Synthesis and characterization of boron silicon oxycarbide glass fibers

Autor:	R. Peña-Alonso, José Luis Oteo, Aitana Tamayo, Fausto Rubio, J. A. Rubio
Rok vydání:	2012
Předmět:	Materials science Glass fiber chemistry.chemical_element Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Graphite Fiber Composite material Hybrid material Boron Pyrolysis Sol-gel
Zdroj:	Journal of Non-Crystalline Solids. 358:155-162
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2011.09.002
Popis:	Boron silicon oxycarbide fiber mats have been obtained through pyrolysis in inert atmosphere of sol–gel derived hybrid materials. The characterization of the preceramic hybrid fibers and the pyrolysis process reveals different boron incorporation depending on the composition. The ceramic conversion involves a series of reactions governed by the presence of the mixed bonds that implies larger phase segregation and higher graphite nanodomain size with the decrease of the number of borosiloxane bridges in the preceramic material. The formation of a mixed structure, where both Si and B are taking part on the ceramic network occurs with the excess of B that precipitates as boric acid in the surface of the fibers. These precipitates can cause pores in the surface of the pyrolyzed fiber.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c5fe99eb1329081e0d2fc3dacd323177 https://doi.org/10.1016/j.jnoncrysol.2011.09.002 Zobrazit plný text záznamu Full Text from ScienceDirect