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The thermal fission-induced crystalline-to-amorphous transformation in U6Fe

Published online by Cambridge University Press:  31 January 2011

Don M. Parkin  and
Reed O. Elliott
Don M. Parkin
Affiliation:
Center for Materials Science, University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Reed O. Elliott
Affiliation:
Materials Science and Technology Division, University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Abstract

The crystalline-to-amorphous transformation in U6Fe produced by thermal fission fragment damage was studied using resistivity and differential scanning calorimetry. The results are described in terms of a model of radiation-produced defect buildup in the crystalline matrix followed by transformation of small regions to an amorphous phase when a critical local defect concentration is reached. This can occur directly in a single cascade or from cascade overlap. The total resistivity is modeled assuming an inhomogeneous media consisting of a crystalline matrix containing a dose-dependent concentration of defects and amorphous zones. The crystallization behavior is initially, starting at Tc = 388 K, a kinetically limited process of shrinkage of amorphous zones that gradually transforms to nucleation and growth in fully amorphous material at Tc = 555 K.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 3 , June 1988 , pp. 453 - 460
Copyright
Copyright © Materials Research Society 1988

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