Formation of icosahedral phase from amorphous Zr65Al7.5Cu12.5Ni10Ag5 alloys

J. K. Lee, G. Choi, D. H. Kim, W. T. Kim

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The kinetic behavior of quasicrystalline phase formation in amorphous Zr65Al7.5CU12.5Ni10Ag5 alloys has been studied by using differential scanning calorimetry (DSC), x-ray diffractometry, and transmission electron microscopy. DSC trace obtained during continuous heating from 473 to 873 K shows two distinct exotherms with peak temperatures of 727 and 776 K. The first and second exothermic reactions, respectively, correspond to the formation of quasicrystalline phase from the amorphous matrix and the formation of tetragonal CuZr2 and hexagonal Zr6NiAl2 phases from the previously formed quasicrystalline phase. Partial replacement of Cu by Ag enhanced the formation of quasicrystalline phase from the amorphous structure. Johnson-Mehl-Avrami analysis of isothermal transformation data suggests that the formation of quasicrystalline phase is not entirely polymorphic in nature and may involve partitioning of solute at a later stage.

Original languageEnglish
Pages (from-to)978-980
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number7
DOIs
Publication statusPublished - 2000 Aug 14

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heat measurement
exothermic reactions
scanning
solutes
transmission electron microscopy
heating
kinetics
matrices
x rays
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Lee, J. K. ; Choi, G. ; Kim, D. H. ; Kim, W. T. / Formation of icosahedral phase from amorphous Zr65Al7.5Cu12.5Ni10Ag5 alloys. In: Applied Physics Letters. 2000 ; Vol. 77, No. 7. pp. 978-980.
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Formation of icosahedral phase from amorphous Zr65Al7.5Cu12.5Ni10Ag5 alloys. / Lee, J. K.; Choi, G.; Kim, D. H.; Kim, W. T.

In: Applied Physics Letters, Vol. 77, No. 7, 14.08.2000, p. 978-980.

Research output: Contribution to journalArticle

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