By Weronika Walkosz
This thesis provides effects from a mixed atomic-resolution Z-contrast and annular bright-field imaging and electron power loss spectroscopy within the Scanning Transmission Electron Microscopy, in addition to first rules reviews of the interfaces among crystalline β−Si3N4 and amorphous (i) CeO2-x in addition to (ii) SiO2 intergranular movie (IGF). those interfaces are of a superb basic and technological curiosity simply because they play a big function within the microstructural evolution and mechanical houses of Si3N4 ceramics utilized in many hot temperature and strain applications. the most contribution of this paintings is its distinct description of the bonding features of light atoms, specifically oxygen and nitrogen, at those interfaces, which has now not been accomplished before. The atomic-scale details at the association of either gentle and heavy atoms is necessary for reasonable modeling of interface houses, equivalent to interface power and ion delivery, and should facilitate elevated keep watch over over the functionality of ceramic and semiconductor fabrics for a wide-range of applications.
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Atomic Scale Characterization and First-Principles Studies of Si₃N₄ Interfaces (Springer Theses) by Weronika Walkosz