The Ta-B system: Key experiments and thermodynamic modeling
| Autor: | Nicolas David, Carlos Angelo Nunes, Michel Vilasi, Antonio Augusto Araújo Pinto da Silva, Gilberto Carvalho Coelho, Belmira Benedita de Lima-Kühn, Jean-Marc Fiorani, Flávio Ferreira, Pauline Vilasi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science General Chemical Engineering Thermodynamics 02 engineering and technology General Chemistry Liquidus Invariant (physics) 021001 nanoscience & nanotechnology 01 natural sciences Computer Science Applications Formalism (philosophy of mathematics) 0103 physical sciences Standard enthalpy change of formation Solubility 0210 nano-technology CALPHAD Stoichiometry |
| Zdroj: | Calphad. 63:107-115 |
| ISSN: | 0364-5916 |
| DOI: | 10.1016/j.calphad.2018.08.012 |
| Popis: | In the present work, the Ta-B system was thermodynamically optimized based on the CALPHAD method using data of liquidus temperatures, invariant transformations and enthalpy of formation from the literature as well as new experiments performed in our group. The phases Ta3B2, TaB(rt), Ta5B6, Ta3B4 were modeled as stoichiometric compounds. On the other hand, L (liquid), BCC, Ta2B, TaB(ht) and TaB2 were modeled as solution phases using the Compound Energy Formalism (CEF), with excess terms described by the Redlich-Kister polynomials. (βB) was treated as a pure element without any Ta solubility. The present thermodynamic modeling is in good agreement with the experimental data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect