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, 145, pp. 191-198. Elsevier Science BV, Netherlands, ISSN 0010-938X,
DOI: 10.1016/j.corsci.2018.10.005,
[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 |
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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 |
Journal 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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