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@article{Harrison:2015:10.1111/jace.13575,
author = {Harrison, R},
doi = {10.1111/jace.13575},
journal = {Journal of the American Ceramic Society},
title = {Mechanism and Kinetics of Oxidation of ZrN Ceramics},
url = {http://dx.doi.org/10.1111/jace.13575},
year = {2015}
}

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TY  - JOUR
AB  - Oxidation of ZrN ceramics from 973–1373 K under static conditions reveals parabolic rate behavior, indicative of a diffusion-controlled process. In-situ high temperature powder XRD found the oxidation mechanism begins with destabilization of ZrN through formation of a ZrN1−x phase with oxide peaks initially detected at around 773 K. The zirconium oxide layer was found to be monoclinic by in-situ XRD with no evidence of tetragonal or cubic polymorphs present to 1023 K. Bulk ceramic samples oxidized at 1173 and 1273 K underwent slower oxidation than those oxidized at 973 and 1073 K. This change in oxidation rate and hence mechanism was due to formation of a denser c-ZrO2 polymorph stabilized by nitrogen defects. This N-doped dense ZrO2 layer acts as a diffusion barrier to oxygen diffusion. However, at an oxidation temperature of 1373 K this layer is no longer protective due to increased diffusion through it resulting in grain boundary oxidation.
AU  - Harrison,R
DO  - 10.1111/jace.13575
PY  - 2015///
SN  - 1551-2916
TI  - Mechanism and Kinetics of Oxidation of ZrN Ceramics
T2  - Journal of the American Ceramic Society
UR  - http://dx.doi.org/10.1111/jace.13575
UR  - http://hdl.handle.net/10044/1/21914
ER  -

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Professor WE (Bill) Lee FREng

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