Abstract The micro-texture fabricated on the substrate surface of coatings is an established method for enhancing the Physical Vapor Deposition (PVD) coatings adhesion. Currently, laser micromachining is widely used to prepare the micro-texture. Nevertheless, it suffers from the problem of low fabrication quality, such as irregular texture edges and irregular protrusions inside the textures. Meanwhile, to achieve sufficient coating adhesion, the improvement of physical-chemical bonding between coatings and substrate is crucial. Here, we propose a plasma-assisted laser machining approach to fabricate micro-texture, and the effect of plasma/laser textures on the interfacial properties of PVD tool coatings, especially the physical-chemical bonding interfaces is revealed for the first time. The micro-topography, chemical structure and wettability of the plasma/laser textured substrate surface were investigated. The scratch tests on the coatings with different pretreated substrates and dry cutting experiments of stainless steel were carried out. Results show that the plasma/ laser textured substrate was conducive to coatings in terms of wettability, phase composition, roughness and hardness, and specific surface area, which could enhance the interfacial properties of PVD coatings. Thus, the critical load of plasma/laser textured coatings (FN, C2 = 103 N) exhibited higher values compared to that of the untextured one (FN, C2 = 70 N), and an obviously reduction in cutting force of FX up to 34.82 %, FY up to 36.15 %, FZ up to 27.71 % by plasma/laser textured coated tool was achieved. Furthermore, the mechanisms for the effects of plasma/laser textures on the coating adhesion were discussed.

中文翻译：

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等离子辅助激光加工在硬质合金基体表面制备微纹理以增强 PVD ​​刀具涂层的附着力

摘要 在涂层基材表面制造微纹理是提高物理气相沉积（PVD）涂层附着力的一种既定方法。目前，激光微加工被广泛用于制备微纹理。然而，它存在制造质量低的问题，例如不规则的纹理边缘和纹理内部的不规则突起。同时，要获得足够的涂层附着力，涂层与基材之间物理化学结合的改善至关重要。在这里，我们提出了一种等离子体辅助激光加工方法来制造微纹理，并首次揭示了等离子体/激光纹理对 PVD ​​工具涂层界面性能的影响，尤其是物理-化学键合界面。微地形，研究了等离子体/激光纹理化衬底表面的化学结构和润湿性。对不同预处理基体的涂层进行了划痕试验和不锈钢干切削实验。结果表明，等离子体/激光纹理化基底在润湿性、相组成、粗糙度和硬度以及比表面积方面有利于涂层，这可以增强PVD涂层的界面性能。因此，等离子/激光纹理涂层 (FN, C2 = 103 N) 的临界载荷与未纹理涂层 (FN, C2 = 70 N) 相比表现出更高的值，并且 FX 的切削力明显降低至 34.82 %，FY 高达 36.15 %，FZ 高达 27.71 %，通过等离子/激光纹理涂层工具实现。此外，