首页|High temperature lubrication performance of chlorophenyl silicone oil

High temperature lubrication performance of chlorophenyl silicone oil

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Most studies of liquid lubricants were carried out at temperatures below 200 ℃.However,the service temperature of lubricants for aerospace and aeroengine has reached above 300 ℃.In order to investigate the friction mechanism and provide data for high temperature lubrication,the friction and wear properties of chlorophenyl silicone oil(CPSO)-lubricated M50 steel and Si3N4 friction pairs were investigated herein.Ball-on-disk experimental results show that the lubrication performance of CPSO varies significantly with temperature.Below 150 ℃,coefficient of friction(COF)remains at 0.13-0.15 after the short running-in stage(600 s),while the COF in the running-in stage is 0.2-0.3.At 200 ℃and above,the running-in time is much longer(1,200 s),and the initial instantaneous maximum COF can reach 0.5.Under this condition,the COF gradually decreases and finally stabilizes at around 0.16-0.17 afterwards.This phenomenon is mainly due to the different thickness of boundary adsorption film.More importantly,the wear rate of M50 steel increases significantly with the temperature,while the wear rate barely changes at temperatures above 200 ℃.The anti-wear mechanism is explained as tribochemical reactions are more likely to occur between CPSO and steel surface with the increased temperature,generating the FeCl2 protective film on the metal surface.Accordingly,FeCl2 tribochemical film improves the lubrication and anti-wear capacity of the system.At high temperatures(200-350 ℃),FeCl2 film becomes thicker,and the contact region pressure becomes lower due to the larger wear scar size,so the wear rate growth of M50 steel is much smaller compared with that of low temperatures(22-150 ℃).The main findings in this study demonstrate that CPSO lubricant has good anti-wear and lubrication capacity,which is capable of working under temperatures up to 350 ℃.

chlorophenyl silicone oil(CPSO)liquid lubricantanti-wearhigh temperature

Yan MENG、Xiangli WEN、Jie CHENG、Pengpeng BAI、Yonggang MENG、Yu TIAN

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School of Mechanical and Electrical Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China

Department of Mechanical Engineering,State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University,Beijing 100084,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesBeijing Natural Science FoundationBeijing Natural Science FoundationTribology Science Fund of State Key Laboratory of TribologyTribology Science Fund of State Key Laboratory of Tribology

5227519852075037518052922021XJJD0122C101492202020SKLTKF21A01SKLT2022B11

2024

10.1007/s40544-023-0827-6

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CSTPCDEI
ISSN：2223-7690
年,卷(期)：2024.12(8)
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