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US 11,591,684 B2Granted
Nickel-cobalt material and method of forming
AssigneeUnison Industries, LLC
InventorsGordon Tajiri, Emily Marie Phelps, Bruce Patrick Graham, Joseph Richard Schmitt, Dattu G V Jonnalagadda, Lakshmi Krishnan
Life of this patent
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Abstract
A nickel-cobalt material and component includes a thermally stabilized nickel-cobalt alloy. The nickel-cobalt alloy disclosed herein includes nanocrystalline grain structures, pinning, such as Zener pinning, and intragranular twinning. The nickel-cobalt alloy disclosed herein exhibits multiple properties including an improved fracture toughness, an increased thermal stability, and an improved ultimate tensile strength.
Claims10
A nickel-cobalt material, comprising:
- a nanocrystalline grain structure with a grain size distribution of about 50 nanometers to about 110 nanometers, the nanocrystalline grain structure comprising phosphorous precipitates at nanocrystalline grain boundaries and intragranular twinning, the material having a chemical makeup comprising from about 25% to about 40% by atomic weight cobalt, from about 1,000 ppm to about 3,500 ppm by atomic weight of phosphorous or boron, and nickel.
A component, comprising:
- a body wherein at least a portion thereof includes a thermally stabilized nickel-cobalt alloy with nanocrystalline grain structures, pinning and intragranular twinning that exhibits fracture toughness of about 10 MPa·m1/2 to 70 MPa·m1/2, an increased thermal stability with an onset temperature of about 50% or 60% of the melting temperature for the alloy, and an ultimate tensile strength of from about 1,000 MPa to about 1,500 MPa,
- wherein the nickel-cobalt alloy includes a chemical makeup comprising from about 30% to about 35% by atomic weight cobalt, from about 1,000 ppm to about 1,500 ppm by atomic weight of phosphorous or boron, and nickel as the balance of the material.
A component, comprising:
- a body wherein at least a portion thereof includes a thermally stabilized nickel-cobalt alloy with nanocrystalline grain structures, pinning and intragranular twinning that exhibits fracture toughness of about 10 MPa·m1/2 to 70 MPa·m1/2, an increased thermal stability with an onset temperature of about 50% or 60% of the melting temperature for the alloy, and an ultimate tensile strength of from about 1,000 MPa to about 1,500 MPa,
- wherein the pinning comprises phosphorous precipitates at boundaries between the nanocrystalline grain structures.
Dependencies are inferred from the claim text.