Microstructural evolutions during HDDR phenomena in Sm2Fe17Nx compounds

M. Okada, K. Saito, H. Nakamura, S. Sugimoto, M. Homma

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Microstructural evolutions during HDDR phenomena in Sm2Fe17 particles were observed by transmission electron microscopy. Sm2Fe17 compounds heat-treated over 510°C in a H2 atmosphere disproportionate into SmH2 and α-Fe phases with crystal relationship of α-Fe {110} // SmH2 {111}. Recombination reactions were initiated by desorbing hydrogen from SmH2 phases, and α-Fe phases diffuse into SmH2 particles to form Sm2 + δFe17 phases by recombination. Prolonged aging in vacuum forms Sm2Fe17 fine grains of 100-300 nm in diameter.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 1995 Dec 15


  • Disproportionation
  • HDDR phenomena
  • Recombination
  • SmFe compound
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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