Electron microscopy and X-ray diffraction studies of rapidly quenched ZrNi and HfNi ribbons with about 90 at.% Ni

Á Cziráki, B. Fogarassy, G. Van Tendeloo, P. Lamparter, M. Tegze, I. Bakonyi

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Abstract

The structure of melt-spun ribbons of the alloys Zr9Ni91, Zr10Ni90 and Hf11Ni89 was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Ribbons of the Zr9Ni91 and Zr10Ni90 alloys prepared at a high cooling rate (ribbon thickness d=11 μm) were characterized by an amorphous matrix with a few per cent of quenched-in crystallites. The ribbon of the Hf11Ni89 alloy prepared with the same thickness (i.e. at the same cooling rate) exhibited a nanocrystalline grain structure of the HfNi5 phase. Thicker ribbons of the Zr9Ni91 alloy (d=17-22 μm), for which the quench rate was correspondingly lower, were obtained as a b.c.c. Ni(Zr) solid solution phase with a grain size of nearly 1 μm. A high resolution (HR) TEM study of one of the Zr9Ni91 crystalline ribbons revealed a fine structure of the interior of the crystallites which can be attributed to an ordering on the Zr sublattice over distances of several nanometres within the b.c.c. grains.

Original languageEnglish
Pages (from-to)135-141
Number of pages7
JournalJournal of Alloys and Compounds
Volume210
Issue number1-2
DOIs
Publication statusPublished - Aug 1994

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ASJC Scopus subject areas

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

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