| ZHAO Jia-qun,LI Liu-he,JING Kai,XU Yi,LIU Hong-tao,LI Guang.Effects of Gradient Interlayers on Wear Resistance of Diamond-like Coatings on Cemented Carbide[J],46(1):82-87 |
| Effects of Gradient Interlayers on Wear Resistance of Diamond-like Coatings on Cemented Carbide |
| Received:August 03, 2016 Revised:January 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.01.014 |
| KeyWord:diamond-like carbon coatings gradient interlayers cemented carbide wear resistance vacuum cathodic arc PECVD |
| Author | Institution |
| ZHAO Jia-qun |
School of Mechanical Engineering & Automation, Beihang University, Beijing , China |
| LI Liu-he |
School of Mechanical Engineering & Automation, Beihang University, Beijing , China |
| JING Kai |
School of Mechanical Engineering & Automation, Beihang University, Beijing , China |
| XU Yi |
School of Mechanical Engineering & Automation, Beihang University, Beijing , China |
| LIU Hong-tao |
School of Mechanical Engineering & Automation, Beihang University, Beijing , China |
| LI Guang |
Institute of Mechanics, Chinese Academy of Sciences, Beijing , China |
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| Abstract: |
| The work aims to analyze the effects of different gradient interlayers on wear resistance of diamond-like coatings (DLC) on cemented carbide and prepare DLC which can improve the wear resistance of cemented carbide significantly. Ti/TiC/DLC, Ti/TiN/DLC, Ti/TiN/TiNC/DLC and Ti/TiN/TiNC/TiC/DLC Ti multielement transitional diamond-like coatings were prepared on cemented carbides by combination of vacuum cathodic arc ion plating and plasma enhanced chemical vapor deposition (PECVD). Bonding strength, tribological property and nano-hardness of different interlayers to diamond-like coatings on cemented carbide were evaluated by GNEHM-150 Rockwell hardness tester, optical microscope (OM), MFT-4000 multi-function tester for material surface and nano hardness tester. The film-substrate bonding strength grade of Ti/TiC/DLC, Ti/TiN/DLC, Ti/TiN/TiNC/DLC and Ti/TiN/TiNC/TiC/DLC was HF3-HF4, HF5-HF6, HF1-HF2 and HF1 respectively; friction coefficient was 0.2 and 0.1 respectively in the frictional wear test performed to two coatings of excellent film-substrate bonding strength (Ti/TiN/TiNC/DLC, Ti/TiN/TiNC/TiC/DLC). Meanwhile, Ti/TiN/TiNC/TiC/DLC coatings were free from obvious peeling after the 60 min rubbing. Type of the gradient interlayer has significant effects on bonding strength and tribological property of DLC, Ti/TiN/TiNC/TiC/DLC coating has the best bonding strength and lowest friction coefficient, showing excellent tribological property and effectively improving the wear resistance of cemented carbide. |
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