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Thermodynamic evaluation of the Ta–O system from pure tantalum to tantalum pentoxide |
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| Authors: | Hyun Seon Hong Kyung Sub Lee |
| Affiliation: | Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea |
| Abstract: | The partial thermodynamic functions of the tantalum–oxygen system (up to O/Ta=2.5) were evaluated from 873 to 3120 K. The pressure–composition–temperature (p–C–T) relationship in the single-phase region of solid Ta was investigated. Relationships for other phases where no data are available in the literature were proposed based on thermodynamic analysis. The results are presented as oxygen isobars superimposed on a phase diagram. |
| Keywords: | Tantalum oxide Equilibrium oxygen pressure Phase diagram Thermodynamic constraints Analytical method |
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