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AssigneeAlfred E. Mann Foundation for Scientific Research
InventorsGuangqiang Jiang, Attila Antalfy
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A method of braze bonding a stainless steel part to a titanium part by heating a component assembly comprised of the titanium part, the stainless steel part, and a very thin substantially pure nickel foil filler material placed between the two parts and heated at a temperature that is greater than the temperature of the eutectic formed between the titanium part and the substantially pure nickel filler material, but that is less than the melting point of either the filler material, the stainless steel part, or the titanium part. The component assembly is held in intimate contact at temperature in a non-reactive atmosphere for a sufficient time to develop a hermetic and strong bond between the stainless steel part and the titanium part. The bonded component assembly is optionally treated with acid to remove any residual free nickel and nickel salts, to assure a biocompatible component assembly for implantation in living tissue.
A method of hermetically sealing a stainless steel and titanium component assembly for implantation in living tissue, comprising the steps of:
The method of claim 11 wherein said titanium part is selected from the group consisting of titanium and its alloys.
A method of bonding a Ti—6Al—4V metal part to a stainless steel part making a hermetically sealed component assembly for implantation in living tissue, comprising the steps of:
A method of bonding a stainless steel part to a titanium part to form a component assembly for placement in living tissue in which a filler is placed between the two parts to be bonded, applying a compressive force of 2 to 500 psi to said stainless steel part and said titanium part so as to place said filler in compression to form intimate contact between said stainless steel part, said titanium part and said filler, said filler being a metal which forms a eutectic alloy with said titanium part, said eutectic alloy consisting of metals comprising said titanium part and said filler and having a eutectic temperature that is lower than the melting point of said titanium or of said filler, and in which said component assembly, comprising said stainless steel part, said titanium part and said filler, is placed at a bonding temperature, for a predetermined time, that is less than the melting point of said titanium part, said stainless steel part or said filler, but where said bonding temperature is greater than the melting point temperature of said eutectic alloy, selecting said stainless steel part from the group consisting 200, 300, and 400 series stainless steel, selecting said titanium part from the group consisting of titanium and titanium alloys, wherein the improvement comprises:
Dependencies are inferred from the claim text.