US EPA

6015828 

Journal Article 

Paper derived biomorphic porous titanium carbide and titanium oxide ceramics produced by chemical vapor infiltration and reaction (CVI-R) 

Popovska, N; Streitwieser, DA; Xu, C; Gerhard, H 

2005 

Yes 

Journal of the European Ceramic Society
ISSN: 0955-2219 

25 

6 

829-836 

10.1016/j.jeurceramsoc.2004.04.007 

WOS:000227822400007 

http://www.sciencedirect.com/science/article/pii/S0955221904002031
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Chemical vapor infiltration (CVI) is used for producing biomorphic porous TiC ceramics derived from paper. The paper samples are first carbonized in inert atmosphere to yield biocarbon template structures (Cb-template). Subsequently, three routes for converting the Cb-templates into TiC ceramics are studied. The first route includes CVI with TiCl4-H2. The effect of methane as additional carbon source is investigated on the second route (TiCl4-H2-CH4). Finally, a two step CVI process (Route 3), first TiCl4-H2 and subsequent TiCl4-H2-CH4, is performed in order to improve both the grade of conversion of the Cb-template into TiC and the mechanical properties of the resulting porous TiC ceramics. Furthermore, porous TiO2 ceramics are produced by high temperature oxidation of the TiC ceramics in air flow. 

porous ceramics; biomorphic ceramics; TiC; chemical vapor infiltration