Method of making permanent magnets
Patent
·
OSTI ID:868909
- Ames, IA
A method for making an isotropic permanent magnet comprises atomizing a melt of a rare earth-transition metal alloy (e.g., an Nd--Fe--B alloy enriched in Nd and B) under conditions to produce protectively coated, rapidly solidified, generally spherical alloy particles wherein a majority of the particles are produced/size classified within a given size fraction (e.g., 5 to 40 microns diameter) exhibiting optimum as-atomized magnetic properties and subjecting the particles to concurrent elevated temperature and elevated isotropic pressure for a time effective to yield a densified, magnetically isotropic magnet compact having enhanced magnetic properties and mechanical properties.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Number(s):
- US 5242508
- Application Number:
- 07/869,897
- OSTI ID:
- 868909
- Country of Publication:
- United States
- Language:
- English
New material for permanent magnets on a base of Nd and Fe (invited)
|
journal | March 1984 |
Permanent magnet materials based on the rare earth-iron-boron tetragonal compounds
|
journal | September 1984 |
Hot‐pressed neodymium‐iron‐boron magnets
|
journal | April 1985 |
Processing of Neodymium-Iron-Boron melt-spun ribbons to fully dense magnets
|
journal | September 1985 |
Iron‐based rare‐earth magnets (invited)
|
journal | April 1985 |
Low oxygen processing of SmCo5 magnets
|
journal | March 1981 |
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Related Subjects
method
permanent
magnets
isotropic
magnet
comprises
atomizing
melt
rare
earth-transition
metal
alloy
nd-fe-b
enriched
conditions
produce
protectively
coated
rapidly
solidified
spherical
particles
majority
produced
size
classified
fraction
40
microns
diameter
exhibiting
optimum
as-atomized
magnetic
properties
subjecting
concurrent
elevated
temperature
pressure
time
effective
yield
densified
magnetically
compact
enhanced
mechanical
size fraction
isotropic permanent
permanent magnet
elevated temperature
transition metal
rare earth
permanent magnets
metal alloy
mechanical properties
time effective
alloy particles
earth-transition metal
rare earth-transition
magnetic properties
spherical alloy
rapidly solidified
enhanced magnetic
alloy particle
magnet comprises
/148/75/
permanent
magnets
isotropic
magnet
comprises
atomizing
melt
rare
earth-transition
metal
alloy
nd-fe-b
enriched
conditions
produce
protectively
coated
rapidly
solidified
spherical
particles
majority
produced
size
classified
fraction
40
microns
diameter
exhibiting
optimum
as-atomized
magnetic
properties
subjecting
concurrent
elevated
temperature
pressure
time
effective
yield
densified
magnetically
compact
enhanced
mechanical
size fraction
isotropic permanent
permanent magnet
elevated temperature
transition metal
rare earth
permanent magnets
metal alloy
mechanical properties
time effective
alloy particles
earth-transition metal
rare earth-transition
magnetic properties
spherical alloy
rapidly solidified
enhanced magnetic
alloy particle
magnet comprises
/148/75/