Dynamics of the Freezing Front During the Solidification of a Colloidal Alumina Aqueous Suspension: In Situ X‐Ray Radiography, Tomography, and Modeling

@article{Bareggi2011DynamicsOT,
  title={Dynamics of the Freezing Front During the Solidification of a Colloidal Alumina Aqueous Suspension: In Situ X‐Ray Radiography, Tomography, and Modeling},
  author={Andrea Bareggi and Eric Maire and Audrey Lasalle and Sylvain Deville},
  journal={Journal of the American Ceramic Society},
  year={2011},
  volume={94},
  pages={3570-3578}
}
Ice templating of colloidal suspension is gaining interest in material science because it offers the possibility to shape advanced materials, in particular porous ceramics. Recent investigations on this process show that a correlation between the morphology of the frozen suspension and the velocity of the freezing front do exist. The dynamics of the freezing front of a colloidal suspension of alumina is investigated in this study by experimental tests, finite element analysis, and analytical… Expand

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2
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References

SHOWING 1-10 OF 32 REFERENCES
In situ X-ray radiography and tomography observations of the solidification of aqueous alumina particle suspensions. Part I: Initial instants
This paper investigates by in situ high-resolution X-ray radiography and tomography the behavior of colloidal suspensions of alumina partic les during directional solidification by freezing. TheExpand
Structural properties of materials created through freeze casting
Upon freezing of an aqueous suspension of colloidal particles, ice platelets or dendrites with high aspect ratios are formed that engulf or reject the particles, depending on their size and theExpand
Solidification of colloidal suspensions
We present a mathematical model of the unidirectional solidification of a suspension of hard-sphere colloids. Similarity solutions are obtained for the volume fraction and temperature profiles aheadExpand
Freeze-Casting of Porous Ceramics: A Review of Current Achievements and Issues
Freeze-casting of porous ceramics have seen a great deal of efforts during the last few years. The objective of this review is to provide a first understanding of the process as of today. ThisExpand
Ice-templated porous alumina structures
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 by controllingExpand
Disorder-to-Order Transition in Settling Suspensions of Colloidal Silica: X-ray Measurements
TLDR
In experiments with organophilic silica in cyclohexane, gravity settling was used to concentrate the particles, and scanning electron microscopy of the crystalline sediment indicates hexagonally closepacked layers. Expand
In Situ Experiments with X ray Tomography: an Attractive Tool for Experimental Mechanics
This paper aims at illustrating the potential of X-ray tomography for studying the mechanical behaviour of materials through in situ experiments. Typical experimental tomography set ups which useExpand
GLASS TRANSITION IN THE HARD‐SPHERE MODEL AND KAUZMANN'S PARADOX *
The transformation from a metastable supercooled liquid to an amorphous solid is one of the more common and technologically interesting amongst experimental phase transitions, but its classical,Expand
Theory and modeling of phase change materials with and without mushy regions
Abstract The continuous-properties model has been developed to numerically solve problems of melting and solidification of substances with a mushy region. The new method is applicable to negligiblyExpand
Freeze gelation: a new option for the production of biological ceramic composites (biocers)
Abstract Freeze gelation was used for immobilization and conservation of living microorganisms in inorganic solids. The irreversible sol–gel transition of a mixture of colloidal silica, ceramicExpand
...
1
2
3
4
...