Strength and flaw elimination assessment in tape cast ceramic laminates

Conference · Thu Oct 01 04:00:00 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--
• 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
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BENDING
CASTING
CERAMICS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
DEFECTS
DEFORMATION
EVALUATION
FABRICATION
FLEXURAL STRENGTH
FRACTURE MECHANICS
FRACTURE PROPERTIES
HOT PRESSING
LAYERS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MECHANICS
MITIGATION
OXIDES
OXYGEN COMPOUNDS
PRESSING
SINTERING
VOIDS