Issue 15, 2008

Oxygen diffusion in nanocrystalline yttria-stabilized zirconia: the effect of grain boundaries

Abstract

The transport of oxygen in dense samples of yttria-stabilized zirconia (YSZ), of average grain size d ≈ 50 nm, has been studied by means of 18O/16O exchange annealing and secondary ion mass spectrometry (SIMS). Oxygen diffusion coefficients (D*) and oxygen surface exchange coefficients (k*) were measured for temperatures 673 ≤ T/K ≤ 973 at an oxygen partial pressure of 900 mbar. No evidence is found for fast diffusion along grain boundaries. Rather, the analysis indicates that grain boundaries hinder oxygen transport.

Graphical abstract: Oxygen diffusion in nanocrystalline yttria-stabilized zirconia: the effect of grain boundaries

Article information

Article type
Paper
Submitted
14 Dec 2007
Accepted
29 Jan 2008
First published
25 Feb 2008

Phys. Chem. Chem. Phys., 2008,10, 2067-2072

Oxygen diffusion in nanocrystalline yttria-stabilized zirconia: the effect of grain boundaries

R. A. De Souza, M. J. Pietrowski, U. Anselmi-Tamburini, S. Kim, Z. A. Munir and M. Martin, Phys. Chem. Chem. Phys., 2008, 10, 2067 DOI: 10.1039/B719363G

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