Direct measurement of vacancy relaxation by dilatometry

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

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

Externe Organisationseinheiten

  • Technische Universität Graz
  • Erich-Schmid-Institut für Materialwissenschaft der Österreichischen Akademie der Wissenschaften

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.

Details

OriginalspracheEnglisch
Aufsatznummer021906
Seitenumfang5
FachzeitschriftApplied physics letters
Jahrgang109.2016
Ausgabenummer2
DOIs
StatusVeröffentlicht - 14 Juli 2016