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An n-body potential for a Zr-Nb system based on the embedded-atom method
De-Ye Lin1, S S Wang, D L Peng
1State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 12, 2013
Summary
A new n-body potential for zirconium-niobium (Zr-Nb) alloys was developed using the embedded-atom method. This model accurately predicts alloy properties and formation energies, outperforming previous potentials.
Area of Science:
- Materials Science
- Computational Materials Science
- Condensed Matter Physics
Background:
- Developing accurate interatomic potentials is crucial for simulating material properties.
- Zirconium-niobium (Zr-Nb) alloys are important in various industrial applications.
- Existing potentials may not fully capture the complex interactions in Zr-Nb systems.
Purpose of the Study:
- To develop a novel n-body potential for the Zr-Nb system within the embedded-atom method framework.
- To validate the potential against experimental data and first-principles calculations.
- To investigate the ground state properties and formation energies of Zr-Nb alloys.
Main Methods:
- Development of an n-body potential using the embedded-atom method.
- Parameter fitting to experimental and first-principles data for pure Zr, Nb, and alloys.
- Calculation of static thermodynamic properties, ground state properties, and formation energies.
- Comparison with previous potential models and advanced computational methods (e.g., special quasirandom structures, Miedema-ZSL-07).
Main Results:
- The developed n-body potential accurately reproduces static thermodynamic properties of Zr and Nb.
- The potential shows improved agreement with experimental data compared to existing models.
- Calculated ground state properties of Zr-Nb alloys align well with first-principles results.
- Formation energies for body-centered cubic (bcc) and hexagonal close-packed (hcp) Zr-Nb solid solutions are effectively described.
Conclusions:
- The novel n-body potential provides an effective description of interactions in Zr-Nb alloys.
- This potential is suitable for simulating Zr-Nb systems, particularly for hcp-bcc interactions.
- The developed model enhances the predictive capability for alloy behavior and properties.
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