为提高海洋装备摩擦零部件的摩擦学性能,采用多弧离子镀技术在316L不锈钢上制备了CrN/CrAlSiN涂层.通过XRD、XPS表征涂层的物相及成分,SEM和TEM表征涂层的形貌和微观结构,并用纳米压痕仪测试其硬度,采用摩擦磨损试验机对涂层在大气和海水环境中的摩擦磨损性能进行测试.结果表明:CrN/CrAlSiN涂层的微观结构主要有CrN相、AlN相以及非晶态Si3N4包裹CrN、AlN相,(111)择优取向最为明显;基于微观结构与CrN过渡层的设计,CrAlSiN涂层硬度高达35.5 GPa;较之于316L基底,涂层致密的结构使其在海水环境下表现出更好的耐腐蚀性能;在大气和海水环境下,CrN/CrAlSiN涂层的摩擦因数及磨损率均明显降低,在海水环境下达到最优.
To improve the tribological performance of sea frictional components,CrN/CrAlSiN coating was deposited on 316L stainless steel by multi-arc ion plating technique.The composition and microstructures of the coatings were characterized by XRD,XPS,SEM and TEM.The hardness of the coatings was measured using nanoindentation.The friction and wear properties of the coatings were investigated using a ball-on-disk tribometer in the atmosphere and seawater.The results show that the synthesized CrN/CrAlSiN coating exhibits nanostructured composite microstructures consisting of CrN,AlN and amorphous Si3N4 encapsulated nano-crystallite with a stronger (111) preferred orientation.Based on the design of intermediate layer of the CrN/CrAlSiN coating,the hardness of the coating amount to 35.5 GPa.With respect to the 316L substrate,the coating has a good corrosion resistance due to its dense structure.In the atmosphere and seawater environments,the friction coefficient and wear rate of the CrN/CrAlSiN coating significantly reduce compared to 316L,which is in the optimum state in the seawater.
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