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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1117

Title: Intrinsically localized vibrations and the mechanical properties of α-uranium.
Authors: Manley, ME
Yethiraj, M
Sinn, H
Volz, HM
Alatas, A
Lashley, JC
Hults, WL
Lander, GH
Thoma, DJ
Smith, JL
Keywords: Thermal Expansion
Plutonium
Uranium
Mechanical Vibrations
Ductility
Strains
Issue Date: 11-Oct-2007
Publisher: Elsevier
Citation: Manley, M. E., Yethiraj, M., Sinn, H., Volz, H. M., Alatas, A., Lashley, J. C., et al. (2007). Intrinsically localized vibrations and the mechanical properties of α-uranium. Journal of Alloys and Compounds, 444, 129-132.
Abstract: Recent experiments have indicated that the high-temperature properties of α-uranium may be strongly influenced by the formation of randomly distributed intrinsically localized vibrational modes, just a few atoms across in size. One observation was a loss of mechanical ductility that coincided with the formation of the intrinsically localized mode (ILM). Here, we consider this observation in more detail. In particular, we use the anisotropic thermal expansion behaviour to estimate the strains associated with each ILM and consider the implications for the forces between ILMs and the defects responsible for mechanical deformation. In the process we also suggest that an unusual transition from positive to negative thermal expansion along the [0 1 0] direction may be caused by the formation of ILMs. © 2007, Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.jallcom.2006.09.137
http://apo.ansto.gov.au/dspace/handle/10238/1117
ISSN: 0925-8388
Appears in Collections:Journal Articles

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