Since the development of fiber reinforced metal matrix systems in the early 1960's, boron/aluminum composites have been under constant investigation to determine physical and mechanical properties. The composite's high unidirectional strength-to-density ratio makes it a potentially valuable structural material, and considerable progress in the development of this composite, notably in the commercial production of the boron fiber reinforced aluminum has been made. Boron/aluminum composites are now said to be cost effective in certain types of aerospace application, e.g., gas turbine engines, aircraft structure and space vehicles. [1-5]

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