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.
Claims36
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 complex boride particles are predominantly located at the junctions of at least three grains of said ultrafine grain solid solution phase.
Alloy compositions according to claim 11 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 average particle size, measured in its longest dimension, of less than about 0.5 micron, as viewed on a microphotograph of an electron microscope.
Alloys according to claim 12 containing from about 1 to about 15 atom percent of one or more of a refractory metal selected from the group consisting of Mo,W,Mb and Ta.
Iron-based, boron and carbon-containing transition metal alloys, 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 complex boride particles are predominantly located at the junctions of at least three grains of said ultrafine grain solid solution phase, and wherein said ultrafine grains of said solid solution phase in turn are interspersed with carbide particles.
Dependencies are inferred from the claim text.