Evaluation of the Thermodynamic Properties and Phase Equilibria of the Ordered γ′ and Disordered γ Phases in the Ni-Al-Ta System

Shihuai Zhou, Long-qing Chen, Rebecca A. MacKay, Zi-kui Liu

Research output: Contribution to journalConference article

Abstract

The phase equilibria and thermodynamic properties of the ternary Ni-Al-Ta system on Ni-rich side were analyzed. Thermodynamic descriptions of the liquid, γ-fcc, γ′-L12, and π-Ni6AlTa phases were obtained using the CALPHAD (CALculation of PHase Diagrams) technique. The thermodynamics of γ-fcc and γ′-L12 phases were modeled with a single Gibbs energy function taking into account the crystallographic relation between the two phases. The ternary interaction parameters of the liquid and fee phases were also determined. The calculated phase diagrams of the ternary Ni-Al-Ta system show a good agreement with experimental data.

Original languageEnglish (US)
Pages (from-to)443-450
Number of pages8
JournalMaterials Research Society Symposium - Proceedings
Volume755
StatePublished - Nov 10 2003
EventSolid-State Chemistry of Inorganic Materials IV - Boston, MA, United States
Duration: Dec 2 2002Dec 6 2002

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Phase equilibria
Phase diagrams
Thermodynamic properties
thermodynamic properties
phase diagrams
Thermodynamics
thermodynamics
evaluation
Liquids
Gibbs free energy
liquid phases
liquids
interactions
energy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Evaluation of the Thermodynamic Properties and Phase Equilibria of the Ordered γ′ and Disordered γ Phases in the Ni-Al-Ta System",
abstract = "The phase equilibria and thermodynamic properties of the ternary Ni-Al-Ta system on Ni-rich side were analyzed. Thermodynamic descriptions of the liquid, γ-fcc, γ′-L12, and π-Ni6AlTa phases were obtained using the CALPHAD (CALculation of PHase Diagrams) technique. The thermodynamics of γ-fcc and γ′-L12 phases were modeled with a single Gibbs energy function taking into account the crystallographic relation between the two phases. The ternary interaction parameters of the liquid and fee phases were also determined. The calculated phase diagrams of the ternary Ni-Al-Ta system show a good agreement with experimental data.",
author = "Shihuai Zhou and Long-qing Chen and MacKay, {Rebecca A.} and Zi-kui Liu",
year = "2003",
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T1 - Evaluation of the Thermodynamic Properties and Phase Equilibria of the Ordered γ′ and Disordered γ Phases in the Ni-Al-Ta System

AU - Zhou, Shihuai

AU - Chen, Long-qing

AU - MacKay, Rebecca A.

AU - Liu, Zi-kui

PY - 2003/11/10

Y1 - 2003/11/10

N2 - The phase equilibria and thermodynamic properties of the ternary Ni-Al-Ta system on Ni-rich side were analyzed. Thermodynamic descriptions of the liquid, γ-fcc, γ′-L12, and π-Ni6AlTa phases were obtained using the CALPHAD (CALculation of PHase Diagrams) technique. The thermodynamics of γ-fcc and γ′-L12 phases were modeled with a single Gibbs energy function taking into account the crystallographic relation between the two phases. The ternary interaction parameters of the liquid and fee phases were also determined. The calculated phase diagrams of the ternary Ni-Al-Ta system show a good agreement with experimental data.

AB - The phase equilibria and thermodynamic properties of the ternary Ni-Al-Ta system on Ni-rich side were analyzed. Thermodynamic descriptions of the liquid, γ-fcc, γ′-L12, and π-Ni6AlTa phases were obtained using the CALPHAD (CALculation of PHase Diagrams) technique. The thermodynamics of γ-fcc and γ′-L12 phases were modeled with a single Gibbs energy function taking into account the crystallographic relation between the two phases. The ternary interaction parameters of the liquid and fee phases were also determined. The calculated phase diagrams of the ternary Ni-Al-Ta system show a good agreement with experimental data.

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VL - 755

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EP - 450

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

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