Activities of chromium in molten Fe-Cr-C alloy

Jung Ho Park, Dong Joon Min, Chang Hee Rhee

Research output: Contribution to journalArticle

Abstract

The activity of chromium in molten Fe-Cr-C alloy was measured at 1 823 K using chemical equilibration technique in the dilute Cr concentration region. It was found that chromium in Fe-Cr-C alloy showed Henrian behavior up to 3 mass% Cr and that the activity coefficient of chromium at infinitely dilute solution in Fe-Cr alloy was 3.90 at 1 823 K. The effects of carbon on the activity coefficient of chromium at infinitely dilute solution in Fe-Cr-C alloy could be expressed as follows; In γ°Cr(S) = 1.29-7.09Xc at 1 823 K. There is little temperature dependence of the activity of chromium at carbon saturated condition. The standard Gibbs energy of mixing for Fe-Cr alloy, and Fe-Cr-Csatd alloy was calculated using the Gibbs-Duhem relationship. The results indicated that the affinity between chromium is larger than that of chromium for iron in Fe-Cr alloy. But the affinity between chromium and carbon is increased with increasing carbon.

Original languageEnglish
Pages (from-to)1287-1291
Number of pages5
JournalJournal of Engineering and Applied Science
Volume38
Issue number12
Publication statusPublished - 1998 Dec 1

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Molten materials
Chromium
Carbon
Activity coefficients
Gibbs free energy
Iron

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Park, Jung Ho ; Min, Dong Joon ; Rhee, Chang Hee. / Activities of chromium in molten Fe-Cr-C alloy. In: Journal of Engineering and Applied Science. 1998 ; Vol. 38, No. 12. pp. 1287-1291.
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Activities of chromium in molten Fe-Cr-C alloy. / Park, Jung Ho; Min, Dong Joon; Rhee, Chang Hee.

In: Journal of Engineering and Applied Science, Vol. 38, No. 12, 01.12.1998, p. 1287-1291.

Research output: Contribution to journalArticle

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AU - Park, Jung Ho

AU - Min, Dong Joon

AU - Rhee, Chang Hee

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N2 - The activity of chromium in molten Fe-Cr-C alloy was measured at 1 823 K using chemical equilibration technique in the dilute Cr concentration region. It was found that chromium in Fe-Cr-C alloy showed Henrian behavior up to 3 mass% Cr and that the activity coefficient of chromium at infinitely dilute solution in Fe-Cr alloy was 3.90 at 1 823 K. The effects of carbon on the activity coefficient of chromium at infinitely dilute solution in Fe-Cr-C alloy could be expressed as follows; In γ°Cr(S) = 1.29-7.09Xc at 1 823 K. There is little temperature dependence of the activity of chromium at carbon saturated condition. The standard Gibbs energy of mixing for Fe-Cr alloy, and Fe-Cr-Csatd alloy was calculated using the Gibbs-Duhem relationship. The results indicated that the affinity between chromium is larger than that of chromium for iron in Fe-Cr alloy. But the affinity between chromium and carbon is increased with increasing carbon.

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