Freeze-casting
Sign in to savethumb|upright=2.0|Freeze-cast alumina that has been partially sintered. The freezing direction in the image is up.
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~33 min read
Article
19 sectionsContents
- Overview
- Initial zone: nucleation and growth mechanisms
- Transition zone: a changing microstructure
- Steady-state growth zone
- Controlling the porous structure
- Controlling pore size
- Controlling pore shape
- Static vs. dynamic freezing profiles
- Anisotropy of the interface kinetics
- Particle packing effects
- Morphological instabilities
- Mechanical properties
- Novel freeze-casting techniques
- Freeze cast materials
- Applications of freeze cast materials
- See also
- Further reading
- External links
- References
thumb|upright=2.0|Freeze-cast alumina that has been partially sintered. The freezing direction in the image is up.
Freeze-casting, also frequently referred to as ice-templating, is a technique that exploits the highly anisotropic solidification behavior of a solvent (often, but not exclusively, water) in a well-dispersed solution or slurry to controllably template directionally porous ceramics, polymers, metals and their hybrids. By subjecting an aqueous suspension or slurry to a directional temperature gradient, ice crystals will nucleate on one side and grow along the temperature gradient. The ice crystals will redistribute the dissolved substance and the suspended particles as they grow within the solution or slurry, effectively templating the ingredients that are distributed in the suspension or slurry.