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Novel Three-Dimensional Extrusion of Multilayered Ceramic/Camphene Mixture for Gradient Porous Ceramics

Authors
Choi, Ik-JunMoon, Young-WookKoh, Young-HagKim, Hyoun-Ee
Issue Date
2월-2016
Publisher
WILEY
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.99, no.2, pp.395 - 398
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume
99
Number
2
Start Page
395
End Page
398
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/89657
DOI
10.1111/jace.14033
ISSN
0002-7820
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-Ex(m)". This 3D-Ex(m) 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 (phi(H) = 40 vol%) and low ceramic contents (phi(L) = 10 vol%) showed a gradual change in porosity in the intermediate region between the relatively dense (porosity = similar to 3 vol%) and highly porous regions (porosity = similar to 85 vol%).
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