Tape cast Al2O3/ZrO2 composite laminates

Conference · Thu Oct 01 04:00:00 EDT 1992 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:7201770

Plucknett, K P; Caceres, H; Fremont, F; Wilkinson, D S

Fine Al2O3 and ZrO2 powders have been used to fabricate flexible ceramic sheets via the tape-casting process. The sheets are then formed into simple laminate shapes by stacking and thermocompression, after which the laminates are subjected to a controlled binder removal cycle. Hot-pressing (sinter-forging) of laminates results in the retention of very fine grain sizes, close to that of the original powder, with densities in excess of 98 percent of theoretical. Pressureless-sintering did not result in complete densification due to the formation of higher density regions at tape interfaces leading to constrained sintering in two dimensions. Pressureless-sintered composite laminates were superplastically deformed to about 100 percent strain using a biaxial flexure test at temperatures of the order of 1450 C, without significant grain growth. 11 refs.

• OSTI ID: 7201770
• Report Number(s): CONF-920144--
• Conference Information: Journal Name: Ceramic Engineering and Science Proceedings; (United States) Journal Volume: 13:9-10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CASTING
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
DEFORMATION
DENSITY
FABRICATION
GRAIN SIZE
HOT PRESSING
INTERFACES
LAYERS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLASTICITY
POWDER METALLURGY
PRESSING
SHEETS
SIZE
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES