Laminated brazing alloys

Joining materials with different coefficients of thermal expansion is challenging in brazing technology. Differing rates and amounts of expansion at joints can, in the worst case, lead to cracks in the materials to be joined.  To compensate for the stress gradient between the two materials to be joined, a laminated brazing alloy that consists of three layers can be used. A layer of copper is introduced between the two outer braze-alloy layers. Due to it’s ductility, the copper layer is able to compensate for the mechanical stresses, reducing the probability of cracking.