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US 9,757,796 B2Granted
Manufacture of controlled rate dissolving materials
AssigneeTerves, LLC
InventorsAndrew Sherman, Brian Doud, Nicholas Farkas
Life of this patent
Estimating the term…
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AssigneeTerves, LLC
InventorsAndrew Sherman, Brian Doud, Nicholas Farkas
Estimating the term…
A castable, moldable, or extrudable structure using a metallic base metal or base metal alloy. One or more insoluble additives are added to the metallic base metal or base metal alloy so that the grain boundaries of the castable, moldable, or extrudable structure includes a composition and morphology to achieve a specific galvanic corrosion rates partially or throughout the structure or along the grain boundaries of the structure. The insoluble additives can be used to enhance the mechanical properties of the structure, such as ductility and/or tensile strength. The insoluble particles generally have a submicron particle size. The final structure can be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final structure as compared to the non-enhanced structure.
A metal cast structure that includes a base metal material and a plurality of insoluble particles disbursed in said metal cast structure to obtain a desired dissolution rate of said metal cast structure, said insoluble particles having a melting point that is greater than a melting point of said base metal material, said insoluble particles have a solubility of less than about 5% in said base metal material, said insoluble particles have a size that is less than about 1 μm, said insoluble particles constitute about 0.1-40 wt % of said metal cast structure, at least 50% of said insoluble particles located in grain boundary layers of said metal cast structure, said insoluble particles selected and used in a quantity to obtain a composition and morphology of said grain boundary layers to obtain a galvanic corrosion rate along said grain boundary layers, said insoluble particles have a different galvanic potential from said base metal material, said base metal material includes one or more metals selected from the group consisting of magnesium, zinc, titanium, aluminum, and iron, said insoluble particles including one or more materials selected from the group consisting of iron, copper, titanium, zinc, tin, cadmium, lead, nickel, carbon, iron alloy, copper alloy, titanium alloy, zinc alloy, tin alloy, cadmium alloy, lead alloy, and nickel alloy.
A metal cast structure that includes a base metal material and a plurality of insoluble particles disbursed in said metal cast structure to obtain a desired dissolution rate of said metal cast structure, said insoluble particles having a melting point that is greater than a melting point of said base metal material, said insoluble particles constitute about 0.1-40 wt % of said metal cast structure, said insoluble particles having a melting point of greater than 700° C., said base metal material including a majority weight percent magnesium, at least 50% of said insoluble particles located in grain boundary layers of said metal cast structure, said insoluble particles are selected and used in a quantity to obtain a composition and morphology of said grain boundary layers to obtain a galvanic corrosion rate along said grain boundary layers, said insoluble particles have a different galvanic potential from said base metal material, said insoluble particles having a melting point of greater than 700° C.
Dependencies are inferred from the claim text.