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Microstructure maps for unidirectional freezing of particle suspensions

: Oberacker, Rainer; Waschkies, Thomas; Hoffmann, Michael

Ohji, T.:
Advanced processing and manufacturing technologies for structural and multifunctinal materials V : January 23 - 28, 2011, Daytona Beach, Florida
Hoboken, NJ: Wiley, 2011 (Ceramic engineering and science proceedings 32,8)
ISBN: 978-1-11-805993-7
ISBN: 978-1-118-09537-9
ISBN: 978-1-118-17270-4
International Conference on Advanced Ceramics and Composites (ICACC) <35, 2011, Daytona Beach/Fla.>
Fraunhofer IZFP ()

The structure formation in water based ceramic suspensions during unidirectional freezing was experimentally investigated over a wide range of solidification velocities. Supplementary experiments with polystyrene suspensions were carried out to extend the range of particle sizes. Depending on particle size, solids loading and solidification velocity, planar, lamellar or isotropic growth of the ice crystals leads to different types of microstructure. The results are summarized in a microstructure map as a first estimate for the role of the process parameters in microstructure formation.