Journal
SCRIPTA MATERIALIA
Volume 53, Issue 6, Pages 653-656Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2005.05.023
Keywords
in situ observation; oxidation; NbSi2; microstructure; pest phenomenon
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Oxidation processes of poly and single crystalline NbSi2 were observed in situ by high temperature optical microscopy to clarify the pest phenomenon. Pest disintegration is mainly determined by the pre-existing cracks in the microstructure. Porosity and grain boundary are the preferential oxidation sites. Pest oxidation of NbSi2 at 1023 K is not an intrinsic material property. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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