Electron microscopical investigation of interdiffusion and phase formation at Gd₂O₃'CeO₂- and Sm₂O₃'CeO₂- interfaces [electronic resource] / Christian Rockenḧauser ; with a foreword by Prof. Dr. Dagmar Gerthsen.

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Electron microscopical investigation of interdiffusion and phase formation at Gd₂O₃'CeO₂- and Sm₂O₃'CeO₂- interfaces [electronic resource] / Christian Rockenḧauser ; with a foreword by Prof. Dr. Dagmar Gerthsen.

9783658087937 electronic book
3658087935 electronic book
9783658087920

Wiesbaden : Springer, [2015]

English

1 online resource : illustrations.

10.1007/978-3-658-08793-7 doi

TK2931 .R63 2015eb

621.312429

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.

"Dissertation, Karlsruhe Institute of Technology (KIT), 2014."

Includes bibliographical references.

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Online resource; title from PDF title page (viewed March 26, 2015).

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Print version: 9783658087920

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