| Autor: |
Niu, Y., Wu, W. T., Boone, D. H., Smith, J. S., Zhang, J. Q., Zhen, C. L., Niu, Y., Wu, W. T., Boone, D. H., Smith, J. S., Zhang, J. Q., Zhen, C. L. |
| Zdroj: |
Journal de Physique IV - Proceedings; December 1993, Vol. 3 Issue: 1 pC9-511-C9-519, 5119511p |
| Abstrakt: |
The oxidation of both low and high-activity simple and Pt-modified aluminide coatings on nickel base superalloy IN738 has been studied in static air at 1100 °C up to 1000 h. For all coatings oxidation followed a parabolic law up to 400 h. The two Pt-modified coatings showed better protectiveness with lower mass gains and smaller rate constants, especially for long reaction times. The presence of Pt significantly improved the resistance to γ'-Ni3Al formation, promoted selective oxidation of aluminium by preventing the transport of other elements outwards to Al2O3scale and resulted in the formation of purer, slower-growing and more adherent A12O3scales, delaying the onset of scale spalling for two types of coatings and of oxide nodules growth for the high aluminium activity coating. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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