Process for coating silver indium alloy metallic seal

Details Process for coating silver indium alloy metallic seal Process for coating silver indium alloy metallic seal

2011-08-16

2011-08-16

Fletcher, III, William Phillip (Department: 1717)

Stock material or miscellaneous articles

All metal or with adjacent metals

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

C428S672000, C428S673000, C428S680000, C427S383100, C427S404000, C427S405000, C205S170000, C205S266000

Reexamination Certificate

active

07998593

ABSTRACT:
A process for the manufacture of a metallic seal comprising applying a first intermediate layer to a base metal, applying a second intermediate layer overlying the first intermediate layer, applying a first coating layer comprising silver overlying the second intermediate layer, applying a second coating layer comprising indium overlying the first coating layer, baking the base metal with applied intermediate and coating layers at a temperature to diffuse the coating layers to form a silver indium alloy coating layer. A seal comprising a substrate having a metal surface, a first intermediate layer overlying the base metal, a second intermediate layer overlying the first intermediate layer, an alloy coating layer overlying the second intermediate layer, wherein the alloy coating layer comprises a silver indium alloy.

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“Silver Plating Nickel Strike, High Bake,” SAE International Aerospace Material Specification, Jan. 1994, 7 pages.
“Silver Plating for High Temperature Applications,” SAE International Aerospace Material Specification, Apr. 1999, 8 pages.

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