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  4. The short-range-order of mechanically alloyed amorphous Ni-Zr. A comparison of experiment and simulation
 
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1989
Journal Article
Title

The short-range-order of mechanically alloyed amorphous Ni-Zr. A comparison of experiment and simulation

Other Title
Die Nahordnung von mechanisch legiertem amorphem Ni-Zr. Ein Vergleich von Experiment und Simulation
Abstract
Amorphous NixZr1-x powders were prepared by mechanical alloying in the composition range 0.2 equal or smaller than x equal or smaller than 0.7. Total atomic pair distribution functions G(r) and total radial distribution functions RDF(r) were derived from X-ray measurements. The atomic structure of the amorphous alloy was computer simulated by a mofified dense random packing of hard spheres (DRPHS) which allows an adjustable overlap of unequal spheres. The calculated packings were relaxed by a Morse potential and the total atomic pair distribution functions were computed taking into account the different X-ray visibilities of Ni and Zr. There is good agreement between experimentally determined and calculated short-range-order in the whole homogeneity range of the amorphous phase using next neighbour distances rNiNi=2.48 A, rZrZr=3.10 A and rNizr=2.65.
Author(s)
Petzoldt, F.
Burblies, A.
Journal
Journal of non-crystalline solids  
Language
English
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM  
Keyword(s)
  • amorphous state

  • chemical composition

  • computerized simulation

  • distribution function

  • hard-sphere model

  • interatomic distance

  • microstructure

  • morse potential

  • nickel alloy

  • powder

  • quantity ratio

  • short-range order

  • x-ray diffraction

  • zirconium alloy

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