Abstract
According to the feature of Mg–Zn eutectic reaction, Al alloy was bonded to Mg alloy by contact reaction brazing using a zinc-based brazing alloy successfully. The experimental observations showed that Mg–Al intermetallic compounds were avoided for the addition of the zinc-based brazing alloy. The Mg substrate and the remanent brazing alloy were bonded with the reaction zone that formed along the zinc rich and magnesium poor interface. Only a few Mg–Zn intermetallic compounds (MgZn2) existed homogeneously in the reaction zone. The substrate and the remanent brazing alloy were bonded with a thin Al–Zn solution. The average tensile-shear strength of the final joints was a little lower than that of the zinc-based brazing alloy owning to some pores at the interface between the reaction zone and the remanent brazing alloy layer.
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