Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder

Yuichiro Koizumi, Takanori Tanaka, Yoritoshi Minamino, Nobuhiro Tsuji, Kiyoshi Mizuuchi, Yoshihira Ohkanda

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Nanocrystalline Fe-23 at%Al-6 at%C alloy powder was produced by mechanical alloying of the mixture of iron powder and aluminum powder (Fe-25 at%Al) with methanol, and was consolidated into fully dense compact by spark plasma sintering (SPS) at 1273 K. The compacts have nanocrystalline microstructure composed of mixture of α-phase grains and κ-carbide (Fe 3AlC) grains whose average grain size is about 50 nm. Although relatively large grains were also observed in places, their sizes were not over a few micrometers. The mechanisms of the densification and the structural evolution during the SPS process are discussed.

Original languageEnglish
Pages (from-to)1604-1612
Number of pages9
JournalMaterials Transactions
Volume44
Issue number8
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Aluminum
  • Carbide
  • FeAl
  • Iron
  • Mechanical alloying
  • Nanocrystal
  • Spark plasma sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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