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논문 기본 정보

저자정보
(서울시립대학교) (서울시립대학교)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.11 No.5
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    초록·키워드

    A simple processing route for manufacturing highly porous, silica-bonded SiC ceramics with spherical pores has been developed. The strategy adopted for making porous silica-bonded SiC ceramics entails the following steps: (i) fabricating a formed body through a combination of SiC and polymer microbeads (employed as sacrificial templates) and (ii) sintering the formed body in air. SiC particles are bonded to each other by oxidation-derived SiO2 glass. By controlling the microbead content and the sintering temperature, it was possible to adjust the porosity such that it ranged from 19 to 77 %. The flexural and compressive strengths of the porous silica-bonded SiC ceramics with ∼40 % porosity were ∼65 MPa and ∼200 MPa, respectively. The superior strengths were attributed to the homogeneous distribution of small (≤ 30 μm), spherical pores with dense struts in the porous silica-bonded SiC ceramics.

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