Strength and flaw elimination assessment in tape cast ceramic laminates

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

OSTI ID:7201732

Ham-su, R; Wilkinson, D S

Monolithic Al2O3 ceramic laminates were fabricated via tape-casting process. The strength of single tapes were compared with laminates using biaxial flexure tests. The average fracture stress was unchanged. However, the laminates presented a multimodal strength distribution. The feasibility of eliminating or diminishing void-type flaws present in the green tapes was assessed. To this end, tapes were first punctured, then laminated and sintered and the effect of these known flaws in the final ceramic was assessed by four-point bending tests. The thermocompression of green tapes during laminate fabrication was found to drastically reduce the severity of flaws. 6 refs.

• OSTI ID: 7201732
• Report Number(s): CONF-920144-; CODEN: CESPD
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Vol. 13:9-10; Conference: 16. annual conference on composites, materials, and structures, Cocoa Beach, FL (United States), 13-16 Jan 1992; ISSN 0196-6219
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CASTING
DEFECTS
FRACTURE PROPERTIES
HOT PRESSING
COMPOSITE MATERIALS
BENDING
CERAMICS
COMPARATIVE EVALUATIONS
FLEXURAL STRENGTH
FRACTURE MECHANICS
LAYERS
MECHANICAL PROPERTIES
MITIGATION
SINTERING
VOIDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DEFORMATION
EVALUATION
FABRICATION
MATERIALS
MATERIALS WORKING
MECHANICS
OXIDES
OXYGEN COMPOUNDS
PRESSING
360601* - Other Materials- Preparation & Manufacture
360602 - Other Materials- Structure & Phase Studies
360603 - Materials- Properties