Based on the high-power and high-flow mode of the three-cathode high-energy plasma spray system, Mo coatings were prepared on the surface of 15-5PH steel, and the effects of different auxiliary gas (helium) flow parameters on the micro-morphology and properties of the coating were studied. X-ray diffraction (XRD), scanning electron microscope (SEM), micro-hardness tester, universal testing machine, and friction and wear testing machine were used to characterize the phase composition, micro-morphology, micro-hardness, combining strength and tribological properties of the coating. The results showed that the surface of the Mo coating prepared by high-energy plasma spraying had visible pit shapes. The coating porosity gradually decreased along with the thickness of the coating, showing a typical tamping morphology. Due to the breakneck flying speed and deposition speed of powder particles, no apparent oxidation phenomenon was observed in the coating. With the increase of auxiliary gas flow, the tamping effect of the powder particles on the coating increased, and the density, hardness, and bonding strength of the coating increased. With the increase of auxiliary gas flow, the wear rate of the coating decreased, and the wear mechanism of the coating gradually changed from abrasive wear to adhesive wear.

基于三阴极高能等离子喷涂系统的高功率高流量模式，在15-5PH钢表面制备了Mo涂层，以及不同的辅助气体（氦气）流动参数对合金的影响。研究了涂层的微观形貌和性能。使用X射线衍射（XRD），扫描电子显微镜（SEM），显微硬度测试仪，通用测试仪以及摩擦磨损测试仪来表征相组成，微观形貌，显微硬度，强度和摩擦学涂层的性能。结果表明，通过高能等离子喷涂制备的Mo涂层表面具有可见的凹坑形状。涂层的孔隙率随着涂层的厚度而逐渐降低，显示出典型的捣固形态。由于粉末颗粒的飞速飞行和沉积速度，在涂层中未观察到明显的氧化现象。随着辅助气流的增加，粉末颗粒对涂层的捣固作用增强，并且涂层的密度，硬度和粘结强度提高。随着辅助气体流量的增加，涂层的磨损率降低，涂层的磨损机理逐渐从磨料磨损变为胶粘剂磨损。