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Measurement of Atomic Elastic Constants by Pulsed Neutron Powder Diffraction

Published online by Cambridge University Press:  06 March 2019

A. C. Lawson ,
G. H. Kwei ,
J. A. Goldstone ,
B. Cort ,
R. I. Sheldon ,
E. Foltyn ,
J. Vaninetti ,
D. T. Eash ,
R. J. Martinez  and
J. I. Archuleta
A. C. Lawson
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
G. H. Kwei
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
J. A. Goldstone
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
B. Cort
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
R. I. Sheldon
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
E. Foltyn
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
J. Vaninetti
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
D. T. Eash
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
R. J. Martinez
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
J. I. Archuleta
Affiliation:
Los Alamos National Laboratory Los Alamos, NM 87545
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Abstract

We have developed a technique for determining the atomic elastic constants from measurements of the Debye-Waller factors. The Debye-Waller factors are obtained by Rietveld refinement of time-of-flight neutron diffraction data and interpreted in terms of an atomic Debye-Waller temperature. The method is applicable to powders and to materials that must be encapsulated for safety or environmental reasons. We will illustrate our technique with applications to actinide metals, to metallic hydrides and to high-temperature superconductors.

Type
IX. Stress and Strain Determination by Diffraction Methods, Peak Broadening Analysis
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 577 - 583
Copyright
Copyright © International Centre for Diffraction Data 1992

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References

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