Institute of Physics of Materials AS CR, v. v. i. > Projects > Fundamental aspects of partial pyrolysis of hybrid composites with polysiloxane matrix precursors

Fundamental aspects of partial pyrolysis of hybrid composites with polysiloxane matrix precursors

Co-investigatorIng. Zdeněk Chlup, Ph.D.
Number of Project17-12546S
AgencyGrantová agentura České republiky
Duration2016-12-31 - 2019-12-30

Anotace
The aim of the proposed project is to explain changes which occur during the thermally induced conversion of aromatic and aliphatic siloxane resins into silicon oxycarbide SiOC. The subject of the research will be SiOC precursors in a transitional state between an organo-silicon polymer and inorganic material. The effect of the pyrolysis on the adhesion between the matrix and the silicate (basalt and glass) fibres in composites with partially pyrolyzed SiOC precursor matrices will be investigated, in order to optimise these composites. The optimisation will be aimed at increasing the composites’ stability during long-term heat exposure while maintaining their mechanical strength. To this end, in addition to the above-mentioned elucidation and optimisation of the pyrolysis process, improvements of the composite surface layer will be tested. An important sub-objective will be the minimisation of the pyrolysis shrinkage of the SiOC precursors, namely through the incorporation of micron-, resp. submicron- powdered SiOC, and of the related SiC and SiO2 as a filler prior to the pyrolysis.


2021

Černý M., Chlup Z., Strachota A., Brus J., Schweigstillová J., Rýglová Š., Bičáková O.: In-situ measurement of mechanical properties and dimensional changes of preceramic thermosets during their pyrolysis conversion to ceramics using thermomechanical analysis. Ceram. Int. 47 (2021) 23285-23294



2020

Černý M., Chlup Z., Strachota A., Halasová M., Schweigstillová J., Kácha P., Svítilová J.: Potential of glass basalt or carbon fibres for reinforcement of partially pyrolysed compositeswith improved temperature and fire resistance. Ceramics - Silikáty 64 (2020) 115-124

Chlup Z., Černý M., Kácha P., Hadraba H., Strachota A.: Fracture resistance of partially pyrolysed polysiloxane preceramic polymer matrix composites reinforced by unidirectional basalt fibres. J. Eur. Ceram. Soc. 40 (2020) 4879-4885



2019

Halasová M., Kuběna I., Roupcová P., Černý M., Strachota A., Chlup Z.: Iron precipitation in basalt fibres embedded in partially pyrolysed methylsiloxane matrix. Composites Part A 123 (2019) 286-292

Chlup Z., Černý M., Halasová M., Strachota A.: Behaviour of Partially Pyrolysed Composite Reinforced by Fibres of Various Compositions. Procedia Struct. Integr. 23 (2019) 505-510



2018

Chlup Z., Černý M., Strachota A., Hadraba H., Halasová M.: Effect of the exposition temperature on the behaviour of partially pyrolysed hybrid basalt fibre composites. Composites B 147 (2018) 122-127

Halasová M., Černý M., Strachota A., Chlup Z.: Effect of Pyrolysis Temperature on the Mechanical Response in Partially Pyrolysed Polysiloxanes. Key Eng. Mater. 784 (2018) 55-60