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X-Ray Line Broadening Study on Shock-Modified Hematite

Published online by Cambridge University Press:  06 March 2019

Y. Zhang ,
J. M. Stewart ,
B. Morosin ,
R. A. Graham  and
C. R. Hubbard
Y. Zhang
Affiliation:
University of Maryland College Park, MD 20742
J. M. Stewart
Affiliation:
University of Maryland College Park, MD 20742
B. Morosin
Affiliation:
Sandia national Laboratories Albuquerque, NM 87185
R. A. Graham
Affiliation:
Sandia national Laboratories Albuquerque, NM 87185
C. R. Hubbard
Affiliation:
National Bureau of Standards Gaithersburg, MD 20899
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Abstract

Hematite (α-Fe2O3) powder compacts have been subjected to controlled, quantitative high pressure shock loading at peak pressures from 8-27 GPa and preserved for post shook analysis. The broadened x-ray diffraction peak profiles have been analyzed to determine the residual lattice strain and the coherent crystallite sizes. Maximum modification effects are observed near 17 GPa with strain values near 3 x 10-3 and size values near 200 Å suggesting annealing at higher shock pressure, resulting from the higher shock temperature.

Type
III. X-Ray Stress/Strain Determination, Fractography, Diffraction, Line Broadening Analysis
Information
Advances in X-Ray Analysis , Volume 31: Thirty-Sixth Annual Conference on Applications of X-ray Analysis, August 3-7, 1987 , 1987 , pp. 287 - 294
Copyright
Copyright © International Centre for Diffraction Data 1987

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References

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