C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
117/226, 75/7.1,
C22C 27/06 (2006.01) C22C 19/00 (2006.01) C23C 4/08 (2006.01) C23C 30/00 (2006.01)
Patent
CA 1153584
Abstract Of The Disclosure Coatings for iron-, nickel- and cobalt-base super- alloys. The coatings are applied in order to provide good oxidation/sulfidation and thermal fatigue resistance for the substrates to which the coatings are applied. The coatings consist essentially of, by weight, 10 to 50% chromium, 3 to 15% aluminum, 1. o 15% metal mixture from the group con- sisting of tantalum, tungsten, manganese and combinations thereof, up to 5% reactive metal from the group consisting of lanthanum, yttrium and other rare earth elements, up to 5 per- cent of rare earth and/or refractory metal oxide particles, and the balance selected from the group consisting of nickel, cobalt and iron, and combinations thereof. Additions of tita- nium up to 5% and noble metals up to 15% are also contemplated. Tantalum makes up at least 20% of the metal mixture or 0.5% of the total coating weight, whichever is greater. Tungsten, manganese, or a combination thereof, make up at least 0.5% of the total coating.
347713
Dardi Louis E.
Shankar Srinivasan
Howmet Turbine Components Corporation
Smart & Biggar
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