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A Study of Guinier-Preston Zone Growth Kinetics Through the Use of X-Ray Small-Angle Scattering*

Published online by Cambridge University Press:  06 March 2019

Samuel D. Harkness  and
Robert W. Gould
Samuel D. Harkness
Affiliation:
Argonne National Laboratory, Argonne, Illinois
Robert W. Gould
Affiliation:
University of Florida, Gainesville, Florida
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Abstract

The relation of the X-ray small-angle scattering parameters to the results of transmission electron microscopy for spherical Guinier-Preston zones was investigated. Experimentally, the Guinier radius is found to equal (<R7>/<R5>1/2) and the Porod radius to equal <R3>/<R2>. These results were theoretically predicted by Baur and Gerold, A log normal distribution was found to be in close agreement with the experimental data. The use of this distribution allowed the size-distribution curve of spherical Guinier-Preston zones to be constructed from the X-ray parameters and from a knowledge of the metastable miscibility gap. This approach is used to follow the evolution of size distribution in both Al-Ag and Al-Zn alloys. The application of this approach to nncleation and growth as well as redistribution processes is discussed. Growth paths are established from the size distribution evolution curves through an Nv> construction. A brief discussion of the technique is included.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 12: Seventeenth Annual Conference on Applications of X-ray Analysis, August 21-23, 1968 , 1968 , pp. 97 - 112
Copyright
Copyright © International Centre for Diffraction Data 1968

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Footnotes

*

This work performed under Air Fores Contract No. AF-AFOSR-l142-66.

*

This work performed under Air Fores Contract No. AF-AFOSR-1142-66.

References

1. Harkness, S. D., Gould, R. W., and Hren, J. J., “A Critical Evaluation of X-ray Small Angle Scattering Parameters”, Phil. Mag., in the press.Google Scholar
2. Gerold, V., “The Zone Formation in Aluminum-Zinc Alloys”, Phys. stat. solidi, 1: 37, 1961.Google Scholar
3. Baur, R. and Gerold, V., “Comparative X-ray and Electron Microscopy Studies of the Size of Guinier-Preston Zones in Aluminum- Silver”, Acta Met. 12: 1448, 1964.Google Scholar
4. Hilliard, J. E., “The Counting and Sizing of Partials in Transmission Microscopy”, TAIME 224: 906, 1962.Google Scholar
5. DeHoff, R. T., “The Estimation of Particle- Size Distributions from Simple Counting Measurements Made on Random Plane Sections”, TAME 233: 25, 1965.Google Scholar
6. Borelius, G., Defects in Crystalline Solids, 169, Phys. Soc, London 1955.Google Scholar
7. DeHoff, R. T., Private communication.Google Scholar