Effects of Al Content on the Microstructures and Oxidation Resistance of Cr1-xAlxN Films Synthesized by Multi-Arc Ion Plating Method

Abstract:

The CrAlN composite coatings with different Al content are deposited on 65Mn steel substrate by multi-ion plating technology. The structure, surface morphology, composition and oxidation resistance of CrAlN composite coatings are tested by XRD, EDS, SEM and oxidation furnace, respectively. The experimental results show that the preferential growth orientation of the coatings was changed from CrN (111) to CrN (200) after the addition of Al element. And the surface roughness of CrAlN coatings increase gradually with increasing of Al content. Compared with CrN coatings, the CrAlN composite coatings show much better oxidation resistance. And the oxidation resistance ability will enhance with increasing Al content, because Al and Cr oxide form after oxidation in high temperature condition which could reduce the diffusivity ability of oxygen.

• Periodical: Applied Mechanics and Materials (Volumes 155-156)
• Pages: 579-584
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.155-156.579
• Online since: February 2012
• Authors: Zhi Hai Cai, Yue Lan Di, Zhen Yang, Ping Zhang
• Keywords: CrAlN Composite Coatings, Ion Plating, Microstructure, Oxidation Resistance, Piston Rings

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