Site preference of refractory elements in γ′-Ni 3Al alloyed with Ru

Fei Sun, Jianxin Zhang, Yun Tian

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The influence of ruthenium (Ru) on the partitioning behavior of W, Re and Cr in -Ni3Al has been studied using the Dmol3 method based on the density functional theory. The calculated results show that W, Re and Cr have a preference for the Ni site in -Ni3Al alloyed with Ru. When Ru substitutes the central Ni atom, the site preference for W, Re and Cr varies. Furthermore, an electronic structure analysis of the alloy in terms of the Mulliken population and partial density of states was performed to elucidate the alloying mechanism of Ru in -Ni3Al. The results show that the strengthening effect of Ru in the alloy arises from a reduction in the binding energy of Ru as well as p-orbital hybridization between Ru and the host atoms.

Original languageEnglish
Pages (from-to)487-494
Number of pages8
JournalPhilosophical Magazine Letters
Volume92
Issue number9
DOIs
Publication statusPublished - 2012 Sep 1
Externally publishedYes

Keywords

  • Ni-based superalloys
  • atomic structure
  • computer simulation
  • electronic structure
  • nickel-aluminum alloys
  • ruthenium
  • site preference

ASJC Scopus subject areas

  • Condensed Matter Physics

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