Document Type

Patent

Publication Date

8-31-1993

Abstract

An isotropic permanent magnet is made by mixing a thermally responsive, low viscosity binder and atomized rare earth-transition metal (e.g., iron) alloy powder having a carbon-bearing (e.g., graphite) layer thereon that facilitates wetting and bonding of the powder particles by the binder. Prior to mixing with the binder, the atomized alloy powder may be sized or classified to provide a particular particle size fraction having a grain size within a given relatively narrow range. A selected particle size fraction is mixed with the binder and the mixture is molded to a desired complex magnet shape. A molded isotropic permanent magnet is thereby formed. A sintered isotropic permanent magnet can be formed by removing the binder from the molded mixture and thereafter sintering to full density.

Patent Number

US 5,240,513

ISURF Reference Number

1337

Assignee

Iowa State University Research Foundation, Inc.,

Application Number

US 07/593,943

Date Filed

10-9-1990

Language

en

File Format

application/pdf

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