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Influence of Dislocations on Deuteride Formation in Single Crystal Palladium

Published online by Cambridge University Press:  21 March 2011

W.C. Chen  and
Brent J. Heuser
W.C. Chen
Affiliation:
Dept. Nuclear, Plasma, and Radiological Engineering, University of Illinois 214 Nuclear Engineering Lab, 103 S. Goodwin Ave., Urbana, IL 61801
Brent J. Heuser
Affiliation:
Dept. Nuclear, Plasma, and Radiological Engineering, University of Illinois 214 Nuclear Engineering Lab, 103 S. Goodwin Ave., Urbana, IL 61801
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Abstract

The effect of dislocations on deuteride formation in the Pd-D system has been investigated with small-angle neutron scattering (SANS). Deuteride precipitation morphologies in well-annealed single crystal Pd and deformed single crystal Pd have been determined with SANS. High densities of dislocations were introduced into the deformed sample by cycling across the deuteride miscibility gap. The characteristic response from small, 20-30 Angstrom thick, plate-like particles has been observed in the SANS measurement of both sample types. We believe these small plates act as precursors to the formation of much larger, tens-of-microns thick incoherent plate-like particles. These much larger deuteride plates have a preferred habit plane that depends on sample type; (100) for the well-annealed matrix and (110) for the deformed matrix.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 652: Symposium Y – Influences of Interface & Dislocation Behavior on Microstructure Evolution , 2000 , Y8.4
Copyright
Copyright © Materials Research Society 2001

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References

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