Properties of porous SiC ceramics prepared by wood template method

Title
Properties of porous SiC ceramics prepared by wood template method
Authors
하정수Byong Gu LimGeum-Hyun DohIn-Aeh Kang김창삼
Keywords
porous SiC; wood template; embedding; microstructure; Properties
Issue Date
2010-07
Publisher
한국세라믹학회지; Journal of the Korean Ceramic Society
Citation
VOL 47, NO 4, 308-311
Abstract
Porous SiC samples were prepared with three types of wood (poplar, pine, big cone pine) by simply embedding the wood charcoal in a powder mixture of Si and SiO2 at 1600 and 1700oC. The basic engineering properties such as density, porosity, pore size and distribution, and strength were characterized. The samples showed full conversion to mostly β-SiC with good retention of the cellular structure of the original wood. More rigid SiC struts were developed for 1700oC. They showed similar bulk density (0.5~ 0.6 g/cm3) and porosity (81~84%) irrespective of the type of wood. The poplar sample showed three pore sizes (1, 8, 60 μm) with a main size of 60 μm. The pine sample showed a single pore size (20 μm). The big cone pine sample showed two pore sizes (10, 80 μm) with a main size of 10 μm. The bend strength was 2.5 MPa for poplar, 5.7 MPa for pine, 2.8 MPa for big cone pine, indicating higher strength with pine.
URI
http://pubs.kist.re.kr/handle/201004/37839
ISSN
1229-7801
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KIST Publication > Article
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