Slip casting of advanced ceramics and composites

Conference · Sun Mar 01 04:00:00 EST 1987

OSTI ID:5620262

Schilling, C H; Aksay, I A

Particle packing arrangements in slip cast (colloidal filtration) articles uniquely affect the evolution of grain size and porosity defect distributions during sintering. These particle packing arrangements are influenced by the physical properties of colloidal structures in suspension and the resulting processes of agglomerate restructuring and pore closure during consolidation. Key parameters affecting cast layer packing structures are the particle size distribution, interparticle potential, hydrodynamic stresses in suspensions, and the combined effect of hydrodynamic and compaction stresses in cast layers. Experiments with electrostatically stabilized aqueous alumina systems illustrate specific effects of interparticle potential on slip casting rates and microstructure evolution during sintering. In addition, experiments were conducted that illustrate microstructure variations caused by differential sedimentation velocities and agglomerate growth kinetic effects.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA); Washington Univ., Seattle (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5620262
• Report Number(s): PNL-SA-14696; CONF-8702120-1; ON: DE88003424
• 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
CASTING
CERAMICS
CHALCOGENIDES
COLLOIDS
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
DEFECTS
DISPERSIONS
DISTRIBUTION
FABRICATION
GRAIN SIZE
KINETICS
MATERIALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POROSITY
SEGREGATION
SHEAR
SINTERING
SIZE
SLIP CASTING
SUSPENSIONS