Thermodynamic Evaluation of the system Ta–O and Preliminary Assessment of the Systems Al–Nb–O and Al–Ta–O

Autor: Julian Gebauer, Peter Franke, Hans Jürgen Seifert
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Advanced Engineering Materials, 24 (8), Art.-Nr. 2200162
ISSN: 1438-1656
1527-2648
DOI: 10.5445/ir/1000149162
Popis: The binary tantalum–oxygen system is assessed using the CALculation of PHase Diagrams (CALPHAD) method with experimental data from the literature. The oxygen solubility in the Ta solid-solution phase is discussed and modeled. The low- and high-temperature modifications of Ta₂O₅ are described as stoichiometric compounds. This dataset is extended into the ternary Al–Ta–O system by complementing it with binary datasets for Al–O and Al–Ta from the literature and adding mixed-oxide AlTaO₄. The dataset for the ternary system Al–Nb–O is created by combining the three corresponding binary datasets from the literature and by assessing the quasibinary section Al₂O₃–Nb₂O₅. The ternary aluminum niobates are described as stoichiometric compounds. Phase equilibria between refractory metals and alumina at high temperature are discussed.
Databáze: OpenAIRE
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