Thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys

Shigeru Ueda; Kazuki Morita; Nobuo Sano

doi:10.1007/s11663-997-0071-x

Thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys

Shigeru Ueda, Kazuki Morita, Nobuo Sano

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

18 Citations (Scopus)

Abstract

The thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys has been investigated at 1723 K by equilibrating the alloys in a controlled phosphorus partial pressure. The activity coefficient of phosphorus in each alloy shows a maximum value at a certain composition due to a strong interaction between silicon and iron and between silicon and manganese. Interaction coefficients between phosphorus and iron in molten silicon were found to be ε_P^Fe = 7.43 and ρ_P^Fe = -16.4 (0 ≤ X §0.65), and those between phosphorus and manganese were ε_P^Fe = 12.0 and ρ_P^Fe = -22.2 (0 ≤X ≤0.5). Further discussion has revealed that the Si-Fe-P and Si-Mn-P systems approximately conform to a regular solution within the composition ranges investigated in the present work.

Original language	English
Pages (from-to)	1151-1155
Number of pages	5
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	28
Issue number	6
DOIs	https://doi.org/10.1007/s11663-997-0071-x
Publication status	Published - 1997 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/s11663-997-0071-x

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abstract = "The thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys has been investigated at 1723 K by equilibrating the alloys in a controlled phosphorus partial pressure. The activity coefficient of phosphorus in each alloy shows a maximum value at a certain composition due to a strong interaction between silicon and iron and between silicon and manganese. Interaction coefficients between phosphorus and iron in molten silicon were found to be εPFe = 7.43 and ρPFe = -16.4 (0 ≤ X §0.65), and those between phosphorus and manganese were εPFe = 12.0 and ρPFe = -22.2 (0 ≤X ≤0.5). Further discussion has revealed that the Si-Fe-P and Si-Mn-P systems approximately conform to a regular solution within the composition ranges investigated in the present work.",

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T1 - Thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys

AU - Ueda, Shigeru

AU - Morita, Kazuki

AU - Sano, Nobuo

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys has been investigated at 1723 K by equilibrating the alloys in a controlled phosphorus partial pressure. The activity coefficient of phosphorus in each alloy shows a maximum value at a certain composition due to a strong interaction between silicon and iron and between silicon and manganese. Interaction coefficients between phosphorus and iron in molten silicon were found to be εPFe = 7.43 and ρPFe = -16.4 (0 ≤ X §0.65), and those between phosphorus and manganese were εPFe = 12.0 and ρPFe = -22.2 (0 ≤X ≤0.5). Further discussion has revealed that the Si-Fe-P and Si-Mn-P systems approximately conform to a regular solution within the composition ranges investigated in the present work.

AB - The thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys has been investigated at 1723 K by equilibrating the alloys in a controlled phosphorus partial pressure. The activity coefficient of phosphorus in each alloy shows a maximum value at a certain composition due to a strong interaction between silicon and iron and between silicon and manganese. Interaction coefficients between phosphorus and iron in molten silicon were found to be εPFe = 7.43 and ρPFe = -16.4 (0 ≤ X §0.65), and those between phosphorus and manganese were εPFe = 12.0 and ρPFe = -22.2 (0 ≤X ≤0.5). Further discussion has revealed that the Si-Fe-P and Si-Mn-P systems approximately conform to a regular solution within the composition ranges investigated in the present work.

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Thermodynamics of phosphorus in molten Si-Fe and Si-Mn alloys

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