Activities of Chromium in Molten Fe-Cr-C Alloy

Jung Ho Park; Dong Joon Min; Chang Hee Rhee

doi:10.2355/isijinternational.38.1287

Activities of Chromium in Molten Fe-Cr-C Alloy

Jung Ho Park, Dong Joon Min, Chang Hee Rhee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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; lnγC°r(S) = 1.29-7.09X_C 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-C_satd 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 language	English
Pages (from-to)	1287-1291
Number of pages	5
Journal	ISIJ International
Volume	38
Issue number	12
DOIs	https://doi.org/10.2355/isijinternational.38.1287
Publication status	Published - 1998

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Activities of Chromium in Molten Fe-Cr-C Alloy",

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; lnγC°r(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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T1 - Activities of Chromium in Molten Fe-Cr-C Alloy

AU - Park, Jung Ho

AU - Min, Dong Joon

AU - Rhee, Chang Hee

PY - 1998

Y1 - 1998

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; lnγC°r(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.

AB - 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; lnγC°r(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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Activities of Chromium in Molten Fe-Cr-C Alloy

Abstract

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