ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 63, (4) 380 - 389 (2019)


TRIBOLOGICAL INVESTIGATION OF BORON CARBIDE FILMS SLIDING AGAINST DIFFERENT MATING MATERIALS UNDER HIGH RELATIVE HUMIDITY
 
Cao Xueqian 1,2,3, Shang Lunlin 1, Liang Yongmin 2, Lu Zhibin 1, Zhang Guangan 1, Xue Qunji 1
 
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

Keywords: B₄C film, Friction and wear, Mating material, Normal load, Sliding frequency
 

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.


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doi: 10.13168/cs.2019.0034
 
 
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