Patent ID: 7775416
Filing Date: 2010-08-17
Classification: B23K

Abstract:
1. A brazing process comprising: selecting a substrate and a mass of metallic powder particles on the basis of the substrate being sufficiently large to reflect microwave radiation at a power level and frequency level and at least some of the metallic powder particles having a maximum particle size of less than 100 nanometers to cause selective coupling of the metallic powder particles with the microwave radiation at the power and frequency levels when the metallic powder particles and the substrate are simultaneously subjected to the microwave radiation at the power and frequency levels, wherein the metallic powder particles have a higher melting temperature than the substrate; applying the mass of metallic powder particles to a surface of the substrate; subjecting the mass to the microwave radiation at the power and frequency levels so that the substrate reflects the microwave radiation and the metallic powder particles within the mass couple with the microwave radiation and sufficiently melt to metallurgically bond to the substrate; and then interrupting the microwave radiation and allowing the mass to cool, solidify, and form a solid brazement.