Journal
INTERMETALLICS
Volume 23, Issue -, Pages 12-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2011.11.007
Keywords
Silicides, various; Oxidation; Electron microprobe; Energy systems (including energy conversion)
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0028098]
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Oxidation behaviors of the Nb-based two phase alloys comprising the Nb(Si, B) solid solution and Nb-5(Si, B)(3) phases have been evaluated based on the microstructural characterizations of isothermally oxidized samples at 1100 degrees C under ambient atmosphere. The oxide products were identified as beta-Nb2O5, NbO2 and 3Nb(2)O(5)center dot B2O3, while the existence of Si/B rich crystalline oxide or glassy oxide layers could not be confirmed from the microstructural analysis results. The critical oxidation sequences with respect to the selected alloy compositions are discussed in terms of microstructural evolutions during oxidation exposure. (C) 2011 Elsevier Ltd. All rights reserved.
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