Low-cost solid FeS lubricant as a possible alternative to MoS2 for producing Fe-based friction materials
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- 作者：Tao Peng ; Qing-zhi Yan ; Yan Zhang…
- 关键词：friction materials ; solid lubricants ; iron sulfides ; molybdenum sulfides
- 刊名：International Journal of Minerals, Metallurgy, and Materials
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：24
- 期：1
- 页码：115-121
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Materials Science, general; Metallic Materials; Characterization and Evaluation of Materials; Ceramics, Glass, Composites, Natural Materials; Surfaces and Interfaces, Thin Films; Tribology, Corrosion
- 出版者：University of Science and Technology Beijing
- ISSN：1869-103X
- 卷排序：24
文摘
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 1050°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.