A ternary EAM interatomic potential for U-Mo alloys with xenon

D. E. Smirnova, A. Yu Kuksin, S. V. Starikov, V. V. Stegailov, Z. Insepov, J. Rest, A. M. Yacout

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

A new interatomic potential for a uranium-molybdenum system with xenon is developed in the framework of an embedded atom model using a force-matching technique and a dataset of ab initio atomic forces. The verification of the potential proves that it is suitable for the investigation of various compounds existing in the system as well as for simulation of pure elements: U, Mo and Xe. Computed lattice constants, thermal expansion coefficients, elastic properties and melting temperatures of U, Mo and Xe are consistent with the experimentally measured values. The energies of the point defect formation in pure U and Mo are proved to be comparable to the density-functional theory calculations. We compare this new U-Mo-Xe potential with the previously developed U and Mo-Xe potentials. A comparative study between the different potential functions is provided. The key purpose of the new model is to study the atomistic processes of defect evolution taking place in the U-Mo nuclear fuel. Here we use the potential to simulate bcc alloys containing 10 wt% of intermetallic Mo and U2Mo.

Original languageEnglish
Article number035011
JournalModelling and Simulation in Materials Science and Engineering
Volume21
Issue number3
DOIs
Publication statusPublished - Apr 2013

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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