A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux

Seung Min Han; Good Sun Choi; Dong Joon Min

A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux

Seung Min Han, Good Sun Choi, Dong Joon Min

Department of Materials Science and Engineering

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

Abstract

Oxygen of titanium originated by the strong affinity plays a important role to improve the mechanical properties of titanium such as high specific strength and corrosion resistance. In order to propose the methodology of control of oxygen of titanium, thermodynamic behavior of calcium in the molten calcium halide fluxes at 1173-1673 K was investigated. A degree of deoxidizing efficiency of titanium was affected by the stability of deoxidizing reactant on titanium surface which had been controlled by calcium halides flux. The optimum conditions for deoxidation of titanium by metallic calcium and calcium halide flux could achieve up to 100 ppm of oxygen in titanium by using Ca-CaC1₂ flux system at 1273-1373 K. In this case, the optimum calcium content in flux could be proposed about 5~7 mol%. In case of using Ca-CaF₂ flux, however, optimum calcium content was about 15 mol% at 1473-1573 K with 200 ppm of oxygen of obtained titanium. In calcium halide flux, the oxygen content of titanium could be controlled by optimization of the activity ratio, a_CaO / a_Ca = 0.1. The activity ratio of reactant to deoxidizer is an index of effectiveness of deoxidation of titanium.

Original language	English
Title of host publication	Ti-2007 - Proceedings of the 11th World Conference on Titanium
Editors	M. Niinomi, S. Akiyama, M. Ikeda, M. Hagiwara, K. Maruyama
Publisher	Japan Institute of Metals (JIM)
Pages	123-126
Number of pages	4
ISBN (Electronic)	9784889034066
Publication status	Published - 2007
Event	11th World Conference on Titanium, Ti-2007 - Kyoto, Japan Duration: 2007 Jun 3 → 2007 Jun 7

Publication series

Name	Ti-2007 - Proceedings of the 11th World Conference on Titanium
Volume	1

Conference

Conference	11th World Conference on Titanium, Ti-2007
Country/Territory	Japan
City	Kyoto
Period	07/6/3 → 07/6/7

Bibliographical note

Publisher Copyright:
© Ti-2007 - Proceedings of the 11th World Conference on Titanium. All Rights Reserved.

All Science Journal Classification (ASJC) codes

Ceramics and Composites

Cite this

Han, S. M., Choi, G. S., & Min, D. J. (2007). A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux. In M. Niinomi, S. Akiyama, M. Ikeda, M. Hagiwara, & K. Maruyama (Eds.), Ti-2007 - Proceedings of the 11th World Conference on Titanium (pp. 123-126). (Ti-2007 - Proceedings of the 11th World Conference on Titanium; Vol. 1). Japan Institute of Metals (JIM).

Han, Seung Min ; Choi, Good Sun ; Min, Dong Joon. / A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux. Ti-2007 - Proceedings of the 11th World Conference on Titanium. editor / M. Niinomi ; S. Akiyama ; M. Ikeda ; M. Hagiwara ; K. Maruyama. Japan Institute of Metals (JIM), 2007. pp. 123-126 (Ti-2007 - Proceedings of the 11th World Conference on Titanium).

@inproceedings{3f2a817b51734891863b4f91f2d5afc2,

title = "A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux",

abstract = "Oxygen of titanium originated by the strong affinity plays a important role to improve the mechanical properties of titanium such as high specific strength and corrosion resistance. In order to propose the methodology of control of oxygen of titanium, thermodynamic behavior of calcium in the molten calcium halide fluxes at 1173-1673 K was investigated. A degree of deoxidizing efficiency of titanium was affected by the stability of deoxidizing reactant on titanium surface which had been controlled by calcium halides flux. The optimum conditions for deoxidation of titanium by metallic calcium and calcium halide flux could achieve up to 100 ppm of oxygen in titanium by using Ca-CaC12 flux system at 1273-1373 K. In this case, the optimum calcium content in flux could be proposed about 5~7 mol%. In case of using Ca-CaF2 flux, however, optimum calcium content was about 15 mol% at 1473-1573 K with 200 ppm of oxygen of obtained titanium. In calcium halide flux, the oxygen content of titanium could be controlled by optimization of the activity ratio, aCaO / aCa = 0.1. The activity ratio of reactant to deoxidizer is an index of effectiveness of deoxidation of titanium.",

keywords = "Calcium, Deoxidation, Halide flux, Refining, Titanium",

author = "Han, {Seung Min} and Choi, {Good Sun} and Min, {Dong Joon}",

note = "Publisher Copyright: {\textcopyright} Ti-2007 - Proceedings of the 11th World Conference on Titanium. All Rights Reserved.; 11th World Conference on Titanium, Ti-2007 ; Conference date: 03-06-2007 Through 07-06-2007",

year = "2007",

language = "English",

series = "Ti-2007 - Proceedings of the 11th World Conference on Titanium",

publisher = "Japan Institute of Metals (JIM)",

pages = "123--126",

editor = "M. Niinomi and S. Akiyama and M. Ikeda and M. Hagiwara and K. Maruyama",

