Crystallisation by laser for Zr based bulk metallic glass

R. Ikutomo, M. Tsujikawa, M. Hino, H. Kimura, Kunio Yubuta, A. Inoue

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Bulk metallic glasses (BMGs) show high amorphous phase stability. The solidification process of BMG occurs with the cessation of epitaxial crystal growth. For a laser heated and melted surface of BMG, crystallisation occurs during cooling, along with crystalline growth from the heat affected zone. Such crystallisation stops at a certain location where the residual melt solidifies as amorphous. The amorphous formation can occur after crystal nucleation. Thermal treatment using a diode laser was used for surface modification of 2 mm thick Zr 55 Al 10 Ni 5 Cu 30 (at.-%) BMG plates. When laser conditions (scanning speed, defocused irradiated spot size and output power) were changed, the maximum temperature and heating cooling rate were changed, and microstructures were changed. Cessation of crystallisation was observed.

Original languageEnglish
Pages (from-to)148-151
Number of pages4
JournalInternational Journal of Cast Metals Research
Volume21
Issue number1-4
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • Bulk metallic glass
  • Crystallisation
  • Diode laser
  • Laser irradiation
  • Zr Al Ni Cu

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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