期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 41, 期 14, 页码 6815-6823出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.07.030
关键词
3DN C/SiC; Self-lubricating composites; MoS2; Lubrication performance; Elevated temperature
资金
- National Natural Science Foundation of China [U1737209, 51772246, 52072306]
The study investigated the performance of 3DN C/SiC-MoS2 self-lubricating composites under different friction times and temperatures, revealing stable friction behavior and service life of the composite materials.
Aerospace lubrication system requires materials with stable service life and excellent elevated-temperature lubrication performance. Herein, MoS2 lubricants were used to fill the pores of three-dimensional needled (3DN)C/SiC to prepare 3DN/SiC-MoS2 self-lubricating composites. The effects of 3DN C/SiC-MoS2 selflubricating composites under different friction time and temperatures were investigated. Results reveals that the average friction coefficients of 3DN C/SiC-MoS2 self-lubricating sample fluctuated between 0.118 and 0.202 under different friction time, and the wear rate maintained about 10(-4) mm(3) /(N m). Especially, the sample under the long friction time of 7200s, with average friction coefficient of 0.161 and lowest wear rate of 3.57x10(-5) mm(3) /(N-m), indicating that the self-lubricating sample has a stable service life. Additionally, the average friction coefficients of 3DN C/SiC-MoS2 self-lubricating sample at 200 degrees C and 400 degrees C were lower than that of at 25 degrees C, and the wear rate increased within the order of 10(-4) mm(3)/(N-m) as the temperature increased.
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