Metal alloy compositions and articles comprising the same

Details Metal alloy compositions and articles comprising the same Metal alloy compositions and articles comprising the same

2011-04-26

2011-04-26

Choi, Ling-Siu (Department: 1761)

Metal treatment

Stock

Nickel base

C148S022000, C148S410000, C428S680000, C428S656000, C428S678000, C106S001050

Reexamination Certificate

active

07931759

ABSTRACT:
Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is Nickel, or Nickel in combination with cobalt and/or iron. The compositions further comprise a lanthanide, a group 4 metal selected from hafnium, zirconium, titanium, or a combination of these, and optionally, a group 14 element selected from silicon and/or germanium. The combination results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.

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