Distribution of Grain Boundaries in SrTiO3as a Function of Five Macroscopic Parameters

Autor:	Bassem El Dasher, Tomoko Sano, Gregory S. Rohrer, David M. Saylor
Rok vydání:	2004
Předmět:	education.field_of_study Materials science Misorientation Population Boundary (topology) Mineralogy Geometry Surface energy Orientation (vector space) Materials Chemistry Ceramics and Composites Grain boundary Anisotropy education Crystal twinning
Zdroj:	Journal of the American Ceramic Society. 87:670-676
ISSN:	1551-2916 0002-7820
Popis:	Measurements of the grain boundary population as a function of misorientation and boundary plane orientation show that the distribution is inversely correlated to the sum of the energies of the surfaces comprising each boundary. The observed correlation suggests that the difference between the energy of a high-angle grain boundary and the two component surfaces is relatively constant as a function of misorientation. Two exceptions to this correlation were identified: low-misorientation-angle boundaries and the coherent twin boundary, where the (111) planes in the adjoining crystals are parallel to each other, but rotated by 60° around the [111] axis. In these cases, the high degree of coincidence across this interface probably lowers the boundary energy with respect to that of the component surfaces. For all other boundaries, the anisotropy of the population is accurately predicted by the surface energy anisotropy, and in general, boundaries display a preference for {100} orientations, the planes of minimum surface energy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b9e8b9b6313dfedd337904e2ba5d0b5 https://doi.org/10.1111/j.1551-2916.2004.00670.x Zobrazit plný text záznamu Plný text ve formátu PDF