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Structure and Chemistry of Symmetrical Tilt Grain Boundaries in α‐Al 2 O 3 : II, Bicrystals with Y at the Interface
Author(s) -
Gemming Thomas,
Nufer Stefan,
Kurtz Wolfgang,
Rühle Manfred
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03345.x
Subject(s) - yttrium , grain boundary , materials science , transmission electron microscopy , impurity , crystallography , diffusion bonding , tilt (camera) , diffusion , mineralogy , microstructure , metallurgy , chemistry , geometry , nanotechnology , thermodynamics , oxide , physics , mathematics , organic chemistry
Symmetrical tilt grain boundaries (STGBs) on the (10¯10), (¯2112), and (01¯18) planes in α‐Al 2 O 3 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.