Determination of Size Distribution of Guinier--Preston Zones in Al--Ag Alloys by Small-Angle X-ray Scattering Method
B. Bierska and L. Paj±k
Institute of Physics and Chemistry of Metals University of Silesia, Bankowa 12, 40-007 Katowice, Poland
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Small-angle X-ray scattering method recognised to be very useful in the studies of structural problems of materials inhomogeneous in nanoscale. Studies by small-angle X-ray scattering on the Al--Ag alloys are presented. The size distributions of spherical Guinier--Preston zones were calculated using Vonk's and Glatter's methods. Small-angle X-ray scattering studies were performed on Al--5.0 at.%Ag alloy containing spherical Guinier--Preston zones in the η-state. For this alloy one can assume that scattering particles are of spherical shape, have uniform electron density and scatter independently. Moreover, the size distributions were calculated for Al--1.6 at.%Ag alloy containing Guinier--Preston zones in ϵ-state (scattering particles with not uniform electron density). Both, Vonk's and Glatter's, methods gave similar size distributions. Profiles of size distributions for Guinier--Preston zones in ϵ-state are more complex in comparison to Guinier--Preston zones in η-state. It is connected with a complex structure of Guinier--Preston zones in ϵ-state. A modification of the structure model of Guinier--Preston zones in ϵ-state is proposed.
DOI: 10.12693/APhysPolA.102.227
PACS numbers: 61.10.Eq, 81.40.Cd, 64.75.+g