Crystallization behavior of Ti40Zr25Ni8 Cu9Be18 amorphous alloy

Jinna Mei, Jinshan Li, Hongchao Kou, Liqian Xing, Hengzhi Fu, Lian Zhou

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Ti-based bulk amorphous alloy with the composition of Ti40Zr25Ni8 Cu9Be18 of 3 mm in diameter was fabricated by suction casting method. The microstructure was investigated using X-ray diffraction (XRD), differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). In addition, the crystallization kinetics behavior and phase transition during crystallization process were studied by non-isothermal crystallization and isothermal anneal heat treatment, respectively. It is showed that the glass transition and crystallization behavior have the typical kinetic characteristics and better thermal stability with a supercooled liquid region ΔTx of 54 K and a phase transformation Ep1 of 213.04 kJ/mol, respectively, for the amorphous alloy. On the other hand, the process of crystallization contained two stages: in the first stage, the crystallization reactions correspond to the precipitation of quasicrystalline phase I in the amorphous matrix; in the second stage, the quasicrystalline phase I was transformed to Laves phase which is directly precipitated from the remaining amorphous matrix.

Original languageEnglish
Pages (from-to)1215-1218
Number of pages4
JournalXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume36
Issue number7
StatePublished - Jul 2007

Keywords

  • Bulk amorphous alloy
  • Crystallization
  • Phase transformation
  • Thermal stability
  • Ti-based amorphous alloy

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