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Materials 2018, 11(5), 758; https://doi.org/10.3390/ma11050758

Design and Performance of Property Gradient Ternary Nitride Coating Based on Process Control

Key Laboratory of Fundamental Science for Advanced Machining, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
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Received: 14 March 2018 / Revised: 5 April 2018 / Accepted: 5 April 2018 / Published: 9 May 2018
(This article belongs to the Section Thin Films)
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Abstract

Surface coating is an effective approach to improve cutting tool performance, and multiple or gradient coating structures have become a common development strategy. However, composition mutations at the interfaces decrease the performance of multi-layered coatings. The key mitigation technique has been to reduce the interface effect at the boundaries. This study proposes a structure design method for property-component gradient coatings based on process control. The method produces coatings with high internal cohesion and high external hardness, which could reduce the composition and performance mutations at the interface. A ZrTiN property gradient ternary nitride coating was deposited on cemented carbide by multi-arc ion plating with separated Ti and Zr targets. The mechanical properties, friction behaviors, and cutting performances were systematically investigated, compared with a single-layer coating. The results indicated that the gradient coating had better friction and wear performance with lower wear rate and higher resistance to peeling off during sliding friction. The gradient coating had better wear and damage resistance in cutting processes, with lower machined surface roughness Ra. Gradient-structured coatings could effectively inhibit micro crack initiation and growth under alternating force and temperature load. This method could be extended to similar ternary nitride coatings. View Full-Text
Keywords: property gradient; gradient coating; process control; friction and wear; cutting performance; wear mechanism property gradient; gradient coating; process control; friction and wear; cutting performance; wear mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yan, P.; Chen, K.; Wang, Y.; Zhou, H.; Peng, Z.; Jiao, L.; Wang, X. Design and Performance of Property Gradient Ternary Nitride Coating Based on Process Control. Materials 2018, 11, 758.

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