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In-situ synthesis of size-tunable silver sulfide nanoparticles to improve tribological properties of the polytetrafluoroethylene-based nanocomposite lubricating coatings
Tribology International ( IF 3.517 ) Pub Date : 2020-03-24 , DOI: 10.1016/j.triboint.2020.106324
Yanjun Ma; Hongqi Wan; Yinping Ye; Lei Chen; Hongxuan Li; Huidi Zhou; Jianmin Chen

Silver sulfide (Ag2S) nanoparticles were prepared by in-situ method, and displayed the small size and good dispersibility in the lubricating coatings. A simple strategy was provided to regulate the size of the Ag2S nanoparticles. The influences of Ag2S nanoparticles and their sizes on the micro-hardness and tribological behaviours of the lubricating coatings were investigated, and the corresponding tribological mechanisms were discussed. Detailed investigation showed that the in-situ synthesized Ag2S nanoparticles dominated by smaller-size and narrower size distribution increased the micro-hardness by 53.39% and reduced wear rate by 26.41%. The friction coefficient was independent to their size and size distribution. The superior tribological performance was attributed to the synergetic roles of the stronger micro-hardness and the high load-carrying tribofilm.
更新日期:2020-03-24

 

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