Solubility Products of VS and NbS in Iron Alloys
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概要
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Solubility of sulfur in Fe–V and Fe–Nb alloys was experimentally determined using a diffusion couple technique. Solubility product of VS and NbS in ferrite (α) and austenite (γ) phases were determined as log(mass%V)(mass%S)α=4.76−10100/T, log(mass%V)(mass%S)γ=4.90−11000/T and log(mass%Nb)(mass%S)γ=4.70−10500/T in the temperature range from 1523 to 1573 K. A thermodynamic analysis was also carried out to evaluate the formation energy of VS and NbS. The estimated formation energy of VS and NbS are ΔGVSsulfide=−263100+61.0T (J/mol) and ΔGNbSsulfide=−260800+68.4T (J/mol), respectively.
著者
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Oikawa Katsunari
Department of Materials Science, Graduate School of Engineering, Tohoku University
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Sasaki Tomoyuki
Department of Materials Science, Graduate School of Engineering, Tohoku University
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Mitsui Hajime
Department of Materials Science, Graduate School of Engineering, Tohoku University
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Ishida Kiyohito
Department of Materials Science, Graduate School of Engineering, Tohoku University
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