Gradient-controlled freeze casting of preceramic polymers
- Creators
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Arai, Noriaki
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Faber, Katherine T.
Abstract
Solidification is the foundation upon which freeze casting is built, and this work seeks to understand the solidification process in freeze casting, especially with respect to the growth of dendrites. To this end, two solidification parameters, freezing front velocity and temperature gradient, were independently controlled using a gradient-controlled freeze casting setup to investigate the effects of each parameter. Changes in dendritic pore size and morphology with solidification parameters were investigated by scanning electron microscopy and mercury intrusion porosimetry. The results agree with dendrite growth theory. The theory of constitutional supercooling is used to describe the morphological changes of dendritic pores to cellular pores by the control of freezing front velocity, temperature gradient, and preceramic polymer concentrations.
Additional Information
© 2022 Elsevier Ltd. These studies were supported by the U.S. National Science Foundation under CBET-1911972 and the Rothenberg Innovation Initiative (RI2) program at Caltech. SEM work was performed in the Division of Geology and Planetary Science Analytical Facility at Caltech. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional details
- Eprint ID
- 122370
- Resolver ID
- CaltechAUTHORS:20230725-500424000.4
- CBET-1911972
- NSF
- Rothenberg Innovation Initiative (RI2)
- Created
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2023-08-11Created from EPrint's datestamp field
- Updated
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2023-08-14Created from EPrint's last_modified field