Oxidation behavior of platinum-aluminum alloys and the effect of Zr doping

Citation
Ec. Dickey et al., Oxidation behavior of platinum-aluminum alloys and the effect of Zr doping, J MATER RES, 14(12), 1999, pp. 4531-4540
Citations number
47
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS RESEARCH
ISSN journal
08842914 → ACNP
Volume
14
Issue
12
Year of publication
1999
Pages
4531 - 4540
Database
ISI
SICI code
0884-2914(199912)14:12<4531:OBOPAA>2.0.ZU;2-M
Abstract
The isothermal and cyclic oxidation behavior of PtAl and PtAl + Zr was stud ied followed by postoxidation microstructural and microchemical analyses. T heir isothermal oxidation performance at 1200 degrees C was similar to that of NiAl and NiAl + Zr. In short (1-h) cycles, the cyclic oxidation resista nce of undoped PtAl was found to be substantially better than NiAl. However , with longer (100-h) cycles, little improvement in the metal consumption r ate 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.