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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31 Citations (Scopus)

Abstract

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
Volume434-435
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 May 31

Bibliographical note

Funding Information:
This work was supported by the Creative Research Initiatives of the Korean Ministry of Science and Technology. We are grateful to authorities concerned of Pohang Light Source (PLS) for XAS measurements.

All Science Journal Classification (ASJC) codes

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

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