Process for reinforcing aluminum alloy
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul Gordon Riewald, William Henry Krueger, Ashok Kumar Dhingra
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Abstract
A composite reinforced with polycrystalline alumina fibers in a matrix of an aluminum alloy containing 0.5-5.5% by weight of the matrix of lithium is prepared by infiltrating alumina fibers with a molten alloy containing aluminum and 1-8% by weight of lithium for a time sufficient to form a reaction sheath on the fibers of a thickness less than about 15% of the total fiber diameter.
Claims11
A process comprising the steps of placing polycrystalline alumina fibers in a mold, forming a composite reinforced with 10-80 volume percent of said fibers and having a porosity of less than about 10% by infiltrating the fibers in the mold with a molten aluminum alloy containing about 1-8% by weight of lithium for a time sufficient to form a reaction sheath on the fibers which has a thickness of less than 15% of the total fiber diameter and cooling the composite.
Dependencies are inferred from the claim text.