含氢 WC/ C 复合涂层在不同润滑油环境的摩擦性能

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含氢 WC/ C 复合涂层在不同润滑油环境的摩擦性能
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作者单位:兰州交通大学机电工程学院
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中图分类号:TB3
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Tribological Properties of Hydrogenated WC/ C Multilayer Coating UnderDifferent Lubricating Oil Conditions

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摘要:

利用非平衡磁控溅射技术,通过同时离化乙炔气体和共溅射石墨靶与碳化钨靶,在 304 不锈钢和

单晶硅基底上沉积具有 Cr 过渡层和 WC 过渡层的含氢 WC/ C 复合涂层。采用扫描电镜、Raman 光谱仪、X 射

线衍射仪、纳米压痕仪等对涂层的微观结构、力学性能进行分析。利用 Rtec 摩擦磨损试验机对 WC/ C 复合涂

层与 304 不锈钢基底在 PAO 基础润滑油环境、发动机润滑油环境以及腐蚀性发动机润滑油环境进行摩擦性能

测试。结果表明:涂层内含有较多类石墨 sp 2 键,WC 1-x 相镶嵌在非晶碳基质中构成多相复合结构;涂层的硬度

和弹性模量明显高于 304 不锈钢基底,且其 H/ E 值远高于基底;与 304 不锈钢基底相比,在三种润滑油环境下

涂层均具有较低的摩擦因数和磨损率。

Abstract:

Hydrogenated WC/ C multilayer coating was deposited by unbalanced sputtering technology. It was

produced by isolating the acetylene gas, sputtering the graphite target and tungsten carbide target at the same time. A

Cr translation layer and a WC translation layer were arranged for the coating on 304 stainless steel or silicon wafers.

The microstructure and mechanical properties of coatings were analyzed by scanning electron microscope(SEM), Ra-

man spectrometer, X-ray diffractometer (XRD) and nanoidenter. Rtec friction tester was used to investigate the tribo-

logical properties of coating under PAO base oil, engine oil and corrosive engine oil. The results indicate that plentiful

graphite-like sp 2 bonds were formed in the coating. It has the multiphase composite structure in which WC 1-x phase is

embedded in the amorphous carbon. Compared with 304 stainless steel, WC/ C coating has higher hardness, elastic

modulus and the value of H/ E significantly. Besides, the coating exhibits lower friction coefficients and wear rates

than base materials under three kinds of lubricating oil conditions.

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王顺花.含氢 WC/ C 复合涂层在不同润滑油环境的摩擦性能[J].宇航材料工艺,2015,45(6).

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