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

Journal Article · Sat Mar 01 00:00:00 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), Vol. 69:3
• Country of Publication: United States
• Language: English

Related Subjects

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