Abstract
This study proposes an innovative way of creating porous ceramics with a unique gradient porous structure using three-dimensional extrusion of a multilayered ceramic/camphene feed rod, denoted as "3D-Exm". This 3D-Exm technique utilizes the wall slip phenomenon during the extrusion process, which can create a gradient core/shell structure with a gradual change in the core/shell thickness ratio. In addition, the microstructure of ceramic filaments can be tuned through the use of the camphene as a pore-forming agent. Porous alumina ceramics produced using a bilayered feed rod comprised of the alumina/camphene mixtures with the relatively high (φH = 40 vol%) and low ceramic contents (φL = 10 vol%) showed a gradual change in porosity in the intermediate region between the relatively dense (porosity = ~3 vol%) and highly porous regions (porosity = ∼85 vol%).
Original language | English |
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Pages (from-to) | 395-398 |
Number of pages | 4 |
Journal | Journal of the American Ceramic Society |
Volume | 99 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2016 Feb 1 |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry