At MMM Conference, November 10, 1983 - Prizztech Oy Speaker HEV dr iving motor ˜-50 X˜NEOMAX N...
Transcript of At MMM Conference, November 10, 1983 - Prizztech Oy Speaker HEV dr iving motor ˜-50 X˜NEOMAX N...
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Maximum Energy Products (MGOe)
Maximum Energy Products (kJ/m)
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Guiding principles which led to the new magnets:
Transition
Old New
Guiding principle
Alnico SmCo5Getting high coercivity by using high anisotropy fields originated from 4f electrons
SmCo5 Sm2Co17Getting high remanence by using high saturation magnetization of Sm2Co17
Sm2Co17 Nd2Fe14BGetting an Fe-base magnet by extending the search for R-Fe-X ternary systems with various R
(R=Rare Earth)
MRI, Speaker
HEV driving motor
�-50
X�NEOMAXNNEOREC
Compressor motor
Motor for robotics
Generator
HDD, CD, DVD, MD, VTR, Digital camera, Head phone
ABS sensor
OA�FA motor
Servo motor
�-46BH
�-49H
�-40BH
�-39SH
�-38AH
�-35SH�-35EH
�-32EH
�-48
30
40
45
50
35
10 20 30
HcJ�kOe�
�BH)max�MGOe�
Map of the magnetic properties of the NdFeB sinteredmagnets and corresponding applications
MRI, Speaker
HEV driving motor
�-50
Compressor motor
Motor for robotics
Generator
HDD, CD, DVD, MD, VTR, Digital camera, Head phone
ABS sensor
OA�FA motor
Servo motor
�-46BH
�-44H
�-42VH
�-39SH
�-38VH
�-35SH�-35EH
�-32EH
�-48BH
2000�
30
40
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50
35
10 20 30
HcJ�kOe�
�BH)max�MGOe�
Map of the magnetic properties of the NdFeB sinteredmagnets and corresponding applications
�1987
Raw Materials Melting Course
GrindingJet
Milling Compaction Sintering Annealing
Nd, Dy, Fe, B
Process for the NdFeB sintered magnets
High magneticfield
Raw Materials Melting Course
GrindingJet
Milling Compaction Sintering Annealing
Nd, Dy, Fe, B
Process for the NdFeB sintered magnets
Improvements: StripCasting
HydrogenDecrepitation
Lubricant
Binder
Low pressurepressing
Low oxygenprocess
MRI, Speaker
HEV driving motor
�-50
X�NEOMAXNNEOREC
Compressor motor
Motor for robotics
Generator
HDD, CD, DVD, MD, VTR, Digital camera, Head phone
ABS sensor
OA�FA motor
Servo motor
�-46BH
�-44H
�-42VH
�-39SH
�-38VH
�-35SH�-35EH
�-32EH
�-48BH
30
40
45
50
35
10 20 30
HcJ�kOe�
�BH)max�MGOe�
Map of the magnetic properties of the NdFeB sinteredmagnets and corresponding applications
Application of NdFeB sintered magnets(Pick-up for CD-ROM)
Tracking coil
Focus coil
NdFeB magnetLense
Optical pick-up
Inside the houseOutside the house
Compressor
IPM rotor
NdFeB magnet
DC motor
Application of NdFeB sintered magnet(IPM compressor motor for air conditioner)
MRI, Speaker
HEV driving motor
�-50
X�NEOMAXNNEOREC
Compressor motor
Motor for robotics
Generator
HDD, CD, DVD, MD, VTR, Digital camera, Head phone
ABS sensor
OA�FA motor
Servo motor
�-46BH
�-44H
�-42VH
�-39SH
�-38VH
�-35SH�-35EH
�-32EH
�-48BH
10 20 30
HcJ�kOe�
30
40
45
50
35�BH)max�MGOe�
Map of the magnetic properties of the NdFeB sinteredmagnets and corresponding applications
Strong needs
21Nd-10Dy-68Fe-1B
31Nd-68Fe-1B
26Nd-5Dy-68Fe-1B
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10 20 30
Nd
Dy�0.1
Nature
Composition of the NdFeB sintered magnets�BH)max�MGOe�
HcJ�kOe�
MRI, Speaker
HEV driving motor
�-50
X�NEOMAXNNEOREC
Compressor motor
Motor for robotics
Generator
HDD, CD, DVD, MD, VTR, Digital camera, Head phone
ABS sensor
OA�FA motor
Servo motor
�-46BH
�-44H
�-42VH
�-39SH
�-38VH
�-35SH�-35EH
�-32EH
�-48BH
30
40
45
50
35
10 20 30
HcJ�kOe�
�BH)max�MGOe�
Map of the magnetic properties of the NdFeB sinteredmagnets and corresponding applications
Hybrid car applicationrequires this range !
�BH)max�MGOe�
30
40
45
50
35
10 20 30
HcJ�kOe�
0% Dy
Direction of our development
Increasing anisotropy
Coercivity of NdFeB sintered magnets (PLP Experimental data)
5μm�13.5kOe
2.9μm�16.5kOe
2.7μm�17kOe
1 32 54 76 10984.53 7.56.0 9.0 15.012.01.5
D�1.5d
25
20
15
10
Particle size d�μm�
H cJ�kOe�
Grain size D�μm�
New National Project in Japan
Subject: “Development of Alternative Materials
for Rare Metals”
Rare Metals: � W for toolings� Dyfor NdFeB magnets�In for LCD
Term: 2007�2011Budget: 5.5BJPY (�34M€�Members for �Dy: �Intermetallics Co., Ltd.
�Tohoku University�National Institute for
Material Science etc.
Coercivity of NdFeB sintered magnets (PLP Experimental data)
5μm�13.5kOe
2.9μm�16.5kOe
2.7μm�17kOe
25
1 32 54 76 10984.53 7.56.0 9.0 15.012.01.5
D �1.5d
20
15
10
Particle size d�μm�
H cJ�kOe�
Grain size D�μm�
How to reach the object ?
�A thorough investigation about the relation between microstructure and coercivity in NdFeBmagnets.
�A thorough investigation about the mechanism of the magnetization reversal, including calculations based on the first principle.
�Determination of the ideal structure for the NdFeBmagnet.
�Determination of the process for the NdFeBmagnet with the ideal structure.
�All motors in all factories →NdFeB PM motors
�All motors for elevators →NdFeB PM motors
�All motors for air conditioners →NdFeB PM motors
�All motors for refrigerators →NdFeB PM motors
�All motors for trains →NdFeB PM motors
To rescue the Earth, let’s act:
�All cars →HEV or EV
Problems ? Let’s overcome !
�Shortage of Nd, Dy ? →Find new mines !
�Cost of NdFeB magnets ? →Find a way for cost
reduction !
�Cost of HEV → Develop HEV with acceptable cost !
(Toyota is doing.)
����
����
e. g.
Is it impossible to find a new magnet
after the NdFeB magnet ?
To find a new magnet after the NdFeB magnet, a
new guiding principle must be found:
The guiding principle for the NdFeB magnet is
useless any more.