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Electron Microscopical Investigation of Interdiffusion and Phase Formation at Gd2O3/CeO2- and Sm2O3/CeO2-Interfaces

Christian Rockenhäuser (Autor)

Buch | Softcover

XXIV, 102 Seiten

2015 | 2015
Springer Fachmedien Wiesbaden GmbH (Verlag)
978-3-658-08792-0 (ISBN)

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Christian Rockenhäuser adresses phase formation and cation interdiffusion of the GdxCe1-xO2-x/2-and SmxCe1-xO2-x/2-material systems at temperatures ranging from 970 to 1270°C. Diffusion couples with CeO2/Sm2O3 and CeO2/Gd2O3 interfaces were fabricated for the investigations. The resulting reaction phases were investigated utilizing transmission electron microscopy (TEM) and allow conclusions regarding the phase diagrams in the examined temperature range. A miscibility gap can be ruled out for GdxCe1-xO2-x/2 across the whole composition range. Cation interdiffusion coefficients were determined for both material systems by measuring and evaluating concentration profiles at the material interfaces. The activation enthalpies for interdiffusion were calculated using the temperature dependence of the interdiffusion coefficients. The study for the first time compiles comprehensively the previous results regarding the phase diagrams of the two material systems since 1923.

Christian Rockenhäuser studied Physics at the Karlsruhe Institute of Technology (KIT) and the Heriot-Watt University (UK). He investigated solid electrolytes at the Laboratory for Electron Microscopy (KIT) and then joined the Federal Institute for Materials Research and Testing.

Introduction.- Fundamentals.- Experimental Techniques and Instrumentation.- The Gd(x)Ce(1-x)O(2-x/2) System: Phase Formation and Cation Interdiffusion.- The Sm(x)Ce(1-x)O(2-x/2) System: Phase Formation and Cation Interdiffusion.- Summary.

Erscheint lt. Verlag	24.3.2015
Reihe/Serie	MatWerk
Zusatzinfo	XXIV, 102 p. 20 illus.
Verlagsort	Wiesbaden
Sprache	englisch
Maße	148 x 210 mm
Gewicht	178 g
Themenwelt	Naturwissenschaften ► Chemie ► Physikalische Chemie
	Technik ► Elektrotechnik / Energietechnik
	Technik ► Maschinenbau
Schlagworte	Ceria • Doped Cerium oxide • Interdiffusion • Phase diagram • Solid electrolytes • Transmission Electron Microscopy (TEM)
ISBN-10	3-658-08792-7 / 3658087927
ISBN-13	978-3-658-08792-0 / 9783658087920
Zustand	Neuware