Abstract
Aluminum and chromium coatings on nickel base super alloys show precipitations of a brittle phase after exposure to hot combustion gases. The precipitations are localized mainly in the transient area between coating and base material. Microanalytical investigations yield a close connection between the failure of the coating and the formation of needle shaped precipitations - mainly Cr-carbides - in the interface area of coating and base material. Auger analytical investigations and chemical analyses reveal distinct concentrations of nitrogen in the needle shaped area. The investigations revealed that the failure of the coating is mainly caused by the high content of nitrogen in the hot gases.
| Translated title of the contribution | Influence of Hot Gas Atmospheres on Creep Rupture Behavior and Structure of Coated Nickel Base Alloys. |
|---|---|
| Original language | English |
| Pages (from-to) | 255-264 |
| Number of pages | 10 |
| Journal | Materials and Corrosion |
| Volume | 32 |
| Issue number | 6 |
| State | Published - 1981 |
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