Manufacturing of biomorphic (Si, Ti, Zr)-carbide ceramics by sol–gel processing

Autor:	J. Cao, Heino Sieber, O. Rusina, Carlos R. Rambo
Rok vydání:	2005
Předmět:	Condensation polymer Materials science Metallurgy chemistry.chemical_element General Chemistry Carbide Colloid Chemical engineering chemistry visual_art visual_art.visual_art_medium General Materials Science Ceramic Porosity Pyrolysis Carbon Sol-gel
Zdroj:	Carbon. 43:1174-1183
ISSN:	0008-6223
Popis:	Biomorphic (wood derived) carbide ceramics with an overall composition in the systems MeC/C (with Me = Si, Ti, Zr) were produced by vacuum infiltration of low viscosity organo-metallic colloidal suspensions into biologically derived carbon templates. After hydrolysis into Me(OH)4-gels, the Me(OH)4-gel/C-templates were submitted to a high temperature pyrolysis/reaction treatment at 1600 °C to promote (i) the polycondensation of the Me(OH)4-gels into the corresponding MeO2-phase and (ii) the carbothermal reaction of the MeO2 with the biocarbon template into highly porous, biomorphic SiC/C-, TiC/C- and ZrC/C-ceramics. The influence of the initial porosity of the biocarbon template on the final phase composition and morphology of the formed biomorphic MeC/C-ceramic composites is analysed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c6c02d11aa77ca17e8a861901e51988b https://doi.org/10.1016/j.carbon.2004.12.009 Zobrazit plný text záznamu Full Text from ScienceDirect