Modeling of Medium-Range Order in Metallic Glasses: Calculation of X-Ray Scattering in a Ti sub 61 Cu sub 16 Ni sub 23 Glass

Fluctuations in the magnitude of the basic icosahedron are shown to influence the calculated X-ray scattering picture. It is possible to determine the dimensions of the icosahedron and to estimate the magnitude of the effective scattering volume approx 10 exp 3 A exp 3 . The X-ray scattering curve f...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1993-08, Vol.156-158, p.94-97
Main Author: Cervinka, L
Format: Article
Language:English
Online Access:Get full text
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Summary:Fluctuations in the magnitude of the basic icosahedron are shown to influence the calculated X-ray scattering picture. It is possible to determine the dimensions of the icosahedron and to estimate the magnitude of the effective scattering volume approx 10 exp 3 A exp 3 . The X-ray scattering curve for this metallic glass can be simulated by a set of icosahedral clusters which are described by two breathing parameters, P (contraction in the plane of pentagons and perpendicular to the icosahedral axis) and Q (contraction parallel with the icosahedral axis). A model is presented which is based on ordering of icosahedral clusters consisting of 49 atoms and which explains the high-temperature behaviour of the prepeak in the X-ray scattering intensity. Ti sub 61 Cu sub 16 N sub 23 is mentioned.
ISSN:0022-3093