In brazing, the bond is created by which mechanism?

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Multiple Choice

In brazing, the bond is created by which mechanism?

Explanation:
Capillary action drives the brazed joint. When the filler metal is molten, its ability to wet the cleaned surface of the parts creates capillary forces in the narrow joint clearance, pulling the liquid filler into the gap and along the interfaces. As it fills and then cools, a solid metallurgical bond forms where the filler meets the base metals. While wetting and adhesion help the filler spread, and diffusion occurs at the interface to strengthen the bond, the essential mechanism that creates the joint is the capillary flow of the molten filler. Oxidation would hinder wetting and thus prevent capillary action.

Capillary action drives the brazed joint. When the filler metal is molten, its ability to wet the cleaned surface of the parts creates capillary forces in the narrow joint clearance, pulling the liquid filler into the gap and along the interfaces. As it fills and then cools, a solid metallurgical bond forms where the filler meets the base metals. While wetting and adhesion help the filler spread, and diffusion occurs at the interface to strengthen the bond, the essential mechanism that creates the joint is the capillary flow of the molten filler. Oxidation would hinder wetting and thus prevent capillary action.

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