Francis, Adel and Ionescu, Emanuel and Fasel, Claudia and Riedel, Ralf (2009):
Crystallization Behavior and Controlling Mechanism of Iron-Containing Si−C−N Ceramics.
In: Inorganic Chemistry, 48 (21), ACS, pp. 10078-10083, ISSN 0020-1669,
[Online-Edition: http://dx.doi.org/10.1021/ic900934u],
[Article]
Abstract
The crystallization behavior and controlling mechanism of the Si−Fe−C−N system based on polymer-derived SiCN ceramic filled with iron metal powder has been studied. The composite preparation conditions allow the formation of a random distribution of metallic particles in the polymer matrix volume for the Si−C−N system. Pyrolysis of the composite material at 1100 °C indicates the presence of one crystalline phase Fe3Si. While the sample pyrolyzed at 1200 °C reveals the formation of both Fe3Si and Fe5Si3 phases, a crystallization of β−SiC is additionally observed by increasing the temperature up to 1300 °C. The propensity for the formation of SiC is due to the presence of Fe5Si3, where a solid−liquid−solid (SLS) growth mechanism was suggested to occur. X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA), and thermal gravimetric analysis with mass spectroscopic detection (TGA-MS) were employed to investigate the crystallization behavior of the Si−Fe−C−N system.
| Item Type: | Article |
|---|---|
| Erschienen: | 2009 |
| Creators: | Francis, Adel and Ionescu, Emanuel and Fasel, Claudia and Riedel, Ralf |
| Title: | Crystallization Behavior and Controlling Mechanism of Iron-Containing Si−C−N Ceramics |
| Language: | English |
| Abstract: | The crystallization behavior and controlling mechanism of the Si−Fe−C−N system based on polymer-derived SiCN ceramic filled with iron metal powder has been studied. The composite preparation conditions allow the formation of a random distribution of metallic particles in the polymer matrix volume for the Si−C−N system. Pyrolysis of the composite material at 1100 °C indicates the presence of one crystalline phase Fe3Si. While the sample pyrolyzed at 1200 °C reveals the formation of both Fe3Si and Fe5Si3 phases, a crystallization of β−SiC is additionally observed by increasing the temperature up to 1300 °C. The propensity for the formation of SiC is due to the presence of Fe5Si3, where a solid−liquid−solid (SLS) growth mechanism was suggested to occur. X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA), and thermal gravimetric analysis with mass spectroscopic detection (TGA-MS) were employed to investigate the crystallization behavior of the Si−Fe−C−N system. |
| Journal or Publication Title: | Inorganic Chemistry |
| Volume: | 48 |
| Number: | 21 |
| Publisher: | ACS |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 13 Apr 2012 09:16 |
| Official URL: | http://dx.doi.org/10.1021/ic900934u |
| Identification Number: | doi:10.1021/ic900934u |
| Funders: | This work was financially supported by the Alexander von Humboldt (AvH) foundation., A.F. is grateful to the AvH foundation for support in the form of the Georg-Forster fellowship for experienced researchers., R.R. acknowledges the financial support by the Fonds der Chemischen Industrie, Frankfurt, Germany. |
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