Corrosion of Zirconia Ceramics in Acidic Solutions at High Pressures and Temperatures
| Autor: | Nikolaos Boukis, Rolf Janssen, Nils Claussen, M. Schacht, Eckhard Dinjus, F. Meschke, Klaus Ebert |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Magnesium Mechanical Engineering Inorganic chemistry chemistry.chemical_element Microstructure Corrosion Tetragonal crystal system chemistry Mechanics of Materials Phase (matter) Materials Chemistry Ceramics and Composites Cubic zirconia General Materials Science Yttria-stabilized zirconia Monoclinic crystal system |
| Zdroj: | Key Engineering Materials. :1677-1682 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.132-136.1677 |
| Popis: | Changes in microstructure and phase composition of ceria stabilized tetragonal zirconia polycrystals (Ce-TZP), magnesia and yttria partially stabilized zirconia [(Mg,Y)-PSZ] and magnesia partially stabilized zirconia (Mg-PSZ) were studied in diluted aqueous HCl, H2SO4 or H3PO4 solutions at a temperature of 390° C and a pressure of 27 MPa. Ce-TZP is corrosion resistant under these conditions in HCl, while Mg-PSZ is attacked severely and (Mg,Y)-PSZ undergoes a surface tetragonal to monoclinic phase transformation. All investigated zirconia ceramics suffer severe weight losses and transformation to the monoclinic phase on the surface in H2SO4. Only a small weight gain and a slight increase of m-phase on the surface of the ceramics is found in H3PO4. |
| Databáze: | OpenAIRE |
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