Solid FeS lubricant:a possible alternative to MoS<sub>2</sub> for Cu-Fe-based friction materials

Tao Peng; Qing-zhi Yan; Xiao-lu Zhang; Xiao-jiao Shi

doi:10.1007/s12613-017-1520-4

Volume 24 Issue 11

Nov. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(11): 1278-1283

Tao Peng, Qing-zhi Yan, Xiao-lu Zhang, and Xiao-jiao Shi, Solid FeS lubricant:a possible alternative to MoS₂ for Cu-Fe-based friction materials, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1278-1283. https://doi.org/10.1007/s12613-017-1520-4

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Tao Peng, Qing-zhi Yan, Xiao-lu Zhang, and Xiao-jiao Shi, Solid FeS lubricant:a possible alternative to MoS2 for Cu-Fe-based friction materials, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1278-1283. https://doi.org/10.1007/s12613-017-1520-4

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Solid FeS lubricant:a possible alternative to MoS₂ for Cu-Fe-based friction materials

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Corresponding author:
Qing-zhi Yan E-mail: qzyan@ustb.edu.cn
Received: 13 March 2017; Revised: 23 June 2017; Accepted: 25 June 2017

Abstract

Abstract

Molybdenum disulfide (MoS₂) is one of the most commonly used solid lubricants for Cu-Fe-based friction materials. Nevertheless, MoS₂ reacts with metal matrices to produce metal sulfides (e.g., FeS) and Mo during sintering, and the lubricity of the composite may be related to the generation of FeS. Herein, the use of FeS as an alternative to MoS₂ for producing Cu-Fe-based friction materials was investigated. According to the reaction principle of thermodynamics, two composites-one with MoS₂ (Fe-Cu-MoS₂ sample) and the other with FeS (FeS-Cu₂S-Cu-Fe-Mo sample), were prepared and their friction behaviors and mechanical properties were compared. The results showed that MoS₂ reacted with the Cu-Fe matrix to produce FeS, metallic ternary sulfides, and Mo when sintered at 1050℃. The MoS₂-Cu-Fe and FeS-Cu₂S-Cu-Fe-Mo samples thereby exhibited similar characteristics with respect to phase composition, density, hardness, and tribological behaviors. Micrographs of the worn surfaces revealed that the stable friction regime for both composites stemmed from the iron sulfides friction layers rather than from the molybdenum sulfides layers.
- friction materials;
- solid lubricants;
- iron sulfides;
- molybdenum sulfides

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