Direct measurement of vacancy relaxation by dilatometry

Jaromir A. Kotzurek; Eva-Maria Steyskal; Bernd Oberdorfer; Anton Hohenwarter; Reinhard Pippan; Wolfgang Sprengel; Roland Würschum

doi:10.1063/1.4958895

Direct measurement of vacancy relaxation by dilatometry

Jaromir A. Kotzurek, Eva-Maria Steyskal, Bernd Oberdorfer, Anton Hohenwarter, Reinhard Pippan, Wolfgang Sprengel, Roland Würschum

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Abstract

A model is proposed for directly determining the volume of lattice vacancies by means of dilatometric measurements of the anisotropic irreversible length change which occurs during annealing of lattice vacancies at grain boundaries of shape-anisotropic crystallites. The model is tested using nanocrystalline Ni after the high-pressure torsion deformation which exhibits excess concentration of lattice vacancies and elongated crystallite shape. Different length changes upon annealing parallel and perpendicular to the elongation axis occur from which a vacancy volume can be derived.

Original language	English
Article number	021906
Number of pages	5
Journal	Applied physics letters
Volume	109.2016
Issue number	2
DOIs	https://doi.org/10.1063/1.4958895
Publication status	Published - 14 Jul 2016

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AU - Sprengel, Wolfgang

AU - Würschum, Roland

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Direct measurement of vacancy relaxation by dilatometry

Abstract

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