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Article Dans Une Revue Applied Physics Letters Année : 2006

Grain-boundary resistivity versus grain size distribution in three-dimensional polycrystals

Résumé

We have studied the accuracy of the bricklayer model in the evaluation of the grain-boundary resistivity associated to a real three-dimensional (3D) polycrystal. An impedance network electrically equivalent to the 3D structure has been solved by direct calculation. In order to examine the progressive evolution from the bricklayer model to a completely disordered system, the ideal polycrystal was modified in a controlled way, according to a Voronoi diagram approach. From this, the grain-boundary resistivity of a polycrystal, as deduced from the 3D bricklayer model, is lower than the real value. The upper limit of the error made is around 15% in relation to the real one.
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Dates et versions

hal-00133266 , version 1 (24-02-2007)

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Citer

A. Morata, A. Tarancon, F. Peiro, Guilhem Dezanneau, Jr Morante, et al.. Grain-boundary resistivity versus grain size distribution in three-dimensional polycrystals. Applied Physics Letters, 2006, 88, pp.141920. ⟨10.1063/1.2189017⟩. ⟨hal-00133266⟩
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