无机材料学报 ›› 2022, Vol. 37 ›› Issue (7): 764-772.DOI: 10.15541/jim20210616

• 研究论文 • 上一篇    下一篇

电弧离子镀CrAlN-DLC硬质复合薄膜的成分、结构与性能

程玮杰1,2(), 王明磊1,2, 林国强1,2()   

  1. 1.大连理工大学1. 材料科学与工程学院
    2.三束材料改性教育部重点实验室, 大连 116024
  • 收稿日期:2021-10-08 修回日期:2021-11-10 出版日期:2022-07-20 网络出版日期:2021-11-18
  • 通讯作者: 林国强, 教授. E-mail: gqlin@dlut.edu.cn
  • 作者简介:程玮杰(1997-), 男, 硕士研究生. E-mail: 737289840@qq.com
  • 基金资助:
    国家重点研发计划(2016YFB0101318)

Composition, Structure and Properties of CrAlN-DLC Hard Composite Films Deposited by Arc Ion Plating

CHENG Weijie1,2(), WANG Minglei1,2, LIN Guoqiang1,2()   

  1. 1. Material Science and Engineering School, Dalian University of Technology, Dalian 116024, China
    2. Key Laboratory for Material Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
  • Received:2021-10-08 Revised:2021-11-10 Published:2022-07-20 Online:2021-11-18
  • Contact: LIN Guoqiang, professor. E-mail: gqlin@dlut.edu.cn
  • About author:CHENG Weijie (1997-), male, Master candidate. E-mail: 737289840@qq.com
  • Supported by:
    National Key R&D Program of China(2016YFB0101318)

摘要:

为了改善CrAlN薄膜的摩擦性能, 本研究在增强磁过滤脉冲偏压电弧离子镀设备上, 用分离靶弧流调控技术在硬质合金基体上分别制备了不同成分的CrAlN-DLC硬质复合薄膜, 并采用不同手段表征了薄膜的表面形貌、成分、相结构以及力学和摩擦性能。结果表明, 不同成分薄膜表面均平整致密, 膜厚均在1.05 μm左右。随着靶弧流比IC/ICrAl的升高, 薄膜中碳的原子分数由33.1%升至74.6%。薄膜的相结构主要由晶体相和非晶相复合组成, 其晶体相主要为c-(Cr,Al)N相, 且随着碳含量增大晶体相减少、晶粒尺寸减小, 其非晶相主要为DLC, 其中sp2/sp3的比值随碳含量增大而减小。相应地, 薄膜的硬度随着碳含量增大而提高, 当碳的原子分数为74.6%时, 达到最大值(26.2±1.4) GPa, 且该成分点处薄膜摩擦系数也降至最小值0.107, 磨损率仅为3.3×10-9 mm3/Nm。综合而言, 当非晶DLC相最多时, CrAlN-DLC复合薄膜的综合性能达到最佳, 较之CrAlN薄膜, 摩擦性能显著提高。

关键词: 电弧离子镀, 硬质复合薄膜, CrAlN-DLC, 成分, 相结构, 硬度, 摩擦性能

Abstract:

To improve the friction performance of CrAlN film, CrAlN-DLC hard composite films with different compositions were prepared on the cemented carbide substrates using separation target arc current control technology of the enhanced magnetic filter pulsed bias arc ion plating equipment, and their surface morphology, composition, phase structure, mechanical, and friction properties were investigated. The results revealed that the surfaces of different films were flat and dense, and the film thicknesses were all about 1.05 μm. With the increase of target arc current ratio (IC/ICrAl), the carbon atomic content of the film increased from 33.1% to 74.6%. Phase structure of the film was mainly composed of crystal phase and amorphous phase. With the increase of carbon content, the crystal phase of c-(Cr,Al)N decreased and the crystal grain size reduced, besides, the ratio of sp2/sp3 in DLC amorphous phase decreased. Correspondingly, the hardness of the film increased with the increase of carbon content. When the carbon atomic content is 74.6%, the hardness reaches the maximum of (26.2±1.4) GPa, which results in the friction coefficient at this point attaining the minimum value of 0.107, and the wear rate is only 3.3×10-9 mm3/Nm. In summary, the comprehensive performance of the CrAlN-DLC composite film reaches the best when the content of amorphous DLC phase get the maxium, and the friction performance is significantly improved as compared to the CrAlN film.

Key words: arc ion plating, hard composite films, CrAlN-DLC, composition, phase structure, hardness, friction performance

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