Alstom

Abb Research Ltd.

Peter David Holmes

Maxim Konter

Hans-Peter Bossmann

Marianne Sommer

Hans Joachim Schmutzler

Christoph Toennes

Christoph Sommer

Christoph Tonnes

A nickel base alloy comprising: (measured in % by weight): 11-16% Co; 12.2-15.5% Cr; 6.5-7.2% Al; 3.2-5.0% Re; 1.0-2.5% Si; 1.5-4.5% Ta; 0.2-2.0% Nb; 0.2-1.2% Hf; 0.2-1.2% Y; 0-1.5% Mg; 0-1.5% Zr; 0-0.5% La and La series elements; 0-0.15% C; 0-0.1% B; and a remainder including Ni and impurities. The alloy is particularly suited for coatings for gas turbine components such as gas turbine blades and vanes.

Nickel base alloy

A coating composition for superalloy structural parts, especially, for gas turbine vanes and blades, which has high resistance to oxidation and corrosion and has excellent mechanical behavior. The coating preferably comprises: 18 to 28 wt % of Co; 11 to 15 wt % of Cr; 11.5 to 14 wt % of Al; 1 to 8 wt % of Re; 1 to 2.3 wt % of Si; 0.2 to 1.5 wt % of Ta; 0.2 to 1.5 wt % of Nb; 0.3 to 1.3 wt % of Y; 0 to 1.5 wt % of Mg; 0 to 0.5 wt % of a total of La and La-series; 0 to 0.1 wt % of B; less than 0.1 wt % of Hf; and less than 0.1 wt % of C. The balance of the coating is Ni. A total of Y, La, and La-series is from 0.3 to 2.0 wt %, and a total of Si and Ta is equal to or less than 2.5 wt %.

High temperature protective coating

The invention relates to a coating composition for superalloy structural parts, especially for gas turbine vanes and blades, which provides simultaneously excellent environmental resistance and highly improved thermomechanical behavior. The coating consists essentially of, by weight, 28-35% Co, 11-15% Cr, 10-13% Al, 0-1% Re, 1-2% Si, 0.2-1% Ta, 0.005-0.5% Y, 0-5% Ru, 0-1% Ca, 0-1% Mg, 0-0.5% La (or elements from the La series), 0-0.1% B, balance Ni and incidental impurities.

Coating composition for high temperature protection

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Winkel, Switzerland

Peter David Holmes