NdFeB Magnets made of VACODYM

Rare-Earth Permanent Magnets for Highest Energy Density Requirements

Neodymium-Iron-Boron magnets made of VACODYM® have the highest energy density available today. VACODYM alloys are anisotropic material grades.

Benefits:

  • Up to ten times higher energy densities in comparison to ferrites
  • Existing magnet systems can be improved
  • New design principles are realized and new fields of application are opened
  • New alloy classes can be used for working temperatures above 200 °C (depending on coercivity) and working point
  • Linear and servo motors
  • Aircraft application with high energy density
  • Elevator motors
  • Automotive applications (e.g. electric power steering, sensors, etc.)
  • Scientific applications (wigglers, beam guiding systems and undulators)
  • Aviation

Magnets out of VACODYM are produced by sintering using powder metallurgical processes. The excellent magnetic properties of VACODYM are traced to the strongly magnetic matrix phase Nd2Fe14B with very high saturation polarization and high magnetic anisotropy. A ductile neodymium-rich bonding phase at the grain boundaries gives these magnets good magnetical properties.

Depending on form, quantities, dimensions, tolerances and magnetic properties the magnets are produced out of bigger (isostatically) pressed blocks or die-pressed.

The magnetic properties are influenced by the alloy composition and the pressing. Different positions for back pat method. Three different processes are possbile which are reflected in the alloy name with the letters HR, TP or AP. HR (High Remanence) refers to isostatically pressed magnets. In die-pressed design we differentiate between TP (Transverse-Pressed) and AP (Axial-Pressed)

When die-pressing, the powder particles are aligned by strong magnetic fields parallel (axial field for AP-grades) or perpendicular (transverse fields for TP-grades) to the direction of pressing depending on the geometry of the part. Isostatically or transverse-field pressed parts have an about 5 to 8 % higher remanence compared to axial-field pressed magnets. 

With the established grain boundary diffusion process the coercivity of such magnets can be increased up to a maximum of 600 kA/m (depending from the thickness of the permanent magnet).

  • Linear and servo motors
  • Aircraft application with high energy density
  • Elevator motors
  • Automotive applications (e.g. electric power steering, sensors, etc.)
  • Scientific applications (wigglers, beam guiding systems and undulators)
  • Aviation

Magnets out of VACODYM are produced by sintering using powder metallurgical processes. The excellent magnetic properