C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 10/58 (2006.01) C23C 26/02 (2006.01)
Patent
CA 2378908
A one-step method of forming diffused noble metal-aluminide coatings with or without minor incorporations of Si, Cr, Mn, Hf, La, and Y, is disclosed. With the inventive method, two or more powdered metals or metal alloys are applied and diffused into the metal substrate together, using a sequential multi-stage heating process. This method contrasts with the prior art technology where metals were applied and diffused into the substrate separately. Figure 8 is a schematic view (partly broken away and in section) of a typical turbine blade carrying a coating of the subject diffused platimum--aluminide coating. Turbine blade (10) includes a nickel- or cobalt-alloy body portion (12) provided with a diffused aluminide coating (14). It is usually undesirable to provide the subject coating over the fastening portion (16) of the blade (10).
L'invention concerne un procédé à étape unique de formation de revêtements nobles diffusés en aluminide de métal avec ou sans incorporations mineures de Si, de Cr, de Mn, de Hf, de La et d'Y. Selon le procédé, au moins deux métaux ou alliages métalliques sous forme pulvérulente sont appliqués sur un substrat métallique et diffusés ensemble dans ce dernier au moyen d'un procédé de chauffe séquentiel à étages multiples. Ce procédé diffère des techniques antérieures selon lesquelles les métaux étaient appliqués et diffusés dans le substrat séparément.
Creech George E.
Korinko Paul S.
Naik Subhash K.
Gowling Lafleur Henderson Llp
Rolls-Royce Corporation
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