Oxidation resistance of nanocrystalline vis-a-vis microcrystalline Fe-Cr alloys

Raghuvir Kumar Singh Raman, Rajeev Kumar Gupta

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This paper investigates the hypothesis that nanocrystalline structure may confer considerable oxidation resistance to irona??chromium alloys at much lower chromium contents. Discs of nanocrystalline Fea??10 Cr alloy were produced by ball milling of Fe and Cr powders and compaction of the powder without considerable grain growth (by processing within a suitable timea??temperature window). Corrosion resistance of discs of nanocrystalline and microcrystalline alloys was compared by subjecting them to oxidation in air and post-oxidation characterisation of the oxide scales by secondary ion mass spectroscopy (SIMS). Nanocrystalline Fea??10 Cr alloy showed considerably greater oxidation resistance than the microcrystalline alloy of the same composition. Chromium content of the inner scale formed over the nanocrystalline alloy was detected to be nearly five times greater than that in the case of microcrystalline alloy, facilitating formation of the passive layer and providing an explanation for the greater oxidation of the former.
Original languageEnglish
Pages (from-to)316 - 321
Number of pages6
JournalCorrosion Science
Volume51
Issue number2
DOIs
Publication statusPublished - 2009

Cite this

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title = "Oxidation resistance of nanocrystalline vis-a-vis microcrystalline Fe-Cr alloys",
abstract = "This paper investigates the hypothesis that nanocrystalline structure may confer considerable oxidation resistance to irona??chromium alloys at much lower chromium contents. Discs of nanocrystalline Fea??10 Cr alloy were produced by ball milling of Fe and Cr powders and compaction of the powder without considerable grain growth (by processing within a suitable timea??temperature window). Corrosion resistance of discs of nanocrystalline and microcrystalline alloys was compared by subjecting them to oxidation in air and post-oxidation characterisation of the oxide scales by secondary ion mass spectroscopy (SIMS). Nanocrystalline Fea??10 Cr alloy showed considerably greater oxidation resistance than the microcrystalline alloy of the same composition. Chromium content of the inner scale formed over the nanocrystalline alloy was detected to be nearly five times greater than that in the case of microcrystalline alloy, facilitating formation of the passive layer and providing an explanation for the greater oxidation of the former.",
author = "{Singh Raman}, {Raghuvir Kumar} and Gupta, {Rajeev Kumar}",
year = "2009",
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language = "English",
volume = "51",
pages = "316 -- 321",
journal = "Corrosion Science",
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Oxidation resistance of nanocrystalline vis-a-vis microcrystalline Fe-Cr alloys. / Singh Raman, Raghuvir Kumar; Gupta, Rajeev Kumar.

In: Corrosion Science, Vol. 51, No. 2, 2009, p. 316 - 321.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Oxidation resistance of nanocrystalline vis-a-vis microcrystalline Fe-Cr alloys

AU - Singh Raman, Raghuvir Kumar

AU - Gupta, Rajeev Kumar

PY - 2009

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AB - This paper investigates the hypothesis that nanocrystalline structure may confer considerable oxidation resistance to irona??chromium alloys at much lower chromium contents. Discs of nanocrystalline Fea??10 Cr alloy were produced by ball milling of Fe and Cr powders and compaction of the powder without considerable grain growth (by processing within a suitable timea??temperature window). Corrosion resistance of discs of nanocrystalline and microcrystalline alloys was compared by subjecting them to oxidation in air and post-oxidation characterisation of the oxide scales by secondary ion mass spectroscopy (SIMS). Nanocrystalline Fea??10 Cr alloy showed considerably greater oxidation resistance than the microcrystalline alloy of the same composition. Chromium content of the inner scale formed over the nanocrystalline alloy was detected to be nearly five times greater than that in the case of microcrystalline alloy, facilitating formation of the passive layer and providing an explanation for the greater oxidation of the former.

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JF - Corrosion Science

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