Abstract Poor wear resistance of rare earth magnesium alloys has prevented them from wider application. In this study, composite coating (PVD carbon coating deposited on electroless plating nickel interlayer) is prepared to protect GW83 magnesium alloys against wear. The Ni + C composite coating has a dense microstructure, improved adhesion strength and hardness due to the effective support of Ni interlayer. The wear test result shows that the Ni + C composite coating can greatly prolong the wear life of the magnesium alloy. The wear track of the Ni + C coated magnesium alloy is obviously narrower and shows less abrasive particles as compared with the bare one. Abrasive wear is the wear mechanism of the coatings at the room temperature. In conclusion, the wear resistance of the GW83 magnesium alloy can be greatly improved by the Ni + C composite coating.

中文翻译：

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化学镀镍夹层碳包覆镁合金的制备、表征及磨损行为

摘要 稀土镁合金耐磨性差，阻碍了其广泛应用。在本研究中，制备复合涂层（沉积在化学镀镍夹层上的 PVD ​​碳涂层）以保护 GW83 镁合金免受磨损。由于Ni夹层的有效支撑，Ni+C复合涂层具有致密的微观结构，提高了附着强度和硬度。磨损试验结果表明，Ni+C复合涂层可以大大延长镁合金的磨损寿命。与裸镁合金相比，Ni+C 涂层镁合金的磨损轨迹明显更窄，磨粒更少。磨粒磨损是涂层在室温下的磨损机制。综上所述，