A common task in engineering - to permanently and hermetically join two or more components (such as attaching flanges to bellows expansion joints) - is often accomplished by welding, brazing or soldering.
However, this becomes challenging, costly or impossible when:
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One of the articles being joined is made of a material that can not be welded and/or soldered
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The presence of solder in the joint is unacceptable
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An item is too thin for welding
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One of the items is non-metallic
Adhesives can be used in such cases, but then the joint does not provide electrical or thermal conductivity, and often is not as durable and mechanically strong as a metal-to-metal joint.
Electrojoining is an electroforming-based joining technique in which two or more items are permanently and hermetically bonded together by a tightly adherent electroplated layer. Exceptionally strong mechanically, such joints, when properly executed, are also air- and helium-tight, and have excellent thermal and electrical conductance.
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