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}

Han, SM, Choi, GS & Min, DJ 2007, A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux. in M Niinomi, S Akiyama, M Ikeda, M Hagiwara & K Maruyama (eds), Ti-2007 - Proceedings of the 11th World Conference on Titanium. Ti-2007 - Proceedings of the 11th World Conference on Titanium, vol. 1, Japan Institute of Metals (JIM), pp. 123-126, 11th World Conference on Titanium, Ti-2007, Kyoto, Japan, 07/6/3.

A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux. / Han, Seung Min; Choi, Good Sun; Min, Dong Joon.
Ti-2007 - Proceedings of the 11th World Conference on Titanium. ed. / M. Niinomi; S. Akiyama; M. Ikeda; M. Hagiwara; K. Maruyama. Japan Institute of Metals (JIM), 2007. p. 123-126 (Ti-2007 - Proceedings of the 11th World Conference on Titanium; Vol. 1).

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

TY - GEN

T1 - A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux

AU - Han, Seung Min

AU - Choi, Good Sun

AU - Min, Dong Joon

PY - 2007

Y1 - 2007

N2 - Oxygen of titanium originated by the strong affinity plays a important role to improve the mechanical properties of titanium such as high specific strength and corrosion resistance. In order to propose the methodology of control of oxygen of titanium, thermodynamic behavior of calcium in the molten calcium halide fluxes at 1173-1673 K was investigated. A degree of deoxidizing efficiency of titanium was affected by the stability of deoxidizing reactant on titanium surface which had been controlled by calcium halides flux. The optimum conditions for deoxidation of titanium by metallic calcium and calcium halide flux could achieve up to 100 ppm of oxygen in titanium by using Ca-CaC12 flux system at 1273-1373 K. In this case, the optimum calcium content in flux could be proposed about 5~7 mol%. In case of using Ca-CaF2 flux, however, optimum calcium content was about 15 mol% at 1473-1573 K with 200 ppm of oxygen of obtained titanium. In calcium halide flux, the oxygen content of titanium could be controlled by optimization of the activity ratio, aCaO / aCa = 0.1. The activity ratio of reactant to deoxidizer is an index of effectiveness of deoxidation of titanium.

AB - Oxygen of titanium originated by the strong affinity plays a important role to improve the mechanical properties of titanium such as high specific strength and corrosion resistance. In order to propose the methodology of control of oxygen of titanium, thermodynamic behavior of calcium in the molten calcium halide fluxes at 1173-1673 K was investigated. A degree of deoxidizing efficiency of titanium was affected by the stability of deoxidizing reactant on titanium surface which had been controlled by calcium halides flux. The optimum conditions for deoxidation of titanium by metallic calcium and calcium halide flux could achieve up to 100 ppm of oxygen in titanium by using Ca-CaC12 flux system at 1273-1373 K. In this case, the optimum calcium content in flux could be proposed about 5~7 mol%. In case of using Ca-CaF2 flux, however, optimum calcium content was about 15 mol% at 1473-1573 K with 200 ppm of oxygen of obtained titanium. In calcium halide flux, the oxygen content of titanium could be controlled by optimization of the activity ratio, aCaO / aCa = 0.1. The activity ratio of reactant to deoxidizer is an index of effectiveness of deoxidation of titanium.

KW - Calcium

KW - Deoxidation

KW - Halide flux

KW - Refining

KW - Titanium

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M3 - Conference contribution

AN - SCOPUS:85182279596

T3 - Ti-2007 - Proceedings of the 11th World Conference on Titanium

SP - 123

EP - 126

BT - Ti-2007 - Proceedings of the 11th World Conference on Titanium

A2 - Niinomi, M.

A2 - Akiyama, S.

A2 - Ikeda, M.

A2 - Hagiwara, M.

A2 - Maruyama, K.

PB - Japan Institute of Metals (JIM)

T2 - 11th World Conference on Titanium, Ti-2007

Y2 - 3 June 2007 through 7 June 2007

ER -

A Thermodynamic Study on the Deoxidation of Titanium by Calcium Halide Flux

Abstract

Publication series

Conference

Bibliographical note

All Science Journal Classification (ASJC) codes

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