Studies on the application of laser surface texturing to improve the tribological performance of AlCrSiN-Coated surfaces
Studies on the application of laser surface texturing to improve the tribological performance of AlCrSiN-Coated surfaces
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应用激光表面毛化改善AlCrSiN涂层表面摩擦学性能的研究
DOI：
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发表时间：
2012
影响因子：
3.5
通讯作者：
Sang
中科院分区：
文献类型：
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作者：
Bom;Woowon Chung;M. Rhee;Sang
近年来，激光织构在改善各种表面的摩擦学性能方面受到了广泛的关注，这种表面的激光织构可以用于改善PVD涂层表面的摩擦学性能。本文在H13基体上进行了两种不同的激光表面织构，并在织构后的H13试样上采用非平衡磁控溅射制备了不同N2含量的PVD AlCrSiN涂层。采用x射线衍射仪（XRD）、原子力显微镜（AFM）、显微硬度仪和磨损试验研究了涂层的晶体结构、表面形貌、硬度和摩擦系数随N2分压的变化规律。采用不平衡磁控溅射法制备了不同氮含量的AlCrSiN薄膜。从合成的薄膜中可以观察到致密紧凑的微观结构以及非常光滑的表面，这可能是由于在AlCrN薄膜中添加了Si，使薄膜中产生了非晶相。AlCrSiN膜的硬度随N2分压的增加而增加，在N2分压为0.16 Pa时合成的AlCrSiN膜的最大硬度约为33 GPa。在室温无润滑条件下对Al2O3对应球的磨损试验中，无织构AlCrSiN膜的平均摩擦系数从0.42降至0.38，而蜂窝织构AlCrSiN膜的平均摩擦系数降至0.36。在AlCrSiN薄膜上进行激光表面织构可使摩擦系数降低约15%以上，通过优化蜂窝状织构表面可以进一步改善织构表面的摩擦学性能。
Recently, laser texturing has received lots of attention for improving the tribological performance of various surfaces, and this laser texturing of surfaces could be applied to improve the tribological performance of PVD coated surfaces. In this work two different patterns of laser surface texturing were performed on H13 substrate, and PVD AlCrSiN coatings with various N2 contents were made by unbalanced magnetron sputtering on the textured H13 specimens. The coating characteristics such as crystalline structure, surface morphology, hardness, and friction coefficient of the coatings as a function of the N2 partial pressure were investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), microhardness tester, and wear test. Synthesis of the AlCrSiN thin films containing various N2 contents was successful using the unbalanced magnetron sputtering process. A dense and compact microstructure, as well as a very smooth surface, were observed from the synthesized thin films, which could be attributed to the addition of Si into the AlCrN films, producing an amorphous phase in the films. Also the hardness of the AlCrSiN films increased with increasing N2 partial pressures and the maximum hardness of approximately 33 GPa was measured from the AlCrSiN film synthesized with N2 partial pressures of 0.16 Pa. From the wear tests against an Al2O3 counterpart ball at room temperature without lubrication, the average friction coefficient of the non-textured AlCrSiN films of 0.42 was decreased to 0.38 and 0.36 for dimple-textured and honeycomb-textured AlCrSiN films, respectively. Laser surface texturing on the AlCrSiN films reduced the friction coefficients by approximately more than 15%, and further improvement on the tribological performance of the textured surfaces could be possible by optimizing the honeycomb-textured surfaces.