Corrosion screening tests of high-performance ceramics in supercritical water containing oxygen and hydrochloric acid
| Autor: | Nikolaos Boukis, Rolf Janssen, Klaus Ebert, Nils Claussen, M. Schacht |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Supercritical water oxidation
Materials science Metallurgy chemistry.chemical_element Hydrochloric acid Oxygen Decomposition Supercritical fluid Corrosion chemistry.chemical_compound chemistry Chemical engineering visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary diffusion coefficient Ceramic |
| Zdroj: | Journal of the European Ceramic Society. 17:71-76 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/s0955-2219(96)00072-6 |
| Popis: | The corrosion of various ceramic materials in simulated supercritical water oxidation (SCWO) environment was measured. Supercritical water with 0.44 mol kg −1 oxygen and 0.05 mol kg −1 hydrochloric acid was used to simulate typical SCWO conditions after the decomposition of the organic material. The experimental temperature was 465 °C and the pressure 25 MPa. The experiments were performed within a reactor with an inner surface made of alumina. In this very corrosive fluid only a few Al 2 O 3 - and ZrO 2 -based materials did not corrode severely. Homogeneous surface attack and grain boundary diffusion were observed. HIP-BN, B 4 C, TiB 2 , Y 2 O 3 and Y-TZP disintegrated. SiC and Si 3 N 4 -based materials showed a large weight loss, up to above 90%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect