Oxidation-Resistance of (Ti,Al,Nb)N Coatings Prepared by Arc Ion Plating

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Abstract:

In this study, composite metastable (Ti0.5Al0.5)N, (Ti0.475Al0.475Nb0.05)N and (Ti0.45Al0.45Nb0.1)N coatings were respectively deposited on a wrought martensite steel 1Cr11Ni2W2MoV by arc ion plating technique. All coatings possessed a dense structure, although droplets existed on the surface of the coatings. It was identified by XRD that the phase structure of all the coatings was the same B1 NaCl with a small mount of ε phase. Oxidation-resistance of (Ti,Al,Nb)N coatings at 800oC for up to 50 hr was investigated and the results showed that the introduction of niobium into the coatings dramastically improved the oxidation-resistance of the coatings in air. (Ti0.45Al0.45Nb0.1)N possessed more excellent oxidation-resistance than (Ti0.475Al0.475Nb0.05)N.

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Advanced Materials Research (Volumes 941-944)

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1376-1379

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June 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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