Crystallization behavior and kinetics of Cu-Zr-Al-Be bulk metallic glass

Yu Chan Kim, Eric Fleury, Hyun Kwang Seok, Pil Ryung Cha, Jae-chul Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The crystallization kinetics of the Cu43Zr43 Al7Be7 bulk metallic glass were studied by differential scanning calorimetry(DSC) in the continuous heating and isothermal annealing modes. Only one major peak could be detected on the DSC traces of Cu43Zr43 Al7Be7 bulk amorphous alloy, and the activation energy for crystallization corresponding to the peak determined by the Kissinger method was resulted of 239 kJ/mol. The isothermal kinetic, analyzed by the Johnson-Mehl-Avrami equation yielded values for the Avrami exponents in the range 1.69 to 2.37, which implied a crystallization governed by a three-dimensioned growth. Primary phases were essentially the cubic structure CuZr together with the Cu10Zr7 phase. At higher temperature, the CuZr disappeared while the Cu10Zr7 became predominant. After long term annealing at 731 K, the phases were Cu10Zr7, Cu2ZrAl and Al3Zr5.

Original languageEnglish
Pages (from-to)338-344
Number of pages7
JournalJournal of Korean Institute of Metals and Materials
Volume46
Issue number6
Publication statusPublished - 2008 Jun 1
Externally publishedYes

Fingerprint

Metallic Glasses
Metallic glass
Crystallization
Differential scanning calorimetry
Kinetics
Annealing
Isothermal annealing
Crystallization kinetics
Scanning
Amorphous alloys
Amorphous Alloy
Activation energy
Activation Energy
Heating
Exponent
Trace
Term
Range of data
Temperature

Keywords

  • Bulk metallic glass
  • Crystallization behavior
  • Cu-Zr-Al-Be alloy
  • Kinetics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Modelling and Simulation

Cite this

Crystallization behavior and kinetics of Cu-Zr-Al-Be bulk metallic glass. / Kim, Yu Chan; Fleury, Eric; Seok, Hyun Kwang; Cha, Pil Ryung; Lee, Jae-chul.

In: Journal of Korean Institute of Metals and Materials, Vol. 46, No. 6, 01.06.2008, p. 338-344.

Research output: Contribution to journalArticle

Kim, Yu Chan ; Fleury, Eric ; Seok, Hyun Kwang ; Cha, Pil Ryung ; Lee, Jae-chul. / Crystallization behavior and kinetics of Cu-Zr-Al-Be bulk metallic glass. In: Journal of Korean Institute of Metals and Materials. 2008 ; Vol. 46, No. 6. pp. 338-344.
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