Wen, Qingbo ; Riedel, Ralf ; Ionescu, Emanuel (2018)
Significant improvement of the short-term high-temperature oxidation resistance of dense monolithic HfC/SiC ceramic nanocomposites upon incorporation of Ta.
In: Corrosion Science, 145
doi: 10.1016/j.corsci.2018.10.005
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The short-term oxidation (i.e., exposure time of up to 20 h) of dense monolithic (Hf,Ta)C/SiC-based ceramic nanocomposites at temperatures from 1200 to 1500 °C is presented and discussed. The oxidation behavior of HfC/SiC is similar to that of other UHTCs, indicating that it is mainly determined by the HfC phase. Ta incorporation into HfC leads to a strong decrease of the parabolic oxidation rates (3–4 orders of magnitude). Unlike HfC/SiC, Ta-containing nanocomposites form continuous multiphasic scales consisting of HfO2, Ta2O5 and Hf6Ta2O17, which are able to densify quickly during the oxidation process.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Wen, Qingbo ; Riedel, Ralf ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Significant improvement of the short-term high-temperature oxidation resistance of dense monolithic HfC/SiC ceramic nanocomposites upon incorporation of Ta |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2018 |
| Verlag: | Elsevier Science BV, Netherlands |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Corrosion Science |
| Jahrgang/Volume einer Zeitschrift: | 145 |
| DOI: | 10.1016/j.corsci.2018.10.005 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S0010938X1... |
| Kurzbeschreibung (Abstract): | The short-term oxidation (i.e., exposure time of up to 20 h) of dense monolithic (Hf,Ta)C/SiC-based ceramic nanocomposites at temperatures from 1200 to 1500 °C is presented and discussed. The oxidation behavior of HfC/SiC is similar to that of other UHTCs, indicating that it is mainly determined by the HfC phase. Ta incorporation into HfC leads to a strong decrease of the parabolic oxidation rates (3–4 orders of magnitude). Unlike HfC/SiC, Ta-containing nanocomposites form continuous multiphasic scales consisting of HfO2, Ta2O5 and Hf6Ta2O17, which are able to densify quickly during the oxidation process. |
| Freie Schlagworte: | Ceramic High-temperature corrosion Kinetic parameters Oxidation Tantalum oxide |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 19 Nov 2018 15:16 |
| Letzte Änderung: | 19 Nov 2018 15:16 |
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