Enhanced Friction and Wear Properties of TiN/MoS2 Composite Coating on the Surface of Plasma Nitrided Ti6Al4V Alloy

In this study, plasma nitriding and multi-arc ion plating techniques were employed to enhance the load-bearing capacity of the TC4 alloy. The tribological properties were characterized, and the mechanisms were discussed in detail. Subsequently, the tribological properties of the coating enhanced with MoS2 were then evaluated, and the results indicated that the plasma nitriding treatment, which exhibited optimal friction performance, resulted in the formation of a nitrided layer with a thickness of 98 µm on the surface of the TC4 alloy, thereby significantly improving its mechanical properties. Furthermore, the TiN coating samples treated with plasma nitriding demonstrated superior mechanical properties, achieving the highest hardness value (20 GPa), high load-carrying capacity (58 N) and the lowest wear rate (9.16 × 10−6 mm3 ·N−1 ·m−1 ). Moreover, the tribological properties of MoS2 deposited on the surface of the PN-2/TiN sample were significantly enhanced, which can be attributed to the synergistic effect of the excellent load-bearing characteristics of the plasma nitriding treatment and the wear resistance of the TiN layer. This study investigates the factors contributing to the superior tribological performance of the PN-2/TiN sample and the extended friction lifetime of the PN-2/TiN/MoS2 sample. The composite coating provides a new method to improve the anti-friction of soft metals, especially titanium alloys, and is expected to be applied in the aerospace field.本研究采用等离子体渗氮（plasma nitriding）与多弧离子镀（multi-arc ion plating）技术，以提升TC4合金（TC4 alloy）的承载能力（load-bearing capacity）。对试样的摩擦学性能（tribological properties）进行了表征，并对其作用机理（mechanisms）展开了详细探讨。随后，针对经二硫化钼（MoS₂）增强的涂层，本研究进一步评估了其摩擦学性能，结果显示：表现出最优摩擦性能的等离子体渗氮处理，可在TC4合金表面形成厚度为98 μm的渗氮层（nitrided layer），进而显著改善其力学性能。此外，经等离子体渗氮处理的氮化钛（TiN）涂层试样展现出更优异的力学性能：其最高硬度值（hardness value）达20 GPa，承载能力为58 N，且磨损率（wear rate）最低（9.16 × 10⁻⁶ mm³·N⁻¹·m⁻¹）。进一步而言，在PN-2/TiN试样表面沉积二硫化钼后，其摩擦学性能得到显著提升，这一现象可归因于等离子体渗氮处理优异的承载特性与氮化钛层的耐磨性（wear resistance）的协同效应（synergistic effect）。本研究剖析了PN-2/TiN试样具备优异摩擦学性能的原因，以及PN-2/TiN/MoS₂试样更长摩擦寿命（friction lifetime）的内在机制。该复合涂层为改善软金属（尤其是钛合金）的抗摩擦性能提供了新途径，有望应用于航空航天领域。

搜集汇总

背景与挑战

背景概述

该数据集研究TiN/MoS2复合涂层在等离子氮化Ti6Al4V合金表面的摩擦磨损性能增强。通过等离子氮化和多弧离子镀技术，涂层表现出高硬度（20 GPa）、高承载能力（58 N）和低磨损率（9.16×10⁻⁶ mm³·N⁻¹·m⁻¹），MoS2的沉积进一步提升了摩擦寿命。该复合涂层为改善软金属（尤其是钛合金）的减摩性能提供了新方法，有望应用于航空航天领域。