Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7913331 | Scripta Materialia | 2015 | 4 Pages |
Abstract
Microstructure evolution during oxidation of ZrN coating at 650 °C was investigated by in situ and ex situ methods. The results reveal the simultaneous occurrence of epitaxially growing tetragonal ZrO2 near the ZrO2-ZrN interface and transformation from preformed tetragonal to monoclinic phase close to the oxide surface. The significant volume expansion associated with tetragonal â monoclinic transformation plays a major role in producing interconnected microcracks and pores across the oxide scale, which provide fast diffusion paths of oxygen and hence lower the oxidation resistance of ZrN coating.
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Authors
Z.B. Qi, Z.T. Wu, H.F. Liang, D.F. Zhang, J.H. Wang, Z.C. Wang,