Ceramics-Silikáty 63, (4) 380 - 389 (2019) |
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TRIBOLOGICAL INVESTIGATION OF BORON CARBIDE FILMS SLIDING AGAINST DIFFERENT MATING MATERIALS UNDER HIGH RELATIVE HUMIDITY
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Cao Xueqian 1,2,3, Shang Lunlin 1, Liang Yongmin 2, Lu Zhibin 1, Zhang Guangan 1, Xue Qunji 1
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1 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2 State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
3 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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Keywords: B₄C film, Friction and wear, Mating material, Normal load, Sliding frequency
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Tribological performances are significantly affected by the tribo-chemical reaction of the mating materials, while the effect on the B₄C film under high relative humidity conditions are poorly investigated. Therefore, fiction tests of three tribo-pairs (B₄C/WC, B₄C/steel and B₄C/Al₂O₃) under 85% RH with various normal loads and sliding frequencies were performed. The results show that the B₄C/WC tribo-pair exhibits excellent tribological properties, including very stable friction curves, minimum friction coefficients & wear rates, maximum carrying-load capacity and the smallest fluctuations with the change of the normal load. Similar results have been obtained for the B₄C/WC tribo-pair with the increase in the sliding frequency. This is mainly attributed to the oxidation of WC to form WO₃ that is conducive in enhancing the tribological performances. Therefore, the sliding contact of B4₄C/WC is the desirable design for engineering applications under high relative humidity. |
 PDF (9.4 MB) |
doi: 10.13168/cs.2019.0034
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