Two phases nanocrystalline Cu-Ag-La alloy induced by crystallization of amorphous phase

J. S. Park, A. Inoue, A. P. Tsai, T. Masumoto

Research output: Contribution to journalArticle

Abstract

Crystallization has been studied in the amorphous Cu-Ag-La alloys by means of X-ray diffraction, differential scanning calorimeter and transmission electron microscopy. Amorphous Cu52Ag45La3 alloy was found to crystallize two distinct stages; first and second stages are due to primary crystallization of nanocrystalline fcc-Cu and fcc-Ag phases and growth of primary crystalline. The crystallization process is the typical nucleation and growth transformation. The n-values of JMA plot are in the range of 2.5 and 3, indicating a diffusion controlled growth in the eutectiod cells. Mechanical properties; σf and Hv, are clearly improved by the partial crystallization of amorphous phase.

Original languageEnglish
Pages (from-to)179-183
Number of pages5
JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
Volume42
Issue number1
Publication statusPublished - 1996 Mar

Keywords

  • Amorphous alloy
  • Copper-silver-lanthanum system
  • Insoluble type alloy
  • Partial crystallization
  • Two phases nanocrystalline

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys

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