Thermodynamics of titanium and oxygen dissolved in liquid iron equilibrated with titanium oxides
- Authors
- Pak, Jong-Jin; Jo, Jong-Oh; Kim, Sun-In; Kim, Wan-Yi; Chung, Tae-In; Seo, Seok-Min; Park, Joo-Hyun; Kim, Dong-Sik
- Issue Date
- 2007
- Publisher
- IRON STEEL INST JAPAN KEIDANREN KAIKAN
- Keywords
- liquid iron; deoxidation; titanium; oxygen; titanium oxides; equilibrium constant; interaction parameter
- Citation
- ISIJ INTERNATIONAL, v.47, no.1, pp.16 - 24
- Indexed
- SCIE
SCOPUS
- Journal Title
- ISIJ INTERNATIONAL
- Volume
- 47
- Number
- 1
- Start Page
- 16
- End Page
- 24
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44329
- DOI
- 10.2355/isijinternational.47.16
- ISSN
- 0915-1559
- Abstract
- The equilibrium relation of Ti and 0 dissolved in liquid iron saturated with solid titanium oxides was measured in the temperature range of 1 823 to 1 923 K. Pure T2O3 (S) phase was identified as the equilibrium deoxidation product for iron melts containing 0.25-4.75 mass% Ti. Using Wagner's formalism, the present results were thermodynamically analyzed to determine the equilibrium constant of T deoxiclation reaction for the formation of pure T2O3 (s) and the first- and second-order interaction parameters between T and 0 given as follows in the temperature range of 1 823 to 1 923 K. [GRAPHICS] The equilibrium titanium oxide phase was identified as Ti3O5(s) for iron melts containing 0.0012-0.25 mass% Ti at 1 873 K. The equilibrium constant of T deoxidation reaction for the formation of pure Ti3O5 (s) were estimated as follows. [GRAPHICS] The activity coefficient of Ti in liquid iron at infinite dilution, gamma(Ti(s))degrees was assessed as 0.011, 0.014 and 0.018 at 1 823 K, 1 873 K and 1 923 K, respectively.
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