Method for making rare earth-containing magnets

Patent · Tue Oct 11 00:00:00 EDT 1988

OSTI ID:6619765

Ghandehari, M H

This patent describes a method for producing rare earth-ferromagnetic metal alloy permanent magnets, comprising the steps of: (a) mixing a particulate additive material selected from the group consisting of refractory oxides, carbides, and nitrides, in an amount which provides about 0.1 percent to about 2 percent by weight additive material in the mixture, with a major amount of a particulate rare earth-ferromagnetic metal alloy and a minor amount of a particulate sintering aid alloy; (b) aligning magnetic domains of the mixture in a magnetic field; (c) compacting the aligned mixture to form a shape; and (d) sintering the compacted shape.

• Assignee: Union Oil Co. of California, Los Angeles, CA
• Patent Number(s): US 4776902
• OSTI ID: 6619765
• Resource Relation: Patent File Date: Filed date 28 Apr 1986
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
FERROMAGNETIC MATERIALS
FABRICATION
PERMANENT MAGNETS
RARE EARTH ALLOYS
ADDITIVES
CARBIDES
CHEMICAL PREPARATION
MAGNETIC FIELDS
NITRIDES
OXIDES
REFRACTORIES
SINTERING
ALLOYS
CARBON COMPOUNDS
CHALCOGENIDES
MAGNETIC MATERIALS
MAGNETS
MATERIALS
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PNICTIDES
SYNTHESIS
360101* - Metals & Alloys- Preparation & Fabrication
420800 - Engineering- Electronic Circuits & Devices- (-1989)