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-investigator | Ing. Zdeněk Chlup, Ph.D. |
Number of Project | 17-12546S |
Agency | Grantová agentura České republiky |
Duration | 2016-12-31 - 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. |