Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7886028 | Ceramics International | 2018 | 5 Pages |
Abstract
SiC porous ceramics can be prepared by introducing the polyurethane preparation method into the production process of ceramic biscuits, followed by sintering at 1300â¯Â°C for 2â¯h under N2 flux after the cross-linking of polycarbosilane at 220â¯Â°C for 4â¯h in air. The microstructures, mechanical properties and infiltrations of the SiC porous ceramics are investigated in detail. The best dispersal effect comes from the SiC slurry with xylene as the solvent and a mixture of Silok®7096 (1â¯wt%) and Anjeka®6041 (4â¯wt%) as the dispersant. The compressive strength of SiC porous ceramics with high porosity (69.53%) reaches 16.9â¯MPa. The heat treatment can increase infiltration, the rate of which (4.296â¯Ãâ¯10â7 mm2) after the heat treatment at 750â¯Â°C in air is approximately two times faster than that before the heat treatment. The SiC porous ceramics fabricated in this study will have potential application in active thermal protection systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Bo Zhang, Haiming Huang, Xueling Lu, Xiaoliang Xu, Jun Yao,