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A metastable chromium carbide powder obtained by carburization of a metastable chromium oxide

Loubière, Sophie and Laurent, Christophe and Bonino, Jean-Pierre and Rousset, Abel A metastable chromium carbide powder obtained by carburization of a metastable chromium oxide. (1996) Journal of Alloys and Compounds, 243 (1-2). 59-66. ISSN 0925-8388

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Official URL: http://dx.doi.org/10.1016/S0925-8388(96)02384-5

Abstract

A metastable Cr3C2−x carbide powder is prepared by carburization of a metastable chromium oxide in H2-CH4 atmosphere under the appropriate conditions (temperature, dwell time and CH4 content). A very high specific surface area (greater than 210 m2 g1) of the starting oxide is necessary to avoid the formation of the sole stable Cr3C2 phase. The transformation from the stable Cr3C2−x to the metastable Cr3C2, is observed for the first time. The driving force could be an epitaxial effect between Cr3C2−x and the surrounding graphite layer. This is consistent with the observation that the formation of graphite layers by CH4 cracking is easier in the Cr3C2−x-containing powders.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Alloys and Compounds website : http://dx.doi.org/10.1016/S0925-8388(96)02384-5
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:25 Mar 2014 15:51

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