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Al2O3–SiC composites prepared by infiltration of pre-sintered alumina with a poly(allyl)carbosilane

Galusek, Dušan ; Klement, Róbert ; Sedláček, Jaroslav ; Balog, Miroslav ; Fasel, Claudia ; Zhang, J. ; Crimp, M. A. ; Riedel, Ralf :
Al2O3–SiC composites prepared by infiltration of pre-sintered alumina with a poly(allyl)carbosilane.
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2010.09.013]
In: Journal of the European Ceramic Society, 31 (1-2) pp. 111-119. ISSN 09552219
[Artikel], (2011)

Offizielle URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2010.09.013

Kurzbeschreibung (Abstract)

The Al2O3/SiC nanocomposites containing 3–8 vol.% SiC were prepared through infiltration and in situ thermal decomposition of a preceramic polymer SiC precursor (poly(allyl)carbosilane) in pre-sintered alumina matrix. The volume fraction of SiC, and the microstructure of composites were adjusted by concentration of the polymer solution, and by the conditions of pyrolysis and sintering. The specimens were densified by pressureless sintering at temperatures between 1550 and 1850 °C in flowing argon. The use of powder bed producing SiO, CO and other volatile species suppressed decomposition reactions in the composites and was vital for their successful densification. The experimental results are discussed against thermodynamic analysis of the system Al2O3/SiC/SiO2 in an inert Ar atmosphere.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Galusek, Dušan ; Klement, Róbert ; Sedláček, Jaroslav ; Balog, Miroslav ; Fasel, Claudia ; Zhang, J. ; Crimp, M. A. ; Riedel, Ralf
Titel: Al2O3–SiC composites prepared by infiltration of pre-sintered alumina with a poly(allyl)carbosilane
Sprache: Englisch
Kurzbeschreibung (Abstract):

The Al2O3/SiC nanocomposites containing 3–8 vol.% SiC were prepared through infiltration and in situ thermal decomposition of a preceramic polymer SiC precursor (poly(allyl)carbosilane) in pre-sintered alumina matrix. The volume fraction of SiC, and the microstructure of composites were adjusted by concentration of the polymer solution, and by the conditions of pyrolysis and sintering. The specimens were densified by pressureless sintering at temperatures between 1550 and 1850 °C in flowing argon. The use of powder bed producing SiO, CO and other volatile species suppressed decomposition reactions in the composites and was vital for their successful densification. The experimental results are discussed against thermodynamic analysis of the system Al2O3/SiC/SiO2 in an inert Ar atmosphere.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the European Ceramic Society
Band: 31
(Heft-)Nummer: 1-2
Freie Schlagworte: Nanocomposites, Al2O3, SiC, SiO2, Sintering
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Disperse Feststoffe, Dispersive Solids
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 04 Apr 2012 11:30
Offizielle URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2010.09.013
ID-Nummer: 10.1016/j.jeurceramsoc.2010.09.013
Sponsoren: The financial support of this work by the Alexander von Humboldt Foundation, Bonn, Germany (D. Galusek and R. Riedel), by the APVV grant No 0485-06, by the grant APVV LPP 0297-09, J. Fulbright Commission in the Slovak Republic (M. Balog)
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