TURBINE ENGINE COMPONENTS WITH NON-ALUMINUM PROTECTIVE COATINGS CONTAINING SILICON AND CHROME AND METHODS FOR FORMING SUCH ALUMINUM-FREE PROTECTIVE COATINGS.

摘要

A turbine engine component (10) for use in a gas turbine engine, comprising: a nickel-based superalloy substrate (12) having a first section (28) with a surface that receives air flow ( 34) and a second section (32) used to secure the first section (28) to the gas turbine engine; and a protective coating without aluminide (14) at least in a portion of the second section (32), including chromium the protective coating without aluminide (14) that diffuses from the nickel-based superalloy substrate (12) and silicon of such that the protective coating without aluminide (14) contains a chromium silicide, a chromium oxide modified with silicon, or a silicate containing chromium.