Ortona, Alberto and Pusterla, Simone and Pizzi, Antonio and Fierro, Vanessa (2013) Structure and oxidation resistance of micro-cellular Si–SiC foams derived from natural resins. Ceramics International. ISSN 0272-8842
Full text not available from this repository.Abstract
Microcellular Si–SiC porous ceramics were prepared from rigid foams derived from tannin-based natural resins. Such natural foams were used either as such, i.e. in the “green” state, or after conversion at 900 °C into vitreous cellular carbon foams. Various preparation methods were tested: replica with preceramic polymers followed by pyrolysis, liquid silicon infiltration (LSI) and vapour silicon infiltration (VSI). Depending on the method, very different materials have been obtained, whose morphology and microstructure have been investigated by SEM, XRD and Raman, whereas oxidation resistance has been evaluated by weight loss measurements in dry air at high temperature. The resulting porous ceramics' properties were discussed in relation to the preparation methods and their morphology and conversion of tannin-based foams into SiC.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Subjects: | Engineering Engineering > Mechanical engineering |
| Department/unit: | Dipartimento tecnologie innovative > Istituto di ingegneria meccanica e tecnologia dei materiali |
| Depositing User: | Marco Pelanconi |
| Date Deposited: | 30 Jun 2020 13:14 |
| Last Modified: | 30 Jun 2020 13:14 |
| URI: | http://repository.supsi.ch/id/eprint/11730 |
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