The partitioning and site preference of rhenium or ruthenium in model nickel-based superalloys: An atom-probe tomographic and first-principles study

Yang Zhou*, Zugang Mao, Christopher Booth-Morrison, David N. Seidman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

The partitioning behavior and sublattice site preference of Re or Ru in the Ni3Al(L12) γ′ - precipitates of model Ni-Al-Cr alloys are investigated by atom-probe tomography (APT) and first-principles calculations. Rhenium and Ru are experimentally observed to partition to the γ (fcc)-phase, which is consistent with the smaller values of the γ-matrix Re and Ru substitutional formation energies determined by first-principles calculations. APT measurements of the γ′-precipitate composition indicate that Re and Ru occupy the Al sublattice sites of the Ni3Al(L12) phase. The preferential site substitution of Re and Ru at Al sublattice sites is confirmed by first-principles calculations.

Original languageEnglish (US)
Article number171905
JournalApplied Physics Letters
Volume93
Issue number17
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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