Crystallization and thermal properties of Zr-AI-Cu-Ni based amorphous alloy added with boron and silicon

J. S.C. Jang, S. C. Lu, L. J. Chang, T. H. Hung, J. C. Huang, C. Y.A. Tsao

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Abstract

The amorphous Zr65-x-yAl7.5 Cu17.5Ni 10SixBy alloy ribbons, x = 1 to 4 and y = 1 to 2, with 0.1 mm thickness were prepared by melt spinning. Both of Tg and Tx for Zr65-x-yAl7.5 Cu 17.5Ni10SixBy alloys increase with the silicon and boron additions and reaches 674 K and 754 K, respectively for Zr60Al7.5 Cu17.5Ni10Si 4B1 alloy. The highest Trg (0.62) and γ value (0.43) occur at the Zr60Al7.5Cu 17.5Ni10Si4B1 alloy. In addition, Zr60Al7.5Cu17.5Ni10Si 4B1 alloy was revealed to have the highest activation energy of crystallization about 370 kJ/mole, as determined by the Kissinger plot. This value is about 20% higher than the activation energy of crystallization for the Zr65Al7.5Cu17.5Ni 10) based alloy (314kJ/mole). In parallel, the alloy 4SilB also performs a longer incubation time at higher isothermally annealing temperature. All of the evidence implies that Zr60Al7.5 Cu 17.5Ni10Si4B1 alloy exhibits the highest thermal stability among those alloy systems in this study. The detail mechanism of crystallization will be discussed in this paper.

Original languageEnglish
Pages (from-to)201-204
Number of pages4
JournalJournal of Metastable and Nanocrystalline Materials
Volume24-25
DOIs
StatePublished - 2005

Keywords

  • And thermal properties
  • Bulk amorphous
  • Crystallization
  • Glass transition temperature
  • Zirconium-based alloy

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