Rare earth-iron-boron permanent magnets containing aluminum

Patent · Tue Sep 04 04:00:00 EDT 1990

OSTI ID:6341682

Ghandehari, M H

This patent describes a method of preparing a rare earth-iron-boron permanent magnet containing aluminum and added rare earth oxide. It comprises: mixing a particulate alloy, containing at least one rare earth metal, iron, and boron, with particulate aluminum and about 0.5 to about 10 weight percent of particulate rare earth oxide, calculated by weight of the particulate alloy; aligning magnetic domains of the mixture in a magnetic field; compacting the aligned mixture to form a shape; and sintering the compacted shape. The permanent magnet comprises a rare earth metal, iron, boron, added rare earth oxide and about 0.05 to about 1.0 percent by weight of aluminum.

• Assignee: Union Oil Co. of California, Los Angeles, CA (USA)
• Patent Number(s): US 4954186; A
• Application Number: PPN: US s 7-177094
• OSTI ID: 6341682
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALUMINIUM COMPOUNDS
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
FABRICATION
IRON COMPOUNDS
MAGNETIZATION
MAGNETS
OXIDES
OXYGEN COMPOUNDS
PERMANENT MAGNETS
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS