Method for preparing rare earth-iron-boron permanent magnets

Patent · Tue Nov 07 04:00:00 EST 1989

OSTI ID:7035730

Ghandehari, M H

This patent describes a method for producing a permanent magnet. It comprises: mixing together the components; a particulate alloy consisting essentially of neodymium, iron, and boron; particulate aluminum; and a particulate rare earth oxide selected from the group consisting of gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, and mixtures thereof; aligning magnetic domains of the mixture in a magnetic field; compacting the aligned mixture to form a shape; sintering the compacted shape; and annealing the sintered shape.

• Assignee: Union Oil Co. of California, Los Angeles, CA
• Patent Number(s): US 4878958; A
• Application Number: PPN: US 7-177056A
• OSTI ID: 7035730
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALLOYS
ALUMINIUM
BORON ALLOYS
CHALCOGENIDES
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELEMENTS
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
IRON ALLOYS
MAGNETIZATION
MAGNETS
METALS
NEODYMIUM
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PERMANENT MAGNETS
PRODUCTION
RARE EARTH COMPOUNDS
RARE EARTHS
TERBIUM COMPOUNDS
TERBIUM OXIDES