Wen, Qingbo and Riedel, Ralf and 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, Elsevier Science BV, Netherlands, pp. 191-198, 145, ISSN 0010-938X, DOI: 10.1016/j.corsci.2018.10.005, [Online-Edition: https://www.sciencedirect.com/science/article/pii/S0010938X1...],
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2018 |
| Creators: | Wen, Qingbo and Riedel, Ralf and Ionescu, Emanuel |
| Title: | Significant improvement of the short-term high-temperature oxidation resistance of dense monolithic HfC/SiC ceramic nanocomposites upon incorporation of Ta |
| Language: | English |
| 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. |
| Journal or Publication Title: | Corrosion Science |
| Volume: | 145 |
| Publisher: | Elsevier Science BV, Netherlands |
| Uncontrolled Keywords: | Ceramic High-temperature corrosion Kinetic parameters Oxidation Tantalum oxide |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 19 Nov 2018 15:16 |
| DOI: | 10.1016/j.corsci.2018.10.005 |
| Official URL: | https://www.sciencedirect.com/science/article/pii/S0010938X1... |
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