Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys
Aluminum deoxidation equilibrium of molten Fe–Co alloy was experimentally measured using a chemical equilibrium method and numerically assessed using a sub-regular solution model based on Darken’s quadratic formalism and a Redlich-Kister type polynomial at 1873 K. It was found that the degree of oxy...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Nippon Tekko Kyokai/Iron and Steel Institute of Japan
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/90245 |
| _version_ | 1848765354469228544 |
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| author | Gamutan, Jonah Akaishi, Kosei Sato, Takahiro Miki, Takahiro |
| author_facet | Gamutan, Jonah Akaishi, Kosei Sato, Takahiro Miki, Takahiro |
| author_sort | Gamutan, Jonah |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Aluminum deoxidation equilibrium of molten Fe–Co alloy was experimentally measured using a chemical equilibrium method and numerically assessed using a sub-regular solution model based on Darken’s quadratic formalism and a Redlich-Kister type polynomial at 1873 K. It was found that the degree of oxygen content reduction by Al-deoxidation decreased with increasing cobalt concentration in the alloy, peaking at around 40 to 60 mass% Co, and then improved with further increase in cobalt concentration. The following binary interaction parameters between cobalt and aluminum were derived in this study:
0ΩCo-Al = -387360 [J/mol], 1ΩCo-Al = 309420 [J/mol]
It was also found that the above binary interaction parameters can accurately determine Al-deoxidation equilibrium of pure liquid cobalt. Finally, the critical point at which Al2O3 and CoO·Al2O3 coexist throughout the whole composition range of the alloy was also estimated from the experimental results in this study. |
| first_indexed | 2025-11-14T11:33:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-90245 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:33:55Z |
| publishDate | 2022 |
| publisher | Nippon Tekko Kyokai/Iron and Steel Institute of Japan |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-902452023-02-22T06:48:42Z Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys Gamutan, Jonah Akaishi, Kosei Sato, Takahiro Miki, Takahiro Al-deoxidation equilibrium Fe–Co alloys quadratic formalism Redlich-Kister polynomial Aluminum deoxidation equilibrium of molten Fe–Co alloy was experimentally measured using a chemical equilibrium method and numerically assessed using a sub-regular solution model based on Darken’s quadratic formalism and a Redlich-Kister type polynomial at 1873 K. It was found that the degree of oxygen content reduction by Al-deoxidation decreased with increasing cobalt concentration in the alloy, peaking at around 40 to 60 mass% Co, and then improved with further increase in cobalt concentration. The following binary interaction parameters between cobalt and aluminum were derived in this study: 0ΩCo-Al = -387360 [J/mol], 1ΩCo-Al = 309420 [J/mol] It was also found that the above binary interaction parameters can accurately determine Al-deoxidation equilibrium of pure liquid cobalt. Finally, the critical point at which Al2O3 and CoO·Al2O3 coexist throughout the whole composition range of the alloy was also estimated from the experimental results in this study. 2022 Journal Article http://hdl.handle.net/20.500.11937/90245 10.2355/isijinternational.ISIJINT-2021-267 http://creativecommons.org/licenses/by-nc-nd/4.0/ Nippon Tekko Kyokai/Iron and Steel Institute of Japan fulltext |
| spellingShingle | Al-deoxidation equilibrium Fe–Co alloys quadratic formalism Redlich-Kister polynomial Gamutan, Jonah Akaishi, Kosei Sato, Takahiro Miki, Takahiro Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title | Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title_full | Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title_fullStr | Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title_full_unstemmed | Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title_short | Aluminum Deoxidation Equilibrium in Molten Fe–Co Alloys |
| title_sort | aluminum deoxidation equilibrium in molten fe–co alloys |
| topic | Al-deoxidation equilibrium Fe–Co alloys quadratic formalism Redlich-Kister polynomial |
| url | http://hdl.handle.net/20.500.11937/90245 |