Fiber Composite Alloys: Preparation by Controlled Dissociation of Metallic Solid Solutions

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Abstract
Fiber-reinforced alloys have been prepared by the controlled dissociation of gold-nickel and aluminum-zinc solid solutions. To cause the dissociation, the alloys were taken from a one-phase field to a two-phase field by lowering the temperature. The new two-phase structure was in each case formed by diffusion controlled processes, and under certain conditions one of the new equilibrium phases appeared in the form of fibers, a few tenths of a micron in diameter, embedded in a matrix of the other. The precipitated phase first appeared in the form of spherical particles, but these aligned and then coalesced to form the fibers.