Patent ID: 8784728

Claim:
A method for making a high strength copper alloy comprising: co-milling in liquid nitrogen a first mass of copper powder and a second mass of a metal powder, the metal powder comprised of a second metal that is soluble in copper and that forms stable nitrides under cryogenic milling conditions in the presence of said liquid nitrogen to form a co-milled mass of powder comprising said nitrides, said first mass of copper powder being from about 91 to about 97 wt %, said co-milled mass of powder of powder being free of Be, said stable nitrides formed during said co-milling in the presence of said liquid nitrogen; degassing said co-milled mass of powder; subjecting the co-milled mass of powder to heat and pressure; and consolidating the co-milled mass into a billet comprising an alloy of copper comprising the metal soluble in copper.