Processing and mechanical properties of porous silica-bonded silicon carbide ceramics

被引:70
作者
Chun, YS [1 ]
Kim, YW [1 ]
机构
[1] Univ Seoul, Dept Mat Sci & Engn, Seoul 130743, South Korea
关键词
porous materials; silicon carbide; processing; strength;
D O I
10.1007/BF03027504
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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 similar to 40% porosity were similar to 65 MPa and similar to 200 MPa, respectively. The superior strengths were attributed to the homogeneous distribution of small (<= 30 mu m), spherical pores with dense struts in the porous silica-bonded SiC ceramics.
引用
收藏
页码:351 / 355
页数:5
相关论文
共 19 条
[1]   STRUCTURAL STUDIES OF ACTIVE-CARBON USED IN THE GROWTH OF SILICON-CARBIDE CATALYST SUPPORT [J].
BENAISSA, M ;
WERCKMANN, J ;
EHRET, G ;
PESCHIERA, E ;
GUILLE, J ;
LEDOUX, MJ .
JOURNAL OF MATERIALS SCIENCE, 1994, 29 (18) :4700-4707
[2]   PROCESSING OF MICROCELLULAR SIC FOAMS .2. CERAMIC FOAM PRODUCTION [J].
FITZGERALD, TJ ;
MICHAUD, VJ ;
MORTENSEN, A .
JOURNAL OF MATERIALS SCIENCE, 1995, 30 (04) :1037-1045
[3]   PROCESSING OF MICROCELLULAR SIC FOAMS .1. CURING KINETICS OF POLYCARBOSILANE IN AIR [J].
FITZGERALD, TJ ;
MORTENSEN, A .
JOURNAL OF MATERIALS SCIENCE, 1995, 30 (04) :1025-1032
[4]  
Ito S, 1998, POWDER TECHNOL, V100, P32
[5]   Influence of the preparation conditions on the synthesis of high surface area SiC for use as a heterogeneous catalyst support [J].
Keller, N ;
Pham-Huu, C ;
Roy, S ;
Ledoux, MJ ;
Estournes, C ;
Guille, J .
JOURNAL OF MATERIALS SCIENCE, 1999, 34 (13) :3189-3202
[6]  
Kim S. H., 2004, J KOR CERAM SOC, V41, P541
[7]   Fabrication of heat-resistant silicon carbide ceramics by controlling intergranular phase [J].
Kim, YW ;
Lee, SH ;
Nishimura, T ;
Mitomo, M ;
Lee, JH ;
Kim, DY .
ADVANCED SI-BASED CERAMICS AND COMPOSITES, 2005, 287 :299-310
[8]   Fabrication of open-cell, microcellular silicon carbide ceramics by carbothermal reduction [J].
Kim, YW ;
Kim, SH ;
Song, IH ;
Kim, HD ;
Park, CB .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2005, 88 (10) :2949-2951
[9]   Processing of microcellular preceramics using carbon dioxide [J].
Kim, YW ;
Park, CB .
COMPOSITES SCIENCE AND TECHNOLOGY, 2003, 63 (16) :2371-2377
[10]   Fabrication of microcellular ceramics using gaseous carbon dioxide [J].
Kim, YW ;
Kim, SH ;
Wang, CM ;
Park, CB .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (12) :2231-2233