Deformation behavior of Mo5SiB2

N. I. Medvedeva*, O. Y. Kontsevoi, A. J. Freeman, J. H. Perepezko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


First-principles calculations were employed to analyze the possible slip systems in Mo5SiB2. A striking result was obtained that the three most favorable slip systems, <100>(001), <110>(001) and [001]{010}, have close stacking fault energies, and the preference among them cannot be established. This finding explains a large variety of experimentally observed slip systems in Mo5SiB2. The dislocations associated with these slip systems may dissociate into partials joined with stacking faults and separated by the large splitting width of 5–6 nm.

Original languageEnglish (US)
Pages (from-to)54-57
Number of pages4
StatePublished - Nov 2017


  • Ab initio calculations
  • Dislocations
  • Molybdenum silicides
  • Stacking fault energy

ASJC Scopus subject areas

  • General Chemistry
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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