Global to push GA events into
skip to main content

Title: Method of making bonded or sintered permanent magnets

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. 14 figs.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
131933
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States) PTO; SCA: 420200; 360101; PA: EDB-95:157275; SN: 95001489038
Patent Number(s):
US 5,470,401/A/
Application Number:
PAN: 8-097,442
Contract Number:
W-7405-ENG-82
Resource Relation:
Other Information: PBD: 28 Nov 1995
Research Org:
Iowa State University
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 36 MATERIALS SCIENCE; PERMANENT MAGNETS; FABRICATION; RARE EARTH ALLOYS; TRANSITION ELEMENT ALLOYS; BINDERS; MOLDING

Similar records in DOepatents and OSTI.GOV collections: