TU Darmstadt / ULB / TUbiblio

Significant improvement of the short-term high-temperature oxidation resistance of dense monolithic HfC/SiC ceramic nanocomposites upon incorporation of Ta

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
Article, Bibliographie

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 ; Riedel, Ralf ; Ionescu, Emanuel
Type of entry: Bibliographie
Title: Significant improvement of the short-term high-temperature oxidation resistance of dense monolithic HfC/SiC ceramic nanocomposites upon incorporation of Ta
Language: English
Date: December 2018
Publisher: Elsevier Science BV, Netherlands
Journal or Publication Title: Corrosion Science
Volume of the journal: 145
DOI: 10.1016/j.corsci.2018.10.005
URL / URN: https://www.sciencedirect.com/science/article/pii/S0010938X1...
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.

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
Last Modified: 19 Nov 2018 15:16
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details