Gibbs energies of formation of chromium carbides

Anthonysamy, S and Ananthasivan, K and Kaliappan, I and Chandramouli, V and Rao, PRV and Mathews, CK and Jacob, KT (1996) Gibbs energies of formation of chromium carbides. In: Metallurgical and Materials Transactions A, 27 (7). pp. 1919-1924.

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Abstract

The carbon potentials corresponding to the two-phase mixtures Cr + Cr23C6, Cr23C6 + Cr7C3, and Cr7C3 + Cr3C2 in the binary system Cr-C were measured in the temperature range 973 to 1173 K by using the methane-hydrogen gas equilibration technique. Special precautions were taken to prevent oxidation of the samples and to minimize thermal segregation in the gas phase. The standard Gibbs energies of formation of Cr23C6, Cr7C3, and Cr3C2 were derived from the measured carbon potentials. These values are compared with those reported in the literature. The Gibbs energies obtained in this study agree well with those obtained from solid-state cells incorporating CaF2 and ThO2(Y2O3) as solid electrolytes and sealed capsule isopiestic measurements reported in the literature.

Item Type:	Journal Article
Publication:	Metallurgical and Materials Transactions A
Publisher:	The minerals, metals & materials society
Additional Information:	Copyright of this article belongs to The minerals, metals & materials society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	28 Apr 2011 07:34
Last Modified:	28 Apr 2011 07:34
URI:	http://eprints.iisc.ac.in/id/eprint/37273

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