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The antiwear ability of the di-n-hexadecyldithiophosphate (DDP) coated PbS nanoparticles as additive in liquid paraffin at ambient temperature was investigated using a four-ball machine. The performance of the prepared nano-particles as solid lubricant from room temperature to 773 K was examined with a ball-on-block tribometer. The lubricating mechanisms were discussed along with the analyses results...
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