Article for transporting a hot, oxidizing gas

Details Article for transporting a hot, oxidizing gas Article for transporting a hot, oxidizing gas

1998-02-17

1999-08-17

Zimmerman, John J.

Stock material or miscellaneous articles

Composite

Of metal

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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patent: 5116691 (1992-05-01), Darolia et al.
patent: 5262245 (1993-11-01), Ulion et al.

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