Abstract
The solid lubricant that is coated on a flat surface is easily removed during friction. Surface texture dimples, which act as reservoirs of solid lubricant, can prolong the wear life of solid lubricant films. We textured silver-containing nickel-based alloys by a pulse laser and filled the micro-dimples with molybdenum disulfide powders. The tribological properties of the alloys were tested by rubbing against alloyed steel on a ring-on-disk tribometer at temperatures ranging from room temperature to 600°C . After laser surface texturing, the friction coefficients of the silver-containing nickel-based alloy smeared with molybdenum disulfide powders were reduced at temperatures ranging from room temperature to 400°C. With increasing dimple density, the wear life of the MoS2 film increased while the wear rate of the nickel-based alloy decreased. The wear life of the textured surface with a dimple density of 11.2% exceeded 10,000 m at room temperature. We conclude that molybdenum disulfide and its oxides stored in the micro-dimples play a role in lubrication at room temperature and high temperatures, respectively.
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The study is supported by Natural Science Foundation of China (No.51041001) and NUST Research Funding (2010ZYTS088 and 2010GJPY032).
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Li, J., Xiong, D., Zhang, Y. et al. Friction and Wear Properties of MoS2-Overcoated Laser Surface-Textured Silver-Containing Nickel-Based Alloy at Elevated Temperatures. Tribol Lett 43, 221–228 (2011). https://doi.org/10.1007/s11249-011-9797-3
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DOI: https://doi.org/10.1007/s11249-011-9797-3