| 摘要 |
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 an d 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 diffus ed 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 t o provide the subject coating over the fastening portion (16) of the blade (10).
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