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Title: Development of Si-O-C based ceramic matrix composites produced via pyrolysis of a polysiloxane
Authors: Akkaş, Hatice Deniz
Öveçoğlu, M. L.
Tanoğlu, Metin
Keywords: Active filler controlled pyrolysis
Ceramic matrix composites
Pyrolytic conversion
Thermal transformations
Issue Date: 2004
Publisher: Trans Tech Publications
Source: Akkaş, H. D., Öveçoğlu, M. L., and Tanoğlu, M. (2004). Development of Si-O-C based ceramic matrix composites produced via pyrolysis of a polysiloxane. Key Engineering Materials, 264-268(II), 961-964. doi:10.4028/
Abstract: Pyrolytic conversion of a preceramic polymer, poly(phenyl)siloxane has been investigated to develop ceramic matrix composites (CMCs) at low temperatures with high dimensional stability. Furthermore, the thermal transformation of the polymer precursor under inert atmosphere was monitored. For this purpose, poly(phenyl)siloxanes were cured at about 200°C for 2 hours under air and pyrolysed at various temperatures in the range of 900 - 1500°C for 1 hour under inert argon atmosphere. The products of the pyrolytic conversion were analyzed using X-ray diffraction (XRD), thermal analysis (TG and DTA) and scanning electron microscopy (SEM) coupled with EDX analyzer. It was found that pyrolysis under inert atmosphere up to 1300°C led to amorphous silicon oxycarbide (SiOxCy) ceramics. Conversions at higher temperatures caused the transformation into the crystalline β-SiC phases. Moreover, to obtain composite monoliths inert Al2O3 and active Ti and Si particulates were incorporated into the polymer as fillers employing compressive moulding at moderate temperatures. During pyrolysis, cross-linked green compacts of the particulate/polymer system were converted into ceramic body and the microstructural parameters and the effects of the filler type on the microstructure were investigated.
Description: Proceedings of the 8th Conference and Exhibition of the European Ceramic Society; Istanbul; Turkey; 29 June 2003 through 3 July 2003
ISSN: 1013-9826
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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