Low-cost solid FeS lubricant as a possible alternative to MoS2 for producing Fe-based friction materials

作者：Peng, Tao; Yan, Qing-zhi^*; Zhang, Yan; Shi, Xiao-jiao; Ba, Ming-yang

来源：International Journal of Minerals,Metallurgy and Materials, 2017, 24(1): 115-121.

DOI：10.1007/s12613-017-1385-6

• friction materials
• solid lubricants
• iron sulfides
• molybdenum sulfides

Three reaction systems of MoS2-Fe, FeS-Fe, and FeS-Fe-Mo were designed to investigate the use of FeS as an alternative to MoS2 for producing Fe-based friction materials. Samples were prepared by powder metallurgy, and their phase compositions, microstructures, mechanical properties, and friction performance were characterized. The results showed that MoS2 reacts with the matrix to produce iron-sulfides and Mo when sintered at 1050A degrees C. Iron-sulfides produced in the MoS2-Fe system were distributed uniformly and continuously in the matrix, leading to optimal mechanical properties and the lowest coefficient of friction among the systems studied. The lubricity observed was hypothesized to originate from the iron-sulfides produced. The FeS-Fe-Mo system showed a phase composition, porosity, and density similar to those of the MoS2-Fe system, but an uneven distribution of iron-sulfides and Mo in this system resulted in less-optimal mechanical properties. Finally, the FeS-Fe system showed the poorest mechanical properties among the systems studied because of the lack of Mo reinforcement. In friction tests, the formation of a sulfide layer contributed to a decrease in coefficient of friction (COF) in all of the samples.

• 出版日期2017-1
• 单位北京科技大学