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Tribological Properties of Phosphor Bronze and Nanocrystalline Nickel Coatings Under PAO + MoDTC and Ionic Liquid Lubricated Condition

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Abstract

The friction and wear properties of phosphor bronze and nanocrystalline nickel coatings were evaluated using a reciprocating ball-on-plates UMT-2MT sliding tester lubricated with ionic liquid and poly-alpha-olefin containing molybdenum dialkyl dithiocarbamate, respectively. The morphologies of the worn surfaces for the phosphor bronze and nanocrystalline nickel coatings were observed using a scanning electron microscope. The chemical states of several typical elements on the worn surfaces were examined by means of X-ray photoelectron spectroscopy. Results show that the phosphor bronze and nanocrystalline nickel coatings exhibited quite different tribological behaviors under different lubricants. Phosphor bronze plate shows higher friction coefficient (0.14) and wear rate (3.2 × 10−5 mm3/Nm) than nanocrystalline nickel coatings (average friction coefficient is 0.097, wear rate is 1.75 × 10−6 mm3/Nm) under poly-alpha-olefin containing molybdenum dialkyl dithiocarbamate lubricated conditions. The excellent tribological performance of nanocrystalline nickel coatings under above lubricant can be attributed to the formation of MoS2 and MoO3 on the sliding surface. a quite a number of C, O and F products on worn surface of phosphor bronze than NC nickel coatings can improve anti-wear properties while using ionic liquid as lubricant.

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Acknowledgments

The authors thank the financial support of this work by China National 973 Program (2007CB607601) and Hundreds Talent Program of Chinese Academy of Sciences for financial support of this research work. The authors also thank Jiazheng Zhao and Bo Wang for their help with the SEM and XPS analysis.

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  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, The Chinese Academy of Science, Lanzhou, 730000, China

    Yanqiu Xia, Liping Wang, Xuqing Liu & Yulin Qiao

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  1. Yanqiu Xia
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  2. Liping Wang
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Correspondence to Yanqiu Xia.

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Xia, Y., Wang, L., Liu, X. et al. Tribological Properties of Phosphor Bronze and Nanocrystalline Nickel Coatings Under PAO + MoDTC and Ionic Liquid Lubricated Condition. Tribol Lett 31, 149–158 (2008). https://doi.org/10.1007/s11249-008-9347-9

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  • DOI: https://doi.org/10.1007/s11249-008-9347-9

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