Faster grain-boundary diffusion with a higher activation enthalpy than bulk diffusion in ionic space-charge layers

Physical Chemistry Chemical Physics, vol. 28, pp. 18582–18592

Abstract

With faster (v Sr v O ) associates in the bulk and slower v Sr isolated vacancies accumulating in space-charge layers, faster grain-boundary diffusion of Sr is shown to occur with a higher activation enthalpy of diffusion than in the bulk.

Authors 2

1. Timon F. Kielgas Aachen Institute of Physical Chemistry

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany

2. Roger A. De Souza Aachen Institute of Physical Chemistry

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany