Classical interatomic potential for Nb-alumina interfaces

K. Albe*, R. Benedek, D. N. Seidman, R. S. Averback

*Corresponding author for this work

Research output: Contribution to journalConference article

5 Scopus citations

Abstract

A modified-embedded-atom-method (MEAM) potential is derived for the ternary system Al-O-Nb in order to simulate the model oxide-metal interface sapphire-niobium. In the present work, MEAM parameters for Al and O given by Baskes were adopted, and the parameters for Nb are adjusted to match experimental data for pure Nb and calculated properties for Nb oxides and aluminides. The properties for niobium oxides and aluminides were obtained from local-density-functional-theory (LDFT) calculations. The resultant potential was tested in simulations for the Nb(111)/α-alumina(0001) interface. MEAM predictions of the work of separation and the interlayer relaxations for two interface terminations are in excellent agreement with LDFT calculations. The MEAM potential therefore appears suitable for large-scale computer simulation of oxide-metal interface properties.

Original languageEnglish (US)
Pages (from-to)AA4.3.1-AA4.3.6
JournalMaterials Research Society Symposium - Proceedings
Volume654
StatePublished - Dec 1 2001
EventStructure Property Relationships of Oxide Surfaces and Interfaces - Boston, MA, United States
Duration: Nov 27 2000Nov 29 2000

ASJC Scopus subject areas

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

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