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Impact of intrinsic localized modes of atomic motion on materials properties

Recent neutron and X-ray scattering measurements show intrinsic localized modes (ILMs) in metallic uranium and ionic sodium iodide. Here, the role ILMs play in the behavior of these materials is examined. With the thermal activation of ILMs, thermal expansion is enhanced, made more anisotropic, and,...

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Published in:	Acta materialia 2010-05, Vol.58 (8), p.2926-2935
Main Author:	Manley, M.E.
Format:	Article
Language:	English
Subjects:	ANNEALING Applied sciences DIFFUSION ELECTRIC CONDUCTIVITY Exact sciences and technology INTERSTITIALS Intrinsic localized modes IONIC CONDUCTIVITY MATERIALS SCIENCE Mechanical properties Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy NEUTRONS PHASE TRANSFORMATIONS Point defects RADIATIONS RATCHETING SCATTERING SODIUM IODIDES THERMAL CONDUCTIVITY THERMAL EXPANSION TRANSPORT URANIUM
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container_title	Acta materialia
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creator	Manley, M.E.
description	Recent neutron and X-ray scattering measurements show intrinsic localized modes (ILMs) in metallic uranium and ionic sodium iodide. Here, the role ILMs play in the behavior of these materials is examined. With the thermal activation of ILMs, thermal expansion is enhanced, made more anisotropic, and, at a microscopic level, becomes inhomogeneous. Interstitial diffusion, ionic conductivity, the annealing rate of radiation damage, and void growth are all influenced by ILMs. The lattice thermal conductivity is suppressed at the ILM activation temperature, while no impact is observed in the electrical conductivity. This complement of transport properties suggests that ILMs could improve thermoelectric performance. Ramifications also include thermal ratcheting, a transition from brittle to ductile fracture, and possibly a phase transformation in uranium.
doi_str_mv	10.1016/j.actamat.2010.01.021
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source	Elsevier:Jisc Collections:Elsevier Read and Publish Agreement 2022-2024:Freedom Collection (Reading list)
subjects	ANNEALING Applied sciences DIFFUSION ELECTRIC CONDUCTIVITY Exact sciences and technology INTERSTITIALS Intrinsic localized modes IONIC CONDUCTIVITY MATERIALS SCIENCE Mechanical properties Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy NEUTRONS PHASE TRANSFORMATIONS Point defects RADIATIONS RATCHETING SCATTERING SODIUM IODIDES THERMAL CONDUCTIVITY THERMAL EXPANSION TRANSPORT URANIUM
title	Impact of intrinsic localized modes of atomic motion on materials properties
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