Mechanical, oxidation, and cutting properties of AlCrN/AlTiSiN nano-multilayer coatings

The design of multilayered structure is a promising way to tailor the microstructure and properties of the hard coatings. In this study, AlCrN, AlTiSiN and nano-multilayer AlCrN/AlTiSiN coatings were deposited and their microstructure, mechanical, oxidation and cutting properties were comparatively...

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Bibliographic Details
Published in:Surface & coatings technology 2022-03, Vol.433, p.128094, Article 128094
Main Authors: Xiao, Baijun, Zhang, Teng Fei, Guo, Zhu, Li, Zhou, Fan, Bin, Chen, Ganxin, Xiong, Zhihong, Wang, Qimin
Format: Article
Language:English
Subjects:
Adhesive strength
AlCrN/AlTiSiN coating
Coatings
Cutting
Cutting performance
Diffusion barriers
Hardness
Mechanical properties
Microstructure
Multilayers
Nano-multilayer
Oxidation
Oxidation resistance
Scale (corrosion)
Tool life
Turning (machining)
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Summary:The design of multilayered structure is a promising way to tailor the microstructure and properties of the hard coatings. In this study, AlCrN, AlTiSiN and nano-multilayer AlCrN/AlTiSiN coatings were deposited and their microstructure, mechanical, oxidation and cutting properties were comparatively investigated. The results showed that the AlCrN/AlTiSiN coating, possessing two phase and denser microstructure, showed improved hardness (39.4 GPa) and adhesion strength, as compared with the AlCrN and AlTiSiN coatings. The AlCrN/AlTiSiN coating also exhibited excellent oxidation resistance up to 1000 °C and its oxidation scale was composed of a thin and dense Al-rich oxide, due to the multilayer structure acted as an effective barrier to block elemental diffusion to retard the oxidation process. In the turning tests for SKD11, the AlCrN/AlTiSiN coating demonstrated good tool life (~800 m), which should be attributed to its higher hardness, good adhesion strength and oxidation resistance, as compared with the monolithic AlCrN and AlTiSiN coatings. •AlCrN/AlTiSiN coating showed higher hardness (39.4 GPa) than monolayer coatings.•AlCrN/AlTiSiN coating showed superior oxidation resistance than AlTiSiN coating.•The multilayer structure acted as barrier to block oxidation diffusion process.•The AlCrN/AlTiSiN-coated tool had the longest cutting life of ~800 m.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2022.128094