On materials resistant to oxidation for hot-gas turbines and jet units. Pt.1

The highly alloyed chromium and chromium-nickel steels represent an excellent material for the construction of gas turbines operating at high temperatures and jet engines with isothermic and cyclic temperature guidance. Aluminum containing nickel-chromium alloys are superior in their oxidation behavior compared to the corresponding cobalt-chromium alloys. The presence of small amounts of halides and sulfur compounds in the combustion gases require additions of particular compounds to the alloys to save the expensive high-grade alloys against corrosion at high temperatures. In order to limit the expenses of the alloys, it is necessary to focus the development on oxidation resistant layer coated on the basic alloy. (orig./IHO)