Accelerated oxidation behavior of NbSi2 coating grown on Nb substrate at 600-900 °C

Title
Accelerated oxidation behavior of NbSi2 coating grown on Nb substrate at 600-900 °C
Authors
윤진국김긍호
Keywords
Intermetallics; SEM; TEM; XRD; Oxidation
Issue Date
2018-08
Publisher
Corrosion science
Citation
VOL 141-108
Abstract
Isothermal oxidation of NbSi2 coating formed on Nb substrate was investigated in air at 600– 900  °C, which exhibited the complex and accelerated kinetics at intermediate temperatures and failed due to either the cracking of the NbSi2 coating or the oxide layer formed. This complex oxidation behavior was governed by the balance between the stress generated by the forming of oxide phases and the subsequent stress relaxation processes. Pesting-induced accelerated oxidation at 700  °C was affected by extrinsic factors such as pre-existing defects in NbSi2 coating. Accelerated oxidation originated from the oxide layer cracking at 750  °C was intrinsic to NbSi2.
URI
http://pubs.kist.re.kr/handle/201004/67927
ISSN
0010-938X
Appears in Collections:
KIST Publication > Article
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