| 简介 |
FIELD : metallurgy.
SUBSTANCE : invention relates to metallurgy, particularly to alloys for protective coatings for protection of structural element from corrosion and/or oxidation. Nickel-based alloy for protection of structural element of gas turbine against corrosion and/or oxidation at high temperatures contains, wt% : from more than 22 to less than 24 cobalt (Co), from 14 to less than 16 chromium (Cr), 10.5-11.5 aluminium (Al), 0.2-0.4, at least one element from a group including scandium (Sc) and rare-earth elements, in particular yttrium (Y), optionally, from 0.3 to 0.9 tantalum (Ta) , nickel (Ni) - balance. Structural element (120, 130, 155) of gas turbine (100) comprises a substrate (4) made from alloy based on nickel or cobalt, and protective coating (7) of said composition. Optionally, protective coating (7) can be coated with a ceramic thermal barrier coating (10).
EFFECT : alloy and protective layer have high-temperature resistance to corrosion and oxidation.
12 cl, 5 dwg |
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