Development of nanocrystals in an amorphous alloy Zr47Ni30Ti23

S. Yi, W. T. Kim, D. H. Kim, S. H. Oh, C. G. Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Development of nanocrystals during crystallization of an amorphous alloy Zr47Ni30Ti23 is studied using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Up on heating the amorphous ribbon in DSC, three exothermic peaks including a broad peak are observed. Stable nanocrystals embedded in the amorphous matrix form through primary crystallization. The nanocrystals have uniform sizes after prolonged annealing at 400°C for 180 minutes. Ni plays an important role for the stability of the nanocrystals. Due to the Ni partitioning between the nanocrystals and the residual matrix, the crystallization temperature (Txl) of the residual amorphous matrix increases as crystallization proceeds. The formation of nanocrystal-amorphous composites that have high microstructural stability is possible through the controlled crystallization of the amorphous alloy Zr47Ni30Ti23.

Original languageEnglish
Pages (from-to)5101-5104
Number of pages4
JournalJournal of Materials Science
Volume36
Issue number21
DOIs
Publication statusPublished - 2001 Nov 1

All Science Journal Classification (ASJC) codes

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

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