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- Title
Microstructural characterization of oxide layers formed on Ni-20Cr-8Al alloy foam using transmission electron microscopy.
- Authors
Kim, Hyung Giun; Lim, Sung Hwan
- Abstract
Microstructural characterization was carried out during the pre-oxidation of Ni-20Cr-8Al alloy foam using transmission electron microscopy (TEM). During the pre-oxidation at 1000 °C for 1, 30, and 60 min in air, the sequential formations of NiO, NiCr2O4, Cr2O3, and α-Al2O3 1-μm-thick oxide layers were, respectively, characterized. Initially, during pre-oxidization, the layers formed abnormally in an island growth mode, but they grew to be morphologically uniform after 30 min. Pores were found after only 1 min in the middle region of the oxide layers, near the Cr2O3 layer, and then these developed into critical micro-cracks after 60 min. Copyright © 2017 John Wiley & Sons, Ltd.
- Subjects
NICKEL-chromium-aluminum alloys; OXIDATION kinetics; MICROSTRUCTURE; FOAM; OXIDES; TRANSMISSION electron microscopy
- Publication
Surface & Interface Analysis: SIA, 2017, Vol 49, Issue 9, p880
- ISSN
0142-2421
- Publication type
Article
- DOI
10.1002/sia.6236