Article for transporting a hot, oxidizing gas

Stock material or miscellaneous articles – Composite – Of metal

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428701, 420 34, 420 40, 420436, 420438, 420443, 420447, 420449, 420450, B32B 1504, C22C 1905, C22C 1907, C22C 3818

Patent

active

059392045

ABSTRACT:
An article that is used to transport a hot oxidizing gas, in particular a flue gas in a gas turbine, has a surface acted upon by the gas. This surface is formed by an alloy which has 10 to 40 wt. % chrome, 1 to 20 wt. % gallium and optionally other specific elements in a base including at least one element from the group of iron, cobalt and nickel. In the alloy the gallium replaces aluminum and/or silicon. The alloy is deposited especially as a protective layer on a superalloy substrate and optionally coated with a gas-permeable ceramic layer.

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