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Interatomic potentials for the Be-C-H system.

C Björkas1, N Juslin, H Timko

  • 1EURATOM-Tekes, Department of Physics, University of Helsinki, PO Box 43, FI-00014, Finland.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 12, 2011
PubMed
Summary
This summary is machine-generated.

New analytical bond-order potentials for beryllium compounds are introduced. These potentials accurately simulate plasma-wall interactions in fusion reactors and other non-equilibrium processes.

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Area of Science:

  • Materials Science
  • Computational Chemistry
  • Plasma Physics

Background:

  • Developing accurate interatomic potentials is crucial for simulating complex material behaviors.
  • Simulations of plasma-wall interactions in fusion reactors require potentials that capture reactive processes.

Purpose of the Study:

  • To present novel analytical bond-order potentials for beryllium (Be), beryllium carbide (Be2C), and beryllium hydride (BeH2).
  • To ensure these potentials are suitable for simulating non-equilibrium processes, including plasma-wall interactions.

Main Methods:

  • Potentials for Be and Be-C were fitted using ab initio calculations and experimental data for various atomic configurations.
  • Be-H parameters were determined using data from Be-H molecules and defects.
  • Sputtering, melting, and quenching simulations were conducted to validate potential transferability.

Main Results:

  • The developed potentials accurately describe beryllium and its compounds.
  • The Be-C potential effectively models the antifluorite Be2C structure.
  • Hydrocarbon interactions are successfully modeled using established Brenner potentials.

Conclusions:

  • The new analytical bond-order potentials are well-suited for simulating non-equilibrium processes involving beryllium-containing materials.
  • These potentials enhance the capability for modeling plasma-wall interactions in fusion reactor research.