HREM analysis of structure and defects in a ?5 (210) grain boundary in rutile

Autor:	J. B. Vandersande, U. Dahmen, I. G. Solorzano, S. Paciornik
Rok vydání:	1994
Předmět:	Materials science Condensed matter physics Misorientation Condensed Matter Physics Rigid body Electronic Optical and Magnetic Materials Ion Crystallography Local symmetry Rutile Lattice (order) General Materials Science Grain boundary Volume contraction
Zdroj:	Interface Science. 2:125-136
ISSN:	1573-2746 0927-7056
DOI:	10.1007/bf01184507
Popis:	The structure of a Σ5 (210) boundary in rutile was investigated by high resolution electron microscopy (HREM). The boundary was stepped with an average inclination of about 5° from the symmetrical (210) plane. The steps were associated with 1/5[210] DSC lattice dislocations accommodating a deviation of about 2° from the exact Σ5 misorientation of 53.1°, and resulting in a misorientation of 51°. The boundary topography, the location of structural units and the local symmetry were determined using pattern recognition techniques. Flat terraces between steps had a periodic Σ5 (210) structure which exhibited mirror glide symmetry. Image simulations showed best agreement with experimental images for a model structure with a rigid body shift of 0.21 nm parallel, and a 0.10 nm volume contraction normal to the interface. This structure requires a high density of defects or an excess of Ti ions, presumably of lower oxidation state.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ca439611c3bbeed8a09437380c1bd1ef https://doi.org/10.1007/bf01184507 Zobrazit plný text záznamu Full text from SpringerLink