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Processing and Excellent Oxidation Resistance of Nanocrystalline Fe-Cr Alloys

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Abstract:

Nanocrystalline and microcrystalline Fe-10Cr alloys were prepared by high energy ball milling followed by compaction and sintering, and then oxidized in air for 52 hours at 400°C. The oxidation resistance of nanocrystalline Fe-10Cr alloy as determined by measuring the weight gain after regular time intervals was compared with that of the microcrystalline alloy of same chemical composition (also prepared by the same processing route and oxidized under identical conditions). Oxidation resistance of nanocrystalline Fe10Cr alloy was found to be in excess of an order of magnitude superior than that of microcrystalline Fe10Cr alloy. The paper also presents results of secondary ion mass spectrometry of oxidized samples of nanocrystalline and microcrystalline Fe-Cr alloys, evidencing the formation of a more protective oxide scale in the nanocrystalline alloy.

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Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

1122-1125

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.1122

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Online since:

June 2010

Authors:

Rajeev K. Gupta, B.V. Mahesh, R.K. Singh Raman, Carl C. Koch

Keywords:

Ball Milling, Consolidation, Nanocrystalline Fe-Cr Alloy, Oxidation, Secondary Ion Mass Spectroscopy (SIMS)

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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