Abstract: A dispersion-strengthened copper alloy is disclosed having an exceptional combination of strength, ductility, and thermal conductivity. The copper alloy comprises: copper, 0.01 to 2.0 weight % boron and 0.1 to 6.0 weight % cobalt, and cobalt-boride disperoids that range in size between 0.025 and 0.25 microns in diameter. A copper alloy is made by rapid solidification of the melt into a powder. Strong, thermally conductive articles can be made by compacting the powder at temperatures below the melting temperature of the copper alloy, and optionally warm working, cold working, and annealing.

Abstract: A dispersion-strengthened copper alloy is disclosed having an exceptional combination of strength, ductility, and thermal conductivity. The copper alloy comprises: copper, 0.01 to 2.0 weight % boron and 0.1 to 6.0 weight % cobalt, and cobalt-boride disperoids that range in size between 0.025 and 0.25 microns in diameter. A copper alloy is made by rapid solidification of the melt into a powder. Strong, thermally conductive articles can be made by compacting the powder at temperatures below the melting temperature of the copper alloy.

Abstract: A rebar coupler for connecting reinforcing rods in end-to-end relation including a pair of hollow steel split pipe members having nuts welded thereto. The split pipe members are mounted on the ends of the reinforcing rods and bolted together. The split pipe members are annealed such that when bolted together the deformations on the outer surfaces of the rods embed themselves within the split pipe members to provide a very strong connection.