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Coatings 2018, 8(1), 19; https://doi.org/10.3390/coatings8010019

Influence of Oxygen Contents on the Microstructure, High Temperature Oxidation and Corrosion Resistance Properties of Cr–Si–O–N Coatings

1
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
2
School of Physics Science and Technology, Lingnan Normal University, Zhanjiang 524048, China
*
Author to whom correspondence should be addressed.
Received: 8 November 2017 / Revised: 19 December 2017 / Accepted: 25 December 2017 / Published: 3 January 2018
(This article belongs to the Special Issue Hybrid Surface Coatings & Process (Selected Papers from HyMaP 2017))
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Abstract

Cr–Si–O–N coatings with different oxygen contents were deposited by multi-arc ion plating, where various O2/(N2 + O2) reactive gas rates were adopted. The XRD and XPS results showed that the CrN crystals disappeared with the increasing of the oxygen flux ratio to 10 at.%. The microhardness of all the Cr–Si–O–N coatings was approximately 2000 Hv0.05, which were dramatically plummeted compared to that of the Cr–Si–N coatings (≈3300 Hv0.05). The Cr–Si–O–N coatings were annealed under 800 °C and 1200 °C in the air atmosphere for 2 h to study the high-temperature oxidation resistance of the coatings. Meanwhile, Cr–Si–O–N coatings with different O2/(N2 + O2) rates were also used to carry out the corrosion resistance testing using the electrochemical working station in 3.5% NaCl solution under free air condition at room temperature. The results indicated that the coatings containing oxygen were more vulnerable to the high-temperature destruction and more easily corroded in the NaCl electrolyte. View Full-Text
Keywords: Cr–Si–O–N; oxygen contents; microhardness; high-temperature oxidation resistance; corrosion resistance Cr–Si–O–N; oxygen contents; microhardness; high-temperature oxidation resistance; corrosion resistance
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Liang, J.; Chen, S.; Zou, C.; Tian, C.; Wang, Z.; Liao, S. Influence of Oxygen Contents on the Microstructure, High Temperature Oxidation and Corrosion Resistance Properties of Cr–Si–O–N Coatings. Coatings 2018, 8, 19.

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