Abstract: Powder metallurgy technology is used to form metallic composites with a uniform distribution of nano-meter size particles within the metallic grains. The uniform distribution of the nano-meter particles is achieved by attaching the nano-meter particles to micron sized particles with surface properties capable of attracting the smaller particles, then blending the decorated particles with micron size metal powder. The blended powder is then powder metallurgy processed into billets that are metal-worked to complete the incorporation and uniform distribution of the nano-meter particles into the metallic composite.

Abstract: High strength aluminum alloys and methods for producing them. The alloys consist essentially of about 9.0 to 10.3 wt. % zinc, about 2.5 to 3.5 wt. % magnesium, about 1.5 to 3.0 wt. % copper and less than about 0.05 wt. % of any other alloying constituent. The balance consists of aluminum. These alloys are compatible with ceramic reinforcements used in metal matrix composites.