• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2015, Vol. 51 ›› Issue (23): 96-102.doi: 10.3901/JME.2015.23.096

• 摩擦学 • 上一篇    下一篇

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喷涂功率对NiCr-Cr3C2涂层表面自由能及其摩擦性能的影响

李楠楠1,  康嘉杰2,  王海斗3,  董天顺1,  许中林1,  李国禄1   

  1. 1. 河北工业大学材料科学与工程学院  天津  300130;
    2. 中国地质大学(北京)工程技术学院  北京  100083;
    3. 装甲兵工程学院装备再制造技术国防科技重点实验室  北京  100072
  • 收稿日期:2014-12-12 修回日期:2015-05-26 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: 李国禄,男,1966年出生,博士,教授。主要研究方向为表面工程与摩擦学。 E-mail:liguolu0305@163.com
  • 作者简介:李楠楠,男,1989年出生。主要研究方向为表面工程。 E-mail:lnnhblf@126.com
  • 基金资助:
    国家自然科学基金(51275151)、国家重点基础研究发展计划(973计划,2011CB013405)和国家杰出青年科学基金(51125023)资助项目

Influence of Spraying Powers on Surface Free Energy and Tribological Properties of NiCr-Cr3C2 Coating

LI Nannan1,  KANG Jiajie2,  WANG Haidou3,  DONG Tianshun1,  XU Zhonglin1,  LI Guolu1   

  1. 1. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130;
    2. School of Engineering and Technology, China University of Geosciences, Beijing 100083;
    3. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072
  • Received:2014-12-12 Revised:2015-05-26 Online:2015-12-05 Published:2015-12-05

摘要: 利用超音速等离子喷涂技术制备了不同喷涂功率条件下的NiCr-Cr3C2涂层,结合表面自由能理论研究了其表面摩擦学性能。利用Owens-Wendt几何平均法计算了涂层的表面自由能及其分量。对比发现,涂层孔隙率、显微硬度和摩擦因数均随着喷涂功率的变化而变化,且其变化趋势与极性分量均表现出一定的相似性。分析表明,受喷涂功率的影响,喷涂粒子的温度和速度对涂层表面分子间作用力产生影响,从而间接改变了涂层表面的自由能,并且自由能及其分量的改变,会直接影响NiCr-Cr3C2涂层表面的摩擦学特性。

关键词: NiCr-Cr3C2涂层, 表面自由能, 超音速等离子喷涂, 摩擦学性能

Abstract: The NiCr-Cr3C2 coatings are prepared by the supersonic plasma spraying under different spraying powers and the tribological properties are studied with surface free energy theory. By measuring the contact angles of the coating, the surface free energy and its components are calculated by the Owens-Wendt geometric mean method. By comparing the analysis, it finds that the porosity, micro-hardness and friction coefficient of the coating change as the spraying power, and the trend shows a certain similarity with the polar component. The analysis result indicates that the intermolecular force of surface is affected by the temperature and velocity of the flying particles under different spraying power. That indirectly changes the surface free energy and its components. When the change happened, the tribological properties of NiCr-Cr3C2 coating will be affected directly.

Key words: NiCr-Cr3C2 coatings, supersonic plasma spraying, surface free energy, tribological property