Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 31, Issue 1-2, Pages 111-119Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2010.09.013
Keywords
Nanocomposites; Al2O3; SiC; SiO2; Sintering
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Funding
- European Fund of Regional Development
- Alexander von Humboldt Foundation, Bonn, Germany
- US National Science Foundation
- APVV [0485-06, LPP 0297-09]
- J Fulbright Commission in the Slovak Republic
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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 degrees 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 (C) 2010 Elsevier Ltd All rights reserved
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