Interfacial kinetics of nitrogen dissolution in molten Fe-Mn-C Alloys Using 15N-14N isotope exchange reaction

Chang Ho Eom, Min Ho Song, Dong Joon Min

Research output: Contribution to journalComment/debate

Abstract

The kinetics of the dissolution of nitrogen into molten Fe-Mn-C alloys through the isotope exchange reaction at 1 673 K was investigated. The rate of nitrogen dissolution into a molten Fe-Mn-C alloy at low oxygen concentrations ([mass% O] < 0.001) indicated a first-order reaction with respect to the partial pressure of nitrogen. In a molten Fe-Mn-C alloy, Mn had a positive effect on the dissolution rate of nitrogen owing to a strong thermodynamic affinity with nitrogen, while carbon produced the opposite effect. The present work on nitrogen dissolution in molten Fe-Mn-C alloys was compared to previous studies on the carbon-free Fe-Mn binary alloy, providing empirical evidence for the proportionality of the rate constant to the square of the Mn alloying element activity. It should also be noted that nitrogen dissolution into the molten Fe- Mn-C alloy could be described using a parallel reaction model for the ideal mixing between Fe and Mn, which is also discussed in detail.

Original languageEnglish
Pages (from-to)2694-2696
Number of pages3
JournalISIJ International
Volume55
Issue number12
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

Isotopes
Molten materials
Dissolution
Nitrogen
Kinetics
Carbon
Binary alloys
Alloying elements
Partial pressure
Rate constants
Thermodynamics
Oxygen

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Interfacial kinetics of nitrogen dissolution in molten Fe-Mn-C Alloys Using 15N-14N isotope exchange reaction",
abstract = "The kinetics of the dissolution of nitrogen into molten Fe-Mn-C alloys through the isotope exchange reaction at 1 673 K was investigated. The rate of nitrogen dissolution into a molten Fe-Mn-C alloy at low oxygen concentrations ([mass{\%} O] < 0.001) indicated a first-order reaction with respect to the partial pressure of nitrogen. In a molten Fe-Mn-C alloy, Mn had a positive effect on the dissolution rate of nitrogen owing to a strong thermodynamic affinity with nitrogen, while carbon produced the opposite effect. The present work on nitrogen dissolution in molten Fe-Mn-C alloys was compared to previous studies on the carbon-free Fe-Mn binary alloy, providing empirical evidence for the proportionality of the rate constant to the square of the Mn alloying element activity. It should also be noted that nitrogen dissolution into the molten Fe- Mn-C alloy could be described using a parallel reaction model for the ideal mixing between Fe and Mn, which is also discussed in detail.",
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Interfacial kinetics of nitrogen dissolution in molten Fe-Mn-C Alloys Using 15N-14N isotope exchange reaction. / Eom, Chang Ho; Song, Min Ho; Min, Dong Joon.

In: ISIJ International, Vol. 55, No. 12, 01.01.2015, p. 2694-2696.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Interfacial kinetics of nitrogen dissolution in molten Fe-Mn-C Alloys Using 15N-14N isotope exchange reaction

AU - Eom, Chang Ho

AU - Song, Min Ho

AU - Min, Dong Joon

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The kinetics of the dissolution of nitrogen into molten Fe-Mn-C alloys through the isotope exchange reaction at 1 673 K was investigated. The rate of nitrogen dissolution into a molten Fe-Mn-C alloy at low oxygen concentrations ([mass% O] < 0.001) indicated a first-order reaction with respect to the partial pressure of nitrogen. In a molten Fe-Mn-C alloy, Mn had a positive effect on the dissolution rate of nitrogen owing to a strong thermodynamic affinity with nitrogen, while carbon produced the opposite effect. The present work on nitrogen dissolution in molten Fe-Mn-C alloys was compared to previous studies on the carbon-free Fe-Mn binary alloy, providing empirical evidence for the proportionality of the rate constant to the square of the Mn alloying element activity. It should also be noted that nitrogen dissolution into the molten Fe- Mn-C alloy could be described using a parallel reaction model for the ideal mixing between Fe and Mn, which is also discussed in detail.

AB - The kinetics of the dissolution of nitrogen into molten Fe-Mn-C alloys through the isotope exchange reaction at 1 673 K was investigated. The rate of nitrogen dissolution into a molten Fe-Mn-C alloy at low oxygen concentrations ([mass% O] < 0.001) indicated a first-order reaction with respect to the partial pressure of nitrogen. In a molten Fe-Mn-C alloy, Mn had a positive effect on the dissolution rate of nitrogen owing to a strong thermodynamic affinity with nitrogen, while carbon produced the opposite effect. The present work on nitrogen dissolution in molten Fe-Mn-C alloys was compared to previous studies on the carbon-free Fe-Mn binary alloy, providing empirical evidence for the proportionality of the rate constant to the square of the Mn alloying element activity. It should also be noted that nitrogen dissolution into the molten Fe- Mn-C alloy could be described using a parallel reaction model for the ideal mixing between Fe and Mn, which is also discussed in detail.

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