Porosity control of porous silicon carbide ceramics

被引：105

作者：

Chae, Su-Ho ^{[1
]}

Kim, Young-Wook ^{[1
]}

Song, In-Hyuck ^{[2
]}

Kim, Hai-Doo ^{[2
]}

Narisawa, Masaki ^{[3
]}

机构：

[1] Univ Seoul, Dept Mat Sci & Engn, Seoul 130743, South Korea

[2] Korea Inst Mat Sci, Engn Ceram Grp, Chang Won 641831, Gyeongnam, South Korea

[3] Osaka Prefecture Univ, Grad Sch Engn, Dept Mat Sci, Naka Ku, Osaka 5998531, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 13期

关键词：

SiC; Porosity; Strength; Porosity control; Polysiloxane; MICROSTRUCTURAL CHARACTERIZATION; CARBOTHERMAL REDUCTION; MECHANICAL-PROPERTIES; SIC CERAMICS; WOOD; INFILTRATION; FABRICATION; BEHAVIOR; CELL; CONVERSION;

D O I：

10.1016/j.jeurceramsoc.2009.03.027

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous SiC ceramics were fabricated by the carbothermal reduction of polysiloxane-derived SiOC containing polymer microbeads followed by sintering. The effect of the SiC powder: polysiloxane-derived SiC (SiC:PDSiC) ratio on the porosity and flexural strength of the porous SiC ceramics were investigated. The porosity generally increased with decreasing SiC:PDSiC ratio when sintered at the same temperature. It was possible to control the porosity of porous SiC ceramics within a range of 32-64% by adjusting the sintering temperature and SiC:PDSiC ratio while keeping the sacrificial template content to 50 vol%. The flexural strengths generally decreased with increasing porosity at the same SiC:PDSiC ratio. However, a SiC:PDSiC ratio of 9:1 and a sintering temperature of 1750 degrees C resulted in excellent strength of 57 MPa at 50% porosity. Judicious selection of the sintering temperature and SiC:PDSiC ratio is an efficient way of controlling the porosity and strength of porous SiC ceramics. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2867 / 2872

页数：6

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