Ir-based refractory superalloys by pulse electric current sintering (PECS) process (II prealloyed powder)

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

Research output: Contribution to journalArticlepeer-review

Abstract

Five prealloyed powder samples prepared from binary Ir-based refractory superalloys were sintered at 1800 °C for 4 h by Pulse Electric Current Sintering (PECS). No metal loss was observed during sintering. The relative densities of the sintered specimens all exceeded 90% T.D. The best one was Ir-13% Hf with the density of 97.82% T.D. Phases detected in sintered samples were in accordance with the phase diagram as expected. Fractured surfaces were observed in two samples (Ir-13% Hf and Ir-15% Zr). Some improvements obtained by using prealloyed powders instead of elemental powders, which were investigated in the previous studies, were presented.

Original languageEnglish
Pages (from-to)32-36
Number of pages5
JournalJournal of Materials Engineering and Performance
Volume11
Issue number1
DOIs
Publication statusPublished - 2002 Feb 1
Externally publishedYes

Keywords

  • prealloyed powders
  • pulse electric current sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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