Analysis of nanoscale fluid inclusions in geomaterials by atom probe tomography: Experiments and numerical simulations

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Renell Dubosq
  • B Gault
  • C Hatzoglou
  • K Schweinar
  • F Vurpillot
  • A Rogowitz
  • D Schneider

Externe Organisationseinheiten

  • University of Ottawa
  • Universität Wien
  • Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf
  • Imperial College London
  • Normandie Université

Abstract

The spatial correlation between defects in crystalline materials and trace element segregation plays a fundamental role in determining the physical and mechanical properties of a material, which is particularly important in naturally deformed materials. Herein, we combine electron backscatter diffraction, electron channelling contrast imaging, scanning transmission electron microscopy and atom probe tomography on a naturally occurring metal sulphide in an attempt to document mechanisms of element segregation in a brittle-dominated deformation regime. Within APT reconstructions, features with a high point density comprising O-rich discs stacked over As-rich spherules are observed. The combined microscopy data allow us to interpret these as nanoscale fluid inclusions. Our observations are confirmed by simulated APT experiments of core-shell particles with a core exhibiting a very low evaporation field and the shell emulating a segregated layer at the inclusion interface. Our data has significant trans-disciplinary implications to the geosciences, the material sciences, and analytical microscopy.

Details

OriginalspracheEnglisch
Aufsatznummer113092
Seitenumfang10
FachzeitschriftUltramicroscopy
Jahrgang218.2020
AusgabenummerNovember
Frühes Online-Datum5 Aug 2020
DOIs
StatusVeröffentlicht - Nov 2020