Direct liquid phase bonding of ceramics to metals
AssigneeBorg-Warner Corporation
InventorKostas F. Dockus
Life of this patent
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Abstract
The direct liquid phase bonding of ceramics to metals or other ceramics in an inert atmosphere without prior metallization wherein a nickel-plated aluminum-silicon brazing alloy or aluminum or aluminum alloy filler material between the ceramic and metal layers provides a joint of high strength at a low bonding temperature without affecting the ceramic microstructure or the mechanical properties of the materials. This technique is also useful for fabricating composite laminates.
Claims13
A method of bonding at least two material layers together, at least one layer being a ceramic, comprising the steps of cleaning the surfaces of the layers to be bonded, plating a brazing alloy sheet with nickel, nickel-lead or cobalt-lead, sandwiching the plated brazing alloy between the material layers to be bonded, heating the material layers and brazing alloy to a temperature in the range of 1100.degree. to 1200.degree. F. for a time period of three to five minutes in an inert atmosphere or vacuum, and cooling the bonded article.
Dependencies are inferred from the claim text.