Method of making a protective coating forming a thermal...

Details Method of making a protective coating forming a thermal... Method of making a protective coating forming a thermal...

2006-03-14

2006-03-14

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S670000, C428S650000, C428S680000, C416S24100B

Reexamination Certificate

active

07011894

ABSTRACT:
A protective coating forming a thermal barrier is made on a superalloy metal substrate by forming a bonding underlayer on the substrate, the bonding underlayer being constituted by an intermetallic compound comprising at least aluminum and a metal from the platinum group, and by forming a ceramic outer layer which is anchored on a film of alumina present on the surface of the bonding underlayer. The bonding underlayer preferably has a thickness of less than 50 μm and is made by using physical vapor deposition, e.g. by cathode sputtering, to deposit a plurality of individual layers alternately of aluminum and of a metal from the platinum group, and by causing the metals in the resulting layers to react together exothermally.

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J. R. Nicholls, et al., Proceeding of the 1996 125thTMS Annual Meeting, pps. 199-208, “Platinum Aluminide Diffusion Barrier for the Oxidation Protection of Titanium and Titanium Intermetallic Alloys,” Feb. 4-8, 1996 (submitting English Abstract only).

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