Gamma-ray attenuation analysis of packing structure evolution during powder consolidation. [Alumina]

Conference · Mon Feb 01 04:00:00 EST 1988

OSTI ID:6568794

Schilling, C H; Aksay, I A

Gamma-ray attenuation measurements enable nondestructive analysis of powder packing density heterogeneities which develop during consolidation of ceramic compacts. In situ measurements of gamma-ray attenuation were performed during sedimentation of aqueous alumina suspensions to evaluate the role of suspension pH on particle rearrangement processes in cast layers. These data are used to support consolidation kinetic models describing processes of agglomerate restructuring and cast layer compaction. Porosity defects in sintered casts are correlated with pH-dependent processes of pore closure detected during sedimentation. 23 refs., 3 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6568794
• Report Number(s): PNL-SA-15087; CONF-8711115-6; ON: DE88007840
• 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
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ATTENUATION
CERAMICS
CHALCOGENIDES
CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
DENSITOMETERS
DENSITY
ELECTROMAGNETIC RADIATION
FABRICATION
GAMMA RADIATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
METALLURGY
MICROSTRUCTURE
NONDESTRUCTIVE ANALYSIS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOTOMETERS
PHYSICAL PROPERTIES
POROSITY
POWDER METALLURGY
POWDERS
RADIATIONS
SEDIMENTS
SINTERING