John Daniels
School of Materials Science and Engineering
UNSW Australia

Experimental observations of grain-scale interactions in electroceramics

Location: EB1 Room 1011

Friday, January 16th 2015 - 11:00 am

Fundamental understanding of electro-mechanical properties of ceramics requires detailed multi-length-scale analysis methods. Previously, information of the grain-scale interactions of elastic strain and domain behaviour under electric fields have been unobtainable from the bulk of an electro-ceramic material. Here, grain resolved synchrotron x-ray scattering methods have been developed to investigate the phase and domain structure of individual grains within bulk polycrystalline electro-ceramic samples under electric field. A detailed explanation of the methods current and future development will be given in addition to examples from materials which undergo contrasting strain mechanisms including field-induced phase transformations, and ferroelectric/ferroelastic domain switching.

North Carolina State University