High strength hot corrosion resistant single crystals...

Details High strength hot corrosion resistant single crystals... High strength hot corrosion resistant single crystals...

C - Chemistry, Metallurgy

22

C

75/113

C22C 19/05 (2006.01) C30B 11/00 (2006.01)

Patent

CA 1246903

-17- High Strength Hot Corrosion Resistant Single Crystals Containing Tantalum Carbide Abstract Corrosion resistant, high strength, superalloy single crystal articles are described. Starting with a nominal composition of 11.75% Cr, 9% Co, 1.75% Mo, 4.5% W, 2.5% Ta, 2.5% Al, 4% Ti, balance essentially nickel, intentional additions are made of carbon and extra tantalum. From 0.05-0.15% carbon is added along with sufficient tantalum to combine with the carbon to form tantalum carbon. The resultant articles have substantially improved hot corrosion resistance and creep properties.

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