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AssigneePurdue Research Foundation
InventorsSrinivasan Chandrasekar, Walter D. Compton, Thomas N. Farris, Kevin P. Trumble
Estimating the term…
A product in which at least a portion of the product has a nanocrystalline microstructure, and a method of forming the product. The method generally entails machining a body in a manner that produces chips consisting entirely of nano-crystals as a result of the machining operation imposing a sufficiently large strain deformation. The body can be formed of a variety of materials, including metal, metal alloy and ceramic materials. Furthermore, the body may have a microstructure that is essentially free of nano-crystals, and may even have a single-crystal microstructure. The chips produced by the machining operation may be in the form of particulates, ribbons, wires, filaments and/or platelets. The chips are then used to form the product. According to one aspect of the invention, the chips are consolidated to form the product, such that the product is a monolithic material that may contain nano-crystals. According to another aspect of the invention, the chips are dispersed in a matrix material, such that the product is a composite material in which the chips serve as a reinforcement material.
A product consisting essentially of polycrystalline chips and optionally a matrix in which the chips are dispersed, the polycrystalline chips having nanocrystalline microstructures and being formed of a material chosen from the group consisting of metals, metal alloys, intermetallic materials, and ceramic materials, the matrix if present being formed of a material chosen from the group consisting of metal, metal alloy, intermetallic materials, polymeric materials, and ceramic materials;
A product consisting essentially of polycrystalline chips produced by a machining operation so as to be characterized primarily by plane strain deformation and in the form of particulates, ribbons, wires, filaments, and/or platelets, held together by consolidation and sintering, the chips having nanocrystalline microstructures consisting entirely of grains with a nominal size of about 30 to less than 500 nm so that the product consists essentially of a nanocrystalline microstructure, the chips being formed of a material chosen from the group consisting of metals, metal alloys, intermetallic materials, and ceramic materials.
A product comprising polycrystalline chips dispersed in a matrix, the chips being produced by a machining operation so as to be characterized primarily by plane strain deformation and in the form of particulates, ribbons, wires, filaments and/or platelets that consist entirely of grains with a nominal size of about 30 to less than 500 nm, the chips being formed of a material chosen from the group consisting of metals, metal alloys, intermetallic materials, and ceramic materials, the matrix being formed of a material chosen from the group consisting of metal, metal alloy, intermetallic materials, polymeric materials, and ceramic materials.
Dependencies are inferred from the claim text.