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<p>The influence of the deposition mode and test conditions on the structure and tribological properties of cathodic-arc MoN coatings was investigated. At bias voltages in the range from −30 to −70 V, 10 μm thick coatings based on hexagonal molybdenum nitride δ‑MoN with high nanohardness (up to 34.7 GPa) and elastic modulus (up to 471 GPa) are formed on a&#xa0;15Kh12VNMF steel substrate. Tests of “coated plate–ball” tribopairs using ∅ 10 mm ceramic (Al<sub>2</sub>O<sub>3</sub>) and steel (ShKh15) balls without and with 10 μm thick CrN, TiN and MoN coatings show that the coating deposited at a&#xa0;bias voltage of −70 V has the best properties; the “plate with MoN coating–ball with TiN coating” pair is optimal by the tribological characteristics at 20 °C. At 500 °C the wear resistance of the MoN coating decreases rapidly, which is associated with its thermal instability and transformation into molybdenum oxide under the influence of contact stresses.</p>

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Structure and tribological properties of MoN cathodic-arc coating

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • I. O. Klimenko,
  • V. A. Belous,
  • V. Ya. Podhurska,
  • M. M. Shved,
  • G. M. Tolmachova,
  • I. V. Kolodiy,
  • V. D. Ovcharenko,
  • M. G. Ishchenko,
  • I. M. Babayev,
  • O. S. Kuprin

摘要

The influence of the deposition mode and test conditions on the structure and tribological properties of cathodic-arc MoN coatings was investigated. At bias voltages in the range from −30 to −70 V, 10 μm thick coatings based on hexagonal molybdenum nitride δ‑MoN with high nanohardness (up to 34.7 GPa) and elastic modulus (up to 471 GPa) are formed on a 15Kh12VNMF steel substrate. Tests of “coated plate–ball” tribopairs using ∅ 10 mm ceramic (Al2O3) and steel (ShKh15) balls without and with 10 μm thick CrN, TiN and MoN coatings show that the coating deposited at a bias voltage of −70 V has the best properties; the “plate with MoN coating–ball with TiN coating” pair is optimal by the tribological characteristics at 20 °C. At 500 °C the wear resistance of the MoN coating decreases rapidly, which is associated with its thermal instability and transformation into molybdenum oxide under the influence of contact stresses.