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Low-Friction MoS x Coatings Resistant to Wear in Ambient Air of Low and High Relative Humidity

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Abstract

The investigation of the tribological performance of MoS2-based coatings in air of high humidity is critical for the future use of such low-friction and high-wear-resistant coatings in ambient air. Sulfur-deficient MoS x coatings with a basal plane (x = 1.3) and a random (x = 1.8) crystallographic orientation were produced by planar magnetron sputtering. The coefficient of friction and the wear loss of MoSx coatings in comparison with TiN and amorphous TiB2 coatings were investigated in bi-directional sliding fretting tests performed in ambient air of different relative humidity. The wear rate expressed as a volumetric loss per unit of dissipated energy was determined. From these results, the best friction and wear performance was achieved with basal-plane-oriented MoS x coatings tested at a relative humidity in the range of 10-50%. A coefficent of friction of 0.06-0.08 and a wear rate of 4 × 103 μm3J-1, at a normal load of 1 N and a fretting frequency of 10 Hz, were recorded for that type of MoS x coatings.

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Authors and Affiliations

  1. Dept. MTM, Katholieke Universiteit Leuven, B-3001, Leuven, Belgium

    Xiaoling Zhang, B. Prakash & J.-P. Celis

  2. WTCM, B-3590, Diepenbeek, Belgium

    W. Lauwerens & Xiaodong Zhu

  3. State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, 710049, Xi'an, P R China

    Xiaoling Zhang, Xiaodong Zhu & Jiawen He

  4. School of Material Science and Engineering, Shandong University, 250061, Jinan, P.R. China

    Xiaoling Zhang

Authors
  1. Xiaoling Zhang
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  2. B. Prakash
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  3. W. Lauwerens
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  4. Xiaodong Zhu
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  5. Jiawen He
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  6. J.-P. Celis
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Zhang, X., Prakash, B., Lauwerens, W. et al. Low-Friction MoS x Coatings Resistant to Wear in Ambient Air of Low and High Relative Humidity. Tribology Letters 14, 131–135 (2003). https://doi.org/10.1023/A:1021760405423

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  • DOI: https://doi.org/10.1023/A:1021760405423

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