Additive manufacturing of joining preforms

A method of fabricating a joining preform, the method comprising:

• printing a non-phosphorous joining alloy;
• printing a self-fluxing joining alloy on the non-phosphorous joining alloy, the self-fluxing joining alloy containing at least one of phosphorus, boron, fluorine, chlorine, or potassium;
• and
• wherein both printing steps are performed by an additive manufacturing process.

A method of fabricating a brazing preform, the method comprising:

• printing a self-fluxing braze alloy, the self-fluxing braze alloy containing phosphorus, the self-fluxing braze alloy is at least one of a BCuP alloy, a CuP alloy, a CuSnP alloy, a CuSnNiP alloy or a CuAgP alloy;
• printing a non-phosphorous braze alloy, the non-phosphorous braze alloy is a BAg alloy;
• repeating the printing a self-fluxing braze alloy step until the non-phosphorous braze alloy is substantially encapsulated by the self-fluxing braze alloy;
• and
• wherein both printing steps are performed by an additive manufacturing process, and the brazing preform is formed into at least one of a cylinder, a disc, a sheet or a washer.