Effect of arc current on microstructure and mechanical properties of CrN coatings deposited by arc ion plating

CrN coatings were deposited on the Ti-6Al-4V substrate by arc ion plating process. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the microstructure of deposited CrN coatings. Mechanical properties of deposited CrN coatings...

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Bibliographic Details
Published in:Hang kong cai liao xue bao 2011-08, Vol.31 (4), p.51-55
Main Authors: Zheng, Chen-Chao, Chen, Kang-Min, Zhang, Xiao-Ning, Huang, Yan, Guan, Qing-Feng, Gong, Lei, Sun, Chao
Format: Article
Language:Chinese
Subjects:
Arc deposition
Chromium nitride
Coatings
Deposition
Friction
Mechanical properties
Microstructure
Scanning electron microscopy
Titanium base alloys
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Summary:CrN coatings were deposited on the Ti-6Al-4V substrate by arc ion plating process. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the microstructure of deposited CrN coatings. Mechanical properties of deposited CrN coatings were also measured. The results show that the deposition rate of CrN coatings increases, the number and the size of macro-particles also increase, and the surfaces of the coatings become rough significantly with the increase of arc current. Single-phase CrN coatings were deposited with different arc current. The changing of arc current affects the bombardment of electrical particles and the energy states of the surfaces. It was also observed that preferred orientation of CrN coatings changed from (111) to (200) and (220). Hardness of CrN coatings increases and then decreases with the increase of arc current, but the adhesion and friction of CrN coatings coefficient increase. CrN coating of smaller structure which
ISSN:1005-5053
DOI:10.3969/j.issn.1005-5053.2011.4.010