Back to Search
Start Over
Preparation of SiC-based cellular substrate by pressure-pulsed chemical vapor infiltration into honeycomb-shaped paper preforms.
- Source :
- Journal of Materials Science; Jun2002, Vol. 37 Issue 12, p2413-2419, 7p
- Publication Year :
- 2002
-
Abstract
- Using a pressure-pulsed chemical vapor infiltration technique, SiC was infiltrated from a SiCl<subscript>4</subscript> (4%)–CH<subscript>4</subscript> (4%)–H<subscript>2</subscript> gas phase into carbonized paper preforms at 1100°C. SiC-based cellular substrates with cell wall thicknesses of 25, 50 and 100 μm were obtained by using honeycomb-shaped paper preforms as the templates. The reduction of both wall thickness t and cell pitch d of SiC-based honeycomb substrate successfully led to an increase in geometric surface area per unit volume S, keeping pressure drop Δ P at constant, besides; Δ P decreased without lowering S by the reduction of t and the increase in d. The pressure drop in the prepared honeycomb substrates depended on S<superscript>2</superscript>α<superscript>−3</superscript> value, where α was open frontal area fraction. The compressive strength of the honeycomb substrates with t of 25 μm was about 7 MPa. The strength increased in proportion with 1 − α, which corresponded to the volume fraction of the cell wall in the honeycomb substrate. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 37
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 52539009
- Full Text :
- https://doi.org/10.1023/A:1015410816924