Coating and bonding of metals
AssigneeImperial Chemical Industries PLC
InventorFrank Smith
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Abstract
The inside of a sheath of titanium, zirconium or tantalum (or an alloy of one of said metals) is coated with a tinning metal or alloy by heating the sheath while the inside of the sheath is covered with the molten tinning metal, and moving an ultrasonically excited probe over substantially the whole of the outer surface of the sheath, said probe being in contact with the outer surface of the sheath. The coated sheath is then bonded as by soldering to a metal article such as copper or aluminum.
Claims19
A method of making a composite by bonding a tube-like sheath of titanium, zirconium or tantalum (or an alloy of one of the said metals) to a copper or aluminum article which comprises the steps of
- i. coating the inner surface of the sheath of titanium, zirconium or tantalum (or an alloy of one of the said metals) with a tinning metal or alloy by heating the said sheath to a temperature in the range 350.degree. C to 450.degree. C while the inner surface is covered with the tinning metal or alloy in the molten state and moving an ultrasonically excited probe over substantially the whole of the outer surface of the sheath, said probe being in contact with said outer surface and
- ii. surrounding the article with the coated sheath thus obtained and soldering together the sheath and the article.
Dependencies are inferred from the claim text.