Thermodynamics of mold powder

Hiroyuki Fukuyama; Takashi Watanabe; Hideko Takahashi; Hideki Tabata; Tadayuki Oshima; Kazuhiro Nagata

Thermodynamics of mold powder

Hiroyuki Fukuyama, Takashi Watanabe, Hideko Takahashi, Hideki Tabata, Tadayuki Oshima, Kazuhiro Nagata

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Cuspidine (3CaO·2SiO₂·CaF₂) is one of the most important compounds crystallized in mold flux films during casting in the continuous casting process of steel. The primary crystallization field of cuspidine has been experimentally developed in the CaO-SiO₂-CaF₂-SiF₄ system. The cuspidine-NaF binary and cuspidine-CaF₂-NaF ternary systems have been also experimentally determined to study effects of addition of NaF on the primary field of cuspidine. In order to discuss its thermodynamic stability the standard Gibbs energy of formation of cuspidine has been determined by an electromotive force method using CaF₂ as solid electrolyte and a transpiration method as follows: Δ_tG⁰(cuspidine)/kJmol^-1 = -5198 + 0.825T (± 12) (1313<T/K<1329): EMF method Δ_tG⁰(cuspidine)/kJmol^-1 = -5178 + 0.813T (± 8) (1221<T/K<1469): Transpiration method The chemical potential diagram and constituent activities for the CaO-SiO₂-CaF₂ system have been evaluated based on the obtained thermodynamic data.

Original language	English
Title of host publication	Yazawa International Symposium
Subtitle of host publication	Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
Editors	F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn, F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn
Pages	937-951
Number of pages	15
Publication status	Published - 2003 Oct 16
Externally published	Yes
Event	Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies - San Diego, CA, United States Duration: 2003 Mar 2 → 2003 Mar 6

Publication series

Name	Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
Volume	1

Other

Other	Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies
Country/Territory	United States
City	San Diego, CA
Period	03/3/2 → 03/3/6

ASJC Scopus subject areas

Engineering(all)

Cite this

Fukuyama, H., Watanabe, T., Takahashi, H., Tabata, H., Oshima, T., & Nagata, K. (2003). Thermodynamics of mold powder. In F. Kongoli, K. Itagaki, C. Yamauchi, H. Y. Sohn, F. Kongoli, K. Itagaki, C. Yamauchi, & H. Y. Sohn (Eds.), Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies (pp. 937-951). (Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies; Vol. 1).

Thermodynamics of mold powder. / Fukuyama, Hiroyuki; Watanabe, Takashi; Takahashi, Hideko; Tabata, Hideki; Oshima, Tadayuki; Nagata, Kazuhiro.

Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies. ed. / F. Kongoli; K. Itagaki; C. Yamauchi; H.Y. Sohn; F. Kongoli; K. Itagaki; C. Yamauchi; H.Y. Sohn. 2003. p. 937-951 (Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Fukuyama, H, Watanabe, T, Takahashi, H, Tabata, H, Oshima, T & Nagata, K 2003, Thermodynamics of mold powder. in F Kongoli, K Itagaki, C Yamauchi, HY Sohn, F Kongoli, K Itagaki, C Yamauchi & HY Sohn (eds), Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies. Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies, vol. 1, pp. 937-951, Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies, San Diego, CA, United States, 03/3/2.

Fukuyama H, Watanabe T, Takahashi H, Tabata H, Oshima T, Nagata K. Thermodynamics of mold powder. In Kongoli F, Itagaki K, Yamauchi C, Sohn HY, Kongoli F, Itagaki K, Yamauchi C, Sohn HY, editors, Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies. 2003. p. 937-951. (Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies).

Fukuyama, Hiroyuki ; Watanabe, Takashi ; Takahashi, Hideko ; Tabata, Hideki ; Oshima, Tadayuki ; Nagata, Kazuhiro. / Thermodynamics of mold powder. Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies. editor / F. Kongoli ; K. Itagaki ; C. Yamauchi ; H.Y. Sohn ; F. Kongoli ; K. Itagaki ; C. Yamauchi ; H.Y. Sohn. 2003. pp. 937-951 (Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies).

