Enhanced 95Zr diffusion in grain boundaries of nano-crystalline ZrO2·9.5 mol% Y2O3

The 95Zr cation self‐diffusivity in fully‐dense, nanocrystalline cubic ZrO2·9.5 mol% Y2O3 (n‐YSZ, mean grain size 50 nm) has been studied by tracer self‐diffusion and precision‐grinding sectioning. In the temperature range of 897 °C to 937 °C the 95Zr diffusion coefficient in grain boundaries was fo...

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Veröffentlicht in:	Physica status solidi. A, Applications and materials science Applications and materials science, 2009-01, Vol.206 (1), p.54-58
Hauptverfasser:	Drings, Harald, Brossmann, Ulrich, Carstanjen, Heinz-Dieter, Szökefalvi-Nagy, Ágnes, Noll, Cornelia, Schaefer, Hans-Eckhardt
Format:	Artikel
Sprache:	eng
Schlagworte:	61.46.Hk 66.30.H 66.30.Pa 81.05.Je Condensed matter: structure, mechanical and thermal properties Diffusion in solids Exact sciences and technology Physics Self-diffusion and ionic conduction in nonmetals Transport properties of condensed matter (nonelectronic)
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Zusammenfassung:	The 95Zr cation self‐diffusivity in fully‐dense, nanocrystalline cubic ZrO2·9.5 mol% Y2O3 (n‐YSZ, mean grain size 50 nm) has been studied by tracer self‐diffusion and precision‐grinding sectioning. In the temperature range of 897 °C to 937 °C the 95Zr diffusion coefficient in grain boundaries was found to be about 7 orders of magnitude higher than in single crystals of similar composition. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	1862-6300 1862-6319
DOI:	10.1002/pssa.200824077