Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-23T09:52:07.396Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

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