@inproceedings{2a754b3e99ee4faab0c37e877c16ce21,

title = "Thermodynamics of mold powder",

abstract = "Cuspidine (3CaO·2SiO2·CaF2) is one of the most important compounds crystallized in mold flux films during casting in the continuous casting process of steel. The primary crystallization field of cuspidine has been experimentally developed in the CaO-SiO2-CaF2-SiF4 system. The cuspidine-NaF binary and cuspidine-CaF2-NaF ternary systems have been also experimentally determined to study effects of addition of NaF on the primary field of cuspidine. In order to discuss its thermodynamic stability the standard Gibbs energy of formation of cuspidine has been determined by an electromotive force method using CaF2 as solid electrolyte and a transpiration method as follows: ΔtG0(cuspidine)/kJmol-1 = -5198 + 0.825T (± 12) (1313<T/K<1329): EMF method ΔtG0(cuspidine)/kJmol-1 = -5178 + 0.813T (± 8) (1221<T/K<1469): Transpiration method The chemical potential diagram and constituent activities for the CaO-SiO2-CaF2 system have been evaluated based on the obtained thermodynamic data.",

author = "Hiroyuki Fukuyama and Takashi Watanabe and Hideko Takahashi and Hideki Tabata and Tadayuki Oshima and Kazuhiro Nagata",

year = "2003",

month = oct,

day = "16",

language = "English",

isbn = "0873395468",

series = "Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies",

pages = "937--951",

editor = "F. Kongoli and K. Itagaki and C. Yamauchi and H.Y. Sohn and F. Kongoli and K. Itagaki and C. Yamauchi and H.Y. Sohn",

booktitle = "Yazawa International Symposium",

note = "Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies ; Conference date: 02-03-2003 Through 06-03-2003",

}

TY - GEN

T1 - Thermodynamics of mold powder

AU - Fukuyama, Hiroyuki

AU - Watanabe, Takashi

AU - Takahashi, Hideko

AU - Tabata, Hideki

AU - Oshima, Tadayuki

AU - Nagata, Kazuhiro

PY - 2003/10/16

Y1 - 2003/10/16

N2 - Cuspidine (3CaO·2SiO2·CaF2) is one of the most important compounds crystallized in mold flux films during casting in the continuous casting process of steel. The primary crystallization field of cuspidine has been experimentally developed in the CaO-SiO2-CaF2-SiF4 system. The cuspidine-NaF binary and cuspidine-CaF2-NaF ternary systems have been also experimentally determined to study effects of addition of NaF on the primary field of cuspidine. In order to discuss its thermodynamic stability the standard Gibbs energy of formation of cuspidine has been determined by an electromotive force method using CaF2 as solid electrolyte and a transpiration method as follows: ΔtG0(cuspidine)/kJmol-1 = -5198 + 0.825T (± 12) (1313<T/K<1329): EMF method ΔtG0(cuspidine)/kJmol-1 = -5178 + 0.813T (± 8) (1221<T/K<1469): Transpiration method The chemical potential diagram and constituent activities for the CaO-SiO2-CaF2 system have been evaluated based on the obtained thermodynamic data.

AB - Cuspidine (3CaO·2SiO2·CaF2) is one of the most important compounds crystallized in mold flux films during casting in the continuous casting process of steel. The primary crystallization field of cuspidine has been experimentally developed in the CaO-SiO2-CaF2-SiF4 system. The cuspidine-NaF binary and cuspidine-CaF2-NaF ternary systems have been also experimentally determined to study effects of addition of NaF on the primary field of cuspidine. In order to discuss its thermodynamic stability the standard Gibbs energy of formation of cuspidine has been determined by an electromotive force method using CaF2 as solid electrolyte and a transpiration method as follows: ΔtG0(cuspidine)/kJmol-1 = -5198 + 0.825T (± 12) (1313<T/K<1329): EMF method ΔtG0(cuspidine)/kJmol-1 = -5178 + 0.813T (± 8) (1221<T/K<1469): Transpiration method The chemical potential diagram and constituent activities for the CaO-SiO2-CaF2 system have been evaluated based on the obtained thermodynamic data.

UR - http://www.scopus.com/inward/record.url?scp=0141459695&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141459695&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0141459695

SN - 0873395468

T3 - Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies

SP - 937

EP - 951

BT - Yazawa International Symposium

A2 - Kongoli, F.

A2 - Itagaki, K.

A2 - Yamauchi, C.

A2 - Sohn, H.Y.

A2 - Kongoli, F.

A2 - Itagaki, K.

A2 - Yamauchi, C.

A2 - Sohn, H.Y.

T2 - Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies

Y2 - 2 March 2003 through 6 March 2003

ER -

Thermodynamics of mold powder

Abstract

Publication series

Other

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this