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The effect of sulfur and zirconium co-doping on the oxidation of nicral
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Smialek, James L. |
| Copyright Year | 1987 |
| Description | The adhesion behavior of Al2O3 scales formed on NiCrAl+Zr alloys was examined as a function of both sulfur and zirconium doping levels. In general, very high levels of zirconium were required to counteract the detrimental effects of sulfur. A sulfur-zirconium adherence map was constructed, as determined from the oxidation and spalling behavior in 1100 C cyclic tests. For low sulfur alloys, the amount of zirconium required for adherence at any given sulfur level can be described by Zr greater than 600 S sup 0.2 (in ppma). These results underscore the importance of sulfur to adhesion mechanisms and suggests that sulfur gettering is a first order effect of reactive element additions to MCrAl alloys. |
| File Size | 4133754 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880001558 |
| Archival Resource Key | ark:/13960/t0ps2p82h |
| Language | English |
| Publisher Date | 1987-10-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Scale Corrosion Zirconium Additives Nickel Alloys Temperature Effects Spalling Oxidation Chromium Alloys Sulfur Adhesion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
