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A directionally-disordered precursor to amorphization in electron irradiated Cu4Ti3

Published online by Cambridge University Press:  31 January 2011

D.E. Luzzi
D.E. Luzzi
Affiliation:
Department of Materials Science and Laboratory for Research on the Structure of Matter, The University of Pennsylvania, Philadelphia, Pennsylvania 19104–6272
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Abstract

Evidence of directional structural disordering prior to complete amorphization of Cu4Ti3 during 2 MeV electron irradiation is presented. It is shown that the observed disordering is intrinsic to the irradiated material and is incommensurate with the structure of the crystalline compound. The results point to the presence of significant anisotropy in the response of the material to irradiation. A model based on local rotation of clusters of atoms within a partially chemically-disordered matrix is developed. These results are discussed in relation to recent proposed mechanisms of amorphization based on volume expansion. The questions raised by this work indicate a need for detailed studies of the atomic level structural evolution of a material during solid state amorphization.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 10 , October 1991 , pp. 2059 - 2068
Copyright
Copyright © Materials Research Society 1991

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