Thermal and oxidation resistant barrier on carbon fiber with Si and Si–Ti based pre-ceramic coatings for high temperature application
| Autor: | MA Shayed, Chokri Cherif, Rolf-Dieter Hund, Heike Hund |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Thermal oxidation
Materials science Polymers and Plastics Thermal resistance Oxidation resistant 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Kohlefaser thermische Beständigkeit Oxidationsbeständigkeit Beschichtungen thermo-mechanische Eigenschaften ddc:670 visual_art Thermal visual_art.visual_art_medium ddc:660 Chemical Engineering (miscellaneous) carbon fiber thermal resistance oxidation resistance coatings thermo-mechanical properties Ceramic Composite material 0210 nano-technology Oxidation resistance |
| Popis: | Carbon fiber (CF) must be protected from thermal oxidation for high temperature application because of its low thermo-oxidative stability above 450℃ in air. CF is now increasingly being used as a reinforcing material in the construction industry. A thermal and oxidation resistant coating is necessary for CF-reinforced concrete (CFRC) composites in order to satisfy a high level of safety standard in the case of fire. New types of pre-ceramic coatings, such as Tyranno® polymer (Si–Ti based pre-ceramic) and SiO2 sol–gel, have been deposited on CF filament yarn by means of a wet chemical continuous dip coating method. The results of surface analyses, e.g. scanning electron microscopy, X-ray photoelectron spectroscopy, and infrared spectroscopy, showed the changes in topographical properties of CF caused by the coatings. Thermogravimetric analysis proved that the high temperature (up to 800℃) oxidation stability of CF was considerably improved due to the coatings. Tensile test results indicated that the strength of CF yarn at 20℃ was increased by up to 80% with the coatings. Thermo-mechanical properties were also enhanced up to 600℃. CF yarn retains its original strength and elasticity modulus, i.e. the stiffness at 700℃, with a Tyranno® polymer coating. |
| Databáze: | OpenAIRE |
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