High temperature seal for joining ceramic components such as...

Details High temperature seal for joining ceramic components such as... High temperature seal for joining ceramic components such as...

2011-08-02

2011-08-02

Zimmerman, John J (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

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

C428S622000, C428S632000, C428S660000, C428S670000, C428S672000

Reexamination Certificate

active

07989086

ABSTRACT:
A multi-layer seal arrangement includes a dissolution barrier between a braze alloy and a ceramic component. The inventive seal is useful for joining a ceramic component to another ceramic component or a metal component, for example. In one example, the braze comprises a gold alloy and the dissolution barrier comprises a layer of alumina on the order of 2-3 microns thick. A titanium wetting layer is provided between the alumina layer and the alloy. A metallization layer provided between the dissolution barrier and the ceramic component in one example comprises a layer of gold between two thin layers of titanium. In one particular example, a platinum mesh is included with the gold of the braze alloy to control braze flow during the brazing operation.

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