|About this Abstract
||Materials Science & Technology 2016
||Innovative Processing and Synthesis of Ceramics, Glasses and Composites
||Ceramics with Unique Pore Structures via Freeze Casting of Preceramic Polymers
||Maninpat Naviroj, Paolo Colombo, Katherine Faber
|On-Site Speaker (Planned)
To optimize the functionality of porous ceramic components, the ability to create ceramics with controlled and unique pore structures is desired. Freeze casting is a sacrificial templating technique where pores are generated from a crystal growth process, enabling a wide variety of pore structures. While freeze casting of ceramic suspensions has widely been studied, the use of preceramic polymers as an alternative precursor in freeze casting has been lightly explored. In this work, silicon-based polymer derived ceramics with various pore structures are obtained from freeze casting with solvents such as dimethyl carbonate, cyclohexane, cyclooctane, and t-butanol. We show how differences in the solidification process between each solvent result in different pore structures. Additionally, the differences in pore structures also lead to differences in permeability and compressive strength. In particular, lamellar structures are shown to have significantly lower strength but higher permeability when compared to dendritic pore structures.
||Planned: Publication outside of MS&T