Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner

The aluminum-rich corner of the Al–Co–Pd ternary system was thermodynamically modeled by the CALPHAD method in the present study. The ternary system is a complex system with many ternary phases (W, V, F, U, Y2, C2). All ternary phases, except phase U, were modeled as stoichiometric compounds. The or...

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Autores principales: Viera Homolová, Aleš Kroupa
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/d72c6c1daeeb4c538f1303814323e784
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Sumario:The aluminum-rich corner of the Al–Co–Pd ternary system was thermodynamically modeled by the CALPHAD method in the present study. The ternary system is a complex system with many ternary phases (W, V, F, U, Y2, C2). All ternary phases, except phase U, were modeled as stoichiometric compounds. The order–disorder model was used to describe the BCC–B2 and BCC-A2 phases. Solubility of the third element in binary intermetallic phases (Al<sub>5</sub>Co<sub>2</sub>, Al<sub>3</sub>Co, Al<sub>9</sub>Co<sub>2</sub>, Al<sub>13</sub>Co<sub>4</sub>, Al<sub>3</sub>Pd and Al<sub>3</sub>Pd<sub>2</sub>) was modeled. The experimental results collected from the literature were used in the optimization of the thermodynamic parameters. A good agreement between the experimental results and the calculations was achieved.