Influence of pyrolysis temperature on fracture response in SiOC based composites reinforced by basalt woven fabric

0433976 - ÚFM 2015 RIV GB eng J - Journal Article
Chlup, Zdeněk - Černý, Martin - Strachota, Adam - Sucharda, Zbyněk - Halasová, Martina - Dlouhý, Ivo
Influence of pyrolysis temperature on fracture response in SiOC based composites reinforced by basalt woven fabric.
Journal of the European Ceramic Society. Roč. 34, č. 14 (2014), s. 3389-3398. ISSN 0955-2219. E-ISSN 1873-619X
R&D Projects: GA ČR GAP107/12/2445; GA MŠMT(CZ) ED1.1.00/02.0068
Institutional support: RVO:68081723 ; RVO:67985891 ; RVO:61389013
Keywords : Fracture behaviour * CMCs * Pyrolysis * Basalt fibre * Polysiloxane
Subject RIV: JL - Materials Fatigue, Friction Mechanics; JI - Composite Materials (USMH-B); JH - Ceramics, Fire-Resistant Materials and Glass (UMCH-V)
Impact factor: 2.947, year: 2014

The fracture resistance of ceramic based composites reinforced by various ceramic fibres can be dramatically enhanced when an efficient fracture mechanism takes place during the crack propagation. Presented work shows an effect of the pyrolysis temperature of the composite matrix on the fracture behaviour of the composite. The matrix is formed from the polysiloxane resin precursor and the reinforcement is a basalt woven fabric. The temperature range under investigation was from 600°C, where the onset of fracture properties were observed up to 800°C. Above this temperature basalt fibres suffer by rapid degradation of the microstructure. The optimum stage of the polysiloxane resin transformation maximizing the fracture resistance of the composite was identified. The fractographic analysis of the fracture surfaces revealed the differences in the acting fracture mechanism.
Permanent Link: http://hdl.handle.net/11104/0238482