Oxidation behavior of platinum–aluminum alloys and the effect of Zr doping
| Autor: | Bruce A. Pint, K. B. Alexander, Elizabeth C. Dickey, Ian G. Wright |
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| Rok vydání: | 1999 |
| Předmět: |
Nial
Materials science Mechanical Engineering Metallurgy Zirconium alloy Energy-dispersive X-ray spectroscopy Analytical chemistry chemistry.chemical_element Condensed Matter Physics Microstructure Isothermal process chemistry Mechanics of Materials Aluminium General Materials Science Grain boundary Platinum computer computer.programming_language |
| Zdroj: | Journal of Materials Research. 14:4531-4540 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.1999.0615 |
| Popis: | The isothermal and cyclic oxidation behavior of PtAl and PtAl + Zr was studied followed by postoxidation microstructural and microchemical analyses. Their isothermal oxidation performance at 1200 °C was similar to that of NiAl and NiAl + Zr. In short (1-h) cycles, the cyclic oxidation resistance of undoped PtAl was found to be substantially better than NiAl. However, with longer (100-h) cycles, little improvement in the metal consumption rate was observed relative to NiAl. The addition of Zr to PtAl significantly improved cyclic oxidation performance in both short- and long-cycle tests. Spatially resolved energy dispersive spectroscopy indicated Zr segregation to both the metal–oxide interface and Al2O3 grain boundaries. |
| Databáze: | OpenAIRE |
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