Synthesis of non-equilibrium phases in immiscible metals mechanically mixed by high pressure torsion

Tatsuya Miyazaki, Daisuke Terada, Yoji Miyajima, Challapalli Suryanarayana, Reiko Murao, Yoshihiko Yokoyama, Kazumasa Sugiyama, Minoru Umemoto, Yoshikazu Todaka, Nobuhiro Tsuji

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The structural changes in mechanically mixed metals of immiscible combinations of elements caused by bulk mechanical alloying (MA) through the use of high pressure torsion (HPT) were investigated in Ag-Ni and Nb-Zr systems. There was no alloying between Ag and Ni on atomic scale even after 100 rotations of HPT. On the other hand, the β-Zr phase started to appear after HPT 2 rotations in the Nb-Zr system, even though β-Zr is a high temperature phase. Further, Nb and Zr were completely mixed to form a bcc structured single phase after HPT 100 rotations. The sequence of alloying in the Nb-Zr system during HPT was discussed. These results clearly suggest that non-equilibrium phases can form in the Nb-Zr system by bulk MA by the use of HPT.

Original languageEnglish
Pages (from-to)4296-4301
Number of pages6
JournalJournal of Materials Science
Volume46
Issue number12
DOIs
Publication statusPublished - 2011 Jun 1

ASJC Scopus subject areas

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

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