Effect of Surface Forces on the Rheology of Particle-Liquid Systems and the Consolidation of Ceramic Powders
Abstract
More reliable ceramics require improved processing reliability. Heterogeneities bought with powders and those inadvertently introduced during processing as well as non-uniform and undefined phase distributions contribute to unreliable processing. Colloidal powder treatments can eliminate many heterogeneities and ensure more uniform phase distributions. To ensure that new heterogeneities are not introduced, colloidally treated powders must be piped, as slurries, directly to a die cavity. Slurry consolidation methods based on particle partitioning, e.g., pressure filtration and centrifugation are emphasized in this review. Interparticle potentials play a dominant role in governing the slurry viscosity, maximum particle packing density and the rheology of the consolidated body. These roles will be reviewed with the objective to understand how damage free bodies can be consolidated from slurries to increase the structural rollability of ceramics and their composites.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1992
- Accession Number
- ADA254183
Entities
People
- Dale S. Pearson
- Fred F. Lange
Organizations
- University of California, Santa Barbara