First trial of pulse electric current sintering for high-temperature material Ir3Nb

Y. Yamabe-Mitarai, H. Harada

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Pulse electric current sintering (PECS) was tried for Ir-25 at.% Nb (Ir3Nb), which has a high melting temperature of about 2435 °C. Ingot powder was made by crashing an ingot, and the ingot powders were sintered at temperatures between 1700 and 1900 °C up to 2 h under 40 MPa. Pure-metal powder was mixed to achieve a composition of Ir-25 at.% Nb, and the pure-metal powders were sintered at a temperature between 1700 and 1900 °C for up to 1 h. The microstructure and phase structures of sintered samples were investigated by scanning electron microscopy (SEM) and x-ray diffractometry. The sintering mechanism and problems for Ir3Nb in PECS are discussed.

Original languageEnglish
Pages (from-to)685-692
Number of pages8
JournalJournal of Materials Engineering and Performance
Volume10
Issue number6
DOIs
Publication statusPublished - 2001 Dec 1
Externally publishedYes

Keywords

  • Electric pulse sintering
  • Ir-Nb compound
  • Iridium
  • Sintering

ASJC Scopus subject areas

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

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