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Herstellung keramischer Faserverbundwerkstoffe mit thermoplastischen Kohlenstoffpräkursoren im Flüssigsilizierverfahren (Volume 13) (English shop)
Florian Reichert (Author)Preview
Extract, PDF (900 KB)
Table of Contents, PDF (560 KB)
The production of C/C-SiC materials by means of liquid silicon infiltration and thermoplastic carbon precursors is investigated. Starting from commercial thermoplastic polymers, a multi-stage selection procedure identified two plastics — the polyetherimide PEI Ultem1000 from Sabic and the polyetheretherketone KT880FP from Solvay — as suitable precursors for the production of fabric-reinforced C/C-SiC in a hot pressing process. Through a thermal fibre pretreatment in a nitrogen atmosphere, the fibre-matrix interaction can be adjusted for both polymers by the continuous removal of the functional oxygen groups on the fibre surface. The result is improved mechanical properties in the C/C-SiC state, with a 4-point bending strength of > 220 MPa being achieved with the PEEK KT880FP precursor at a fibre pretreatment temperature of 700–800 °C. A further increase in the fibre pretreatment temperature leads to increasing fibre-matrix debonding during pyrolysis. This enhances SiC formation during liquid silicon infiltration.
| ISBN-13 (Hard Copy) | 9783736998971 |
| ISBN-13 (eBook) | 9783736988972 |
| Language | German |
| Page Number | 172 |
| Lamination of Cover | matt |
| Edition | 1. |
| Book Series | Schriftenreihe Keramische Werkstoffe |
| Volume | 13 |
| Publication Place | Göttingen |
| Place of Dissertation | Bayreuth |
| Publication Date | 2020-03-30 |
| General Categorization | Dissertation |
| Departments |
Engineering
|
| Keywords | Siliconization, thermoplastic, composite material, precursor, CMC, ceramic matrix composite, fiber reinforcement, pyrolysis, Raman spectroscopy, XPS, photoelectron spectroscopy, carbon fiber, silicon carbide, silicon, C/C-SiC, carbon matrix, X-ray photoelectron spectroscopy, mechanical testing, liquid silicon infiltration process, liquid siliconization, capillary siliconization, polyetheretherketone, PEEK, polyetherimide, PEI, pyrolysis, carbonization, graphitization, hot pressing, carbon precursor, thermoset |
