Heating rate dependence of Tg and Tx in Zr-based BMGs with characteristic structures

E. Matsubara, T. Ichitsubo, K. Itoh, T. Fukunaga, J. Saida, N. Nishiyama, H. Kato, A. Inoue

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Abstract

Heating rate dependence of glass transition and crystallization temperatures is applicable for evaluation of glass structural stability and also for discussion on the apparent activation energies for glass transition and crystallization. The glass-structure stabilities of the Zr-based BMGs (Zr50Cu40Al10, Zr70Cu20Al10 and Zr70Ni20Al10) and the conventional amorphous alloys (Zr70Cu30 and Zr70Ni30) are assessed by the densely packed glass structure as well as the complicated crystallization process. By the reverse Monte Carlo (RMC) simulation with X-ray and neutron diffraction data, it is shown that the densely packed structure is built by icosahedron-like clusters. In Zr65Al7.5Ni10Pd17.5 and Zr65Al7.5Ni10Cu17.5, the effect of Pd atoms on the glass structure is also described.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalJournal of Alloys and Compounds
Volume483
Issue number1-2
DOIs
Publication statusPublished - Aug 26 2009

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Keywords

  • Bulk metallic glass
  • Diffraction
  • Glass structure
  • Thermal analysis
  • Zirconium

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Matsubara, E., Ichitsubo, T., Itoh, K., Fukunaga, T., Saida, J., Nishiyama, N., Kato, H., & Inoue, A. (2009). Heating rate dependence of Tg and Tx in Zr-based BMGs with characteristic structures. Journal of Alloys and Compounds, 483(1-2), 8-13. https://doi.org/10.1016/j.jallcom.2008.07.225