Microstructure and oxidation behaviour of Ir-rich Ir–Al binary alloys
| Autor: | Yoko Yamabe-Mitarai, Z. B. Bao, Hideyuki Murakami |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
General Chemical Engineering High-temperature corrosion Metallurgy Alloy Intermetallic Oxide chemistry.chemical_element General Chemistry engineering.material Microstructure Isothermal process Corrosion chemistry.chemical_compound chemistry Chemical engineering engineering General Materials Science Iridium |
| Zdroj: | Corrosion Science. 87:306-311 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2014.06.038 |
| Popis: | In the current study, alloys of Ir–11Al, Ir–23Al, Ir–30Al, Ir–41Al and Ir–45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir–Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100 °C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir–23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir–45Al followed a parabolic law, showing the best oxidation resistance among the Ir–Al alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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