Metastable states during reaction milling of hcp transition metals with hydrocarbon

M. Nagumo*, T. S. Suzuki, K. Tsuchida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The reaction process during milling of Zr and Ti with n-heptane has been investigated. Formation of a metastable intermediate phase characterized by fcc-like structure has been revealed at a certain milling time. It disappears upon heating with reversible appearance of the original hcp strucure. The amounts of H and C in the metal powders increase with milling time to a constant level at which stabilization of the intermediate phase takes place. The intermediate phase is presumably the stacking fault of hcp structure stabilized by H and C atoms as the precursor of the stable carbides. Dissociation of H from heptane precedes that of C. Site occupation is competitive between H and C, and stabilization of the intermediate phase during milling takes place by the increase of C content excluding H to sites with lower binding energy with H.

Original languageEnglish
Pages (from-to)581-586
Number of pages6
JournalMaterials Science Forum
Issue numberPART 1
Publication statusPublished - 1996


  • Mechanical Alloying
  • Mechanochemistry
  • Metastable State
  • Reaction Milling
  • Ti
  • Ti-Carbide
  • Ti-Hydride
  • Zr
  • Zr-Carbide
  • Zr-Hydride
  • n-Heptane

ASJC Scopus subject areas

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


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