Complex boride particle containing alloys
AssigneeAllied Corporation
InventorRanjan Ray
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Abstract
Boron-containing transition metal alloys based on one or more of iron, cobalt and nickel, and containing at least two metal components, are characterized by being composed of ultrafine grains of a primary solid-solution phase randomly interspersed with particles of complex borides which are predominantly located at the junctions of at least three grains of the primary solid-solution phase. These alloys are obtained by devitrification of the solid, amorphous state under specific heat-treatment conditions. These alloys can be consolidated into three-dimensional bodies.
Claims33
Boron-containing transition metal alloys, based on one or more of iron, cobalt and nickel, containing at least two metal components, said alloys being composed of ultrafine grains of a primary solid solution phase randomly interspersed with particles of complex borides, wherein said ultrafine grains of the primary solid solution phase have an average diameter, measured in its longest dimension, of less than about 3 micrometers, and wherein said complex boride particles have an average particle size, measured in its largest dimension, of less than about 1 micrometer, as viewed on a microphotograph of an electron microscope.
Boron-containing transition metal alloys, based on one or more of iron, cobalt and nickel, containing at least two metal components, said alloys being composed of ultrafine grains of a primary solid solution phase randomly interspersed with particles of complex borides, wherein said ultrafine grains of the primary solid solution phase have an average diameter, measured in its longest dimension, of less than about 1 micron, and wherein said complex boride particles have an average particle size, measured in its largest dimension, of less than about 0.5 micron, as viewed on a microphotograph of an electron microscope.
Alloy bodies according to claim 31 having a thickness of at least 0.2 millimeter, measured in the shortest dimension.
Alloy compositions according to clam 19 having the formula
- Ni.sub.30-80 Cr.sub.0-45 (Fe,Co).sub.0-25 (Mo,W).sub.0-10 B.sub.5-12
- wherein the sum of Cr, Fe, Co, Mo and W is at least 10 atom percent.
Dependencies are inferred from the claim text.