Comparison of crystallization process of amorphous Zr2Ni alloy and metallic-Zr2Cu glass

D. Okai, T. Fukami, M. Asada, I. Noda, T. Yamasaki, Y. Yokoyama, A. Inoue

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Crystal nucleation and time evolution during isothermal annealing in amorphous Zr2Ni at several temperatures just below a crystallization temperature Tx and in supercooled liquid of metallic glass Zr 2Cu are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization at several temperatures is analyzed by the Johnson-Mehl-Avrami equation. The Avrami exponent is 3.0 ±0.2 for Zr2Ni and varies from about 3 to 7 for Zr 2Cu with increasing temperature. It is suggested for Zr2Ni that the crystal growth at temperatures just below Tx is ruled by a short range diffusion process of constituent elements. The time evolution of crystallized fraction was not well scaled by the half of complete time for full crystallization.

Original languageEnglish
Pages (from-to)1689-1693
Number of pages5
JournalMaterials Transactions
Volume48
Issue number7
DOIs
Publication statusPublished - 2007 Jul

Keywords

  • Avrami exponent
  • Crystal growth
  • Metallic glasses
  • Scaling law

ASJC Scopus subject areas

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

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