On the Size Distribution of Guinier-Preston Zones Grown in an Al-4.5 at.% Zn Alloy at Room Temperature

The size distribution SD of the Guinier-Preston (GP) zones grown in an Al-4.5 at.% Zn alloy were determined by analysis of the intensities of the small-angle X-ray scattering (SAXS) curves. Four different methods frequently used in the literature were applied and the obtained results were compared. In addition the SD's obtained by the SAXS methods were compared with that found by high-resolution electron microscopic investigations. – From these comparisons conclusions were drawn.