DISCLOSURE OF DOMAIN-STRUCTURE IN CUBIC CAXZR1-XO2-X, 0.15-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.20, BY TALBOT IMAGE-ENHANCEMENT OF HIGH-RESOLUTION ELECTRON-MICROGRAPHS

High-resolution electron microscope images have been recorded of several crystalline samples of calciastabilized zirconia (Ca-CSZ) and of the fluorite-related superstructure phase phi-1 (CaZr4O9). The contrast of the CSZ images has been enhanced markedly by the light-optical Talbot self-imaging technique. It is demonstrated that the CSZ crystals contain a coherent dispersion of microdomains approximately 30 angstrom in diameter, and that the structure of the microdomains is that of phi-1.