Artificial Bone and Teeth through Controlled Ice Growth in Colloidal Suspensions
- Materials Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720 (United States)
- Laboratory of Synthesis and Functionalisation of Ceramics, FRE2770/Saint-Gobain CREE, 550 Ave. Alphonse Jauffret, 84306 Cavaillon Cedex (France)
The formation of regular patterns is a common feature of many solidification processes involving cast materials. We describe here how regular patterns can be obtained in porous alumina and hydroxyapatite (HAP) by controlling the freezing of ceramic slurries followed by subsequent ice sublimation and sintering, leading to multilayered porous ceramic structures with homogeneous and well-defined architecture. These porous materials can be infiltrated with a second phase of choice to yield biomimetic nacre-like composites with improved mechanical properties, which could be used for artificial bone and teeth applications. Proper control of the solidification patterns provides powerful means of control over the final functional properties. We discuss the relationships between the experimental results, ice growth fundamentals, the physics of ice and the interaction between inert particles and the solidification front during directional freezing.
- OSTI ID:
- 21064144
- Journal Information:
- AIP Conference Proceedings, Vol. 916, Issue 1; Conference: 13. international summer school on crystal growth, Park City, UT (United States), 5-11 Aug 2007; Other Information: DOI: 10.1063/1.2751933; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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