Stabilizing the L12 structure of Pt3Al(r) in the Pt-Al-Sc system

R. Völkl, Y. Yamabe-Mitarai, C. Huang, H. Harada

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The Pt-Al system has high potential to act as alloy base for so-called refractory superalloys. Although the envisaged strengthening phase Pt3Al(r) has favorable L12 crystal structure only at high temperatures, even small amounts of Sc stabilized L12 crystal structure at low temperature. Pt-Al-Sc alloys were are melted, heat treated, and examined by means of scanning electron microscopy and X-ray diffraction (XRD). Pt3Al1-xScx(r) forms a continuous phase field from the Al-rich side to the Sc-rich side of the Pt-Al-Sc ternary system. The absolute value of the lattice misfit between cubic Pt3Al1-xScx(r) and the matrix decreases with increasing Sc content.

Original languageEnglish
Pages (from-to)2881-2892
Number of pages12
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume36
Issue number11
DOIs
Publication statusPublished - 2005 Nov

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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