℃时的0.37,Ti₃SiC₂的磨损率从4×10^-3 mm³/(N·m)降至10^-5 mm³/(N·m)以下.高温塑性变形和摩擦氧化物层的形成导致摩擦系数的降低,300 ℃以下,晶粒的断裂、拔出与脱落以及材料向合金的转移造成了Ti₃SiC₂高的磨损率,从400 ℃至800 ℃,Ti₃SiC₂晶粒的断裂与脱落受到明显抑制,其磨损率显著降低.
- Ti₃SiC₂ /
- 高温 /
- 摩擦 /
- 磨损
Abstract: The tribological properties of Ti₃SiC₂ sliding against Ni-based alloy Inconel 718 from ambient temperature to 800 ℃ were investigated. The experiment results indicated that the tribological behaviors of the couple were improved with the increase of temperatures. The Ti₃SiC₂-Inconel 718 couple presented excellent tribological properties at 800 ℃. The friction coefficient was 0.81 at ambient temperature and wear rate of Ti₃SiC₂ was 4×10^-3 mm³/(N·m). In contrast, the friction coefficient was 0.37 at 800 ℃ and the wear rate of Ti₃SiC₂ reduced to 10^-5 mm³/(N·m). The deformation at elevated temperature and the tribo-oxidation led to the decrease of friction coefficient. The high wear rate of Ti₃SiC₂ was determined by the fracture and pullout of Ti₃SiC₂ grains and material transfer to the counterbody alloy during the sliding process below 300 ℃,while at 400~800 ℃,the fracture and pull-out of Ti₃SiC₂ grains were inhibited which resulted in the very low wear rate.
- Ti₃SiC₂ /
- elevated temperature /
- friction /
- wear

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参考文献(10)

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