C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/24
C25D 3/12 (2006.01) C25D 3/20 (2006.01) C25D 5/50 (2006.01) C25D 15/02 (2006.01) F01D 5/28 (2006.01)
Patent
CA 1268139
ABSTRACT OF THE DISCLOSURE A substrate such as a single crystal gas turbine blade is given a protective coating by composite electrodeposition of a metal matrix M1 containing particles of CrA1M2, where M1 is Ni or Co or Fe and M2 is Y, Si, Ti, or a rare earth element. The preferred matrix is Ni or Co or NiCo and the preferred particles are CrA1Y. The particle size is important and preferably 75% by weight of the particles are between 3.9 and 10.5 µm. The coating is heat treated to produce interdiffusion between the constituents of the matrix and the particles.
492291
Foster John
Honey Francis John
Kedward Eric Charles
Restall James Edward
Fetherstonhaugh & Co.
Praxair St Technology Inc
Secretary Of State For Defence (the)
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