Exaggerated grain growth in ZrO/sub 2/-toughened Al/sub 2/O/sub 3/

Journal Article · Sat Mar 01 04:00:00 EST 1986 · J. Am. Ceram. Soc.; (United States)

OSTI ID:5850888

Kibbel, B; Heuer, A H

Annealing of ZrO/sub 2/-toughened Al/sub 2/O/sub 3/ (ZTA) at elevated temperatures causes growth of both the intergranular ZrO/sub 2/ particles and the Al/sub 2/O/sub 3/ ''matrix'' grains. Exaggerated (''breakaway'') grain growth occurs in some, but not all, specimens. Analytical electron microscopy of two ZTA's, both of which contained a continuous amorphous (glassy) grain-boundary phase, but only one of which showed breakaway grain growth, revealed that the occurrence of breakaway grain growth could be correlated with the chemistry of the ubiquitous glassy grain-boundary phase.

• Research Organization: Dept. of Metallurgy and Materials Science, Case Western Reserve Univ., Cleveland, OH 44106
• DOE Contract Number: AC02-83ER45006
• OSTI ID: 5850888
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 69:3; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMORPHOUS STATE
ANNEALING
CERAMICS
CHALCOGENIDES
CRYSTAL GROWTH
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
GRAIN GROWTH
HEAT TREATMENTS
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PARTICLES
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES