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Joining of parts via magnetic heating of metal aluminum powders

United States Patent

May 21, 2013
View the Complete Patent at the US Patent & Trademark Office
A method of joining at least two parts includes steps of dispersing a joining material comprising a multi-phase magnetic metal-aluminum powder at an interface between the at least two parts to be joined and applying an alternating magnetic field (AMF). The AMF has a magnetic field strength and frequency suitable for inducing magnetic hysteresis losses in the metal-aluminum powder and is applied for a period that raises temperature of the metal-aluminum powder to an exothermic transformation temperature. At the exothermic transformation temperature, the metal-aluminum powder melts and resolidifies as a metal aluminide solid having a non-magnetic configuration.
Baker; Ian (Etna, NH)
The Trustees of Dartmouth College (Hanover, NH)
13/ 465,710
May 7, 2012
GOVERNMENT INTERESTS This invention was made with government support under DMR-0905229 awarded by the U.S. National Science Foundation (NSF); under DE-FG02-07ER46392 awarded by the Office of Basic Energy Science, U.S. Department of Energy (DOE); and under Contract No. 60NANB2D0120 awarded by the National Institute of Standards and Technology (NIST). The government has certain rights in the invention.