Erschienen in:Journal of the American Ceramic Society
Sprache:
Englisch
DOI:
10.1111/j.1151-2916.2003.tb03345.x
ISSN:
0002-7820;
1551-2916
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Symmetrical tilt grain boundaries (STGBs) on the (10¯10), (¯2112), and (01¯18) planes in α‐Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> have been investigated for their behavior with respect to yttrium doping by performing a combined study of high‐resolution transmission electron microscopy and spatially resolved energy dispersive X‐ray analysis. Bicrystals have been produced by diffusion bonding under ultrahigh vacuum; yttrium was introduced before the bonding process. The prismatic twin has a bulklike grain boundary (GB) structure and does not accommodate any yttrium at the GB. The yttrium at the Σ17 (¯2112) GB and the Σ37 (01¯18) GB changes the GB structure and the content of other impurities.</jats:p>