The effect of Zr addition in glass forming ability of Ni-Nb alloy system

H. J. Chang, E. S. Park, Y. S. Jung, M. K. Kim, D. H. Kim

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The effect of Zr addition on glass forming ability (GFA) of Ni-Nb alloys has been investigated. Ni60Nb40-xZrx (x = 0-40) alloys were prepared by melt-spinning and injection-casting. Crystallization behavior of the alloys was studied by differential scanning calorimetry (DSC), differential thermal analyzer (DTA) and X-ray diffractometry (XRD). The GFA increased with the addition of Zr, thus, a rod with the diameter of 2 mm was obtained in Ni60Nb30Zr10 which has the highest reduced glass transition Trg value of 0.619 among the alloys investigated. When Zr content is more than 10 at.%, the GFA deteriorated significantly. The atomic structure of Ni-Nb-Zr alloys investigated by means of extended X-ray absorption fine structure (EXAFS), indicated presence of chemical inhomogeneity in the amorphous structure due to the positive mixing enthalpy between Zr and Nb.

Original languageEnglish
Pages (from-to)156-159
Number of pages4
JournalJournal of Alloys and Compounds
Issue numberSPEC. ISS.
Publication statusPublished - 2007 May 31

All Science Journal Classification (ASJC) codes

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

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