Comparison of the oxidation behavior of a zirconium nitride coating in water vapor and air at high temperature

Gao, Z, Chen, Y, Kulczyk-Malecka, J, Kelly, P, Zeng, Y, Zhang, X, Li, C, Liu, H, Rohbeck, N and Xiao, P (2018) Comparison of the oxidation behavior of a zirconium nitride coating in water vapor and air at high temperature. Corrosion Science, 138. pp. 242-251. ISSN 0010-938X

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Official URL: http://www.elsevier.com/locate/issn/0010938X

Abstract

The oxidation behavior of zirconium nitride coating in high-temperature water vapor and air environments was studied. The parabolic rate constant of ZrN oxidizing in the water vapor environment at 600 ℃ was approximately 100 times faster than that in air, due to the larger pores and greater number of cracks that were formed across ZrO2 oxide layer formed during the water vapor oxidation process than during the air oxidation process. A bilayer-structure ZrO2 with tetragonal ZrO2 near the ZrN/ZrO2 interface and monoclinic ZrO2 approaching the outer ZrO2 surface were formed in both cases. The lateral cracks across the ZrO2 scale were caused by volume expansion from the tetragonal ZrO2 phase to the monoclinic ZrO2 phase transition.

Item Type:	Article
Peer-reviewed:	Yes
Date Deposited:	18 Apr 2018 13:50
Publisher:	Elsevier
Additional Information:	This is an Author Accepted Manuscript of a paper accepted for publication in Corrosion Science, published by and copyright Elsevier.
Divisions:	Faculties > Science and Engineering
Subject terms:	zirconium nitride, water vapour, oxide cracks, phase transition, oxidation kinetics, oxidation mechanisms, 0912 Materials Engineering, 0905 Civil Engineering, 0913 Mechanical Engineering, Energy
URI:	https://e-space.mmu.ac.uk/id/eprint/620365
DOI:	https://doi.org/10.1016/j.corsci.2018.04.015
ISSN	0010-938X

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