| 氮化钒(VN)涂层在不同载荷下的摩擦磨损行为 |
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| 引用本文： | 许蓓蓓,王振玉,郭鹏,帅锦涛,叶羽敏,汪爱英,柯培玲.氮化钒(VN)涂层在不同载荷下的摩擦磨损行为[J].摩擦学学报,2020,40(5):656-663. |
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| 作者姓名： | 许蓓蓓 王振玉 郭鹏 帅锦涛 叶羽敏 汪爱英 柯培玲 |
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| 作者单位： | 1.宁波大学 材料科学与化学工程学院，浙江 宁波 315211 |
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| 基金项目： | 国家科技重大专项(2017-VII-0013-0110)，国家自然科学基金项目(51875555, 51901238)和宁波市自然科学基金(202003N4025)资助 |
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| 摘 要： | 采用真空阴极电弧离子镀方法制备氮化钒(VN)涂层，并研究了VN涂层的结构、力学性能以及不同载荷对摩擦磨损行为的影响. 结果表明:VN涂层结构致密并呈柱状方式生长，其晶体类型为NaCl-型面心立方结构. 涂层具有强的膜基结合力以及良好的摩擦学性能. 随着载荷增加，VN涂层的摩擦系数降低，而磨损率增加. 基于赫兹弹性接触模型以及摩擦产物的成分分析结果，发现载荷越大，界面接触应力越大，界面摩擦化学反应越剧烈，这有利于降低剪切应力并促进V元素氧化生成V2O5润滑相，导致摩擦系数降低. 此外，因韧性不足、抗塑性变形能力弱等原因，随载荷增加，涂层磨损率增大.
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| 关 键 词： | VN涂层 载荷 赫兹接触应力 V2O5润滑相 |
| 收稿时间： | 2020-01-13 |
Friction Behavior of VN Coating under Different Loads |
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| Institution: | 1.Faculty of Materials Science and Chemical Engineering, Ningbo University, Zhejiang Ningbo 315211, China2.Zhejiang Key Laboratory of Marine Materials of Protective Technologies, a. Key Laboratory of Marine Materials and Related Technologies, b. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo 315201, China |
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| Abstract: | The vanadium nitride (VN) coating was prepared by cathodic arc evaporation system, and the structure, mechanical properties as well as the effect of load on friction behaviors of VN coating was characterized. As a result, the VN coating grew in a dense columnar structure and exhibited NaCl-type face centered cubic structure. Coupled with excellent adhesion strength, the coating also presented good tribological properties. With an increasing load, the friction coefficient of VN coating decreased, while the wear rate increased. According to the Hertzian elastic contact model and the analyzed results of wear debris, it was found that the heavier the load, the greater the interface contact pressure, and the tribo-chemical reaction caused by the heavy load was more intensity. This was benefit of reducing the shear stress and inducing more V element to oxidize as well as generating V2O5 lubricating phase, which led to the decreased friction coefficient. Moreover, due to insufficient toughness and poor resistance to plastic deformation, the wear rate of the coating increased with increasing load. |
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