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Improvement of Wear Performance of Nano-Multilayer PVD Coatings under Dry Hard End Milling Conditions Based on Their Architectural Development

Department of Mechanical Engineering, McMaster University, 1280 Main St. West, Hamilton, ON L8S4L7, Canada
Micro Materials Limited, Willow House, Yale Business Village, Ellice Way, Wrexham LL13 7YL, UK
Materials Research Laboratory, Kobe Steel Ltd., 1-5-5 Takatsuda-dai, Nishi-ku, Kobe, Hyogo 651-2271, Japan
LMA-Laboratory of Advanced Microscopy, INA—Institute of Nanoscience of Aragón, University of Zaragoza, E-50018 Zaragoza, Spain
Department of Physics Condensed Matter, University of Zaragoza, E-50009 Zaragoza, Spain
Author to whom correspondence should be addressed.
Coatings 2018, 8(2), 59;
Received: 14 December 2017 / Revised: 19 January 2018 / Accepted: 1 February 2018 / Published: 5 February 2018
(This article belongs to the Special Issue Coatings for Cutting Tools)
The TiAlCrSiYN-based family of PVD (physical vapor deposition) hard coatings was specially designed for extreme conditions involving the dry ultra-performance machining of hardened tool steels. However, there is a strong potential for further advances in the wear performance of the coatings through improvements in their architecture. A few different coating architectures (monolayer, multilayer, bi-multilayer, bi-multilayer with increased number of alternating nano-layers) were studied in relation to cutting-tool life. Comprehensive characterization of the structure and properties of the coatings has been performed using XRD, SEM, TEM, micro-mechanical studies and tool-life evaluation. The wear performance was then related to the ability of the coating layer to exhibit minimal surface damage under operation, which is directly associated with the various micro-mechanical characteristics (such as hardness, elastic modulus and related characteristics; nano-impact; scratch test-based characteristics). The results presented exhibited that a substantial increase in tool life as well as improvement of the mechanical properties could be achieved through the architectural development of the coatings. View Full-Text
Keywords: PVD coatings; bi-multilayer coatings; cutting tools PVD coatings; bi-multilayer coatings; cutting tools
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Chowdhury, S.; Beake, B.D.; Yamamoto, K.; Bose, B.; Aguirre, M.; Fox-Rabinovich, G.S.; Veldhuis, S.C. Improvement of Wear Performance of Nano-Multilayer PVD Coatings under Dry Hard End Milling Conditions Based on Their Architectural Development. Coatings 2018, 8, 59.

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