Biocompatible implantable component assembly for use in living tissue made of a stainless steel part bonded to a titanium part using nickel filler material and method to produce it

摘要

The invention is a method of 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 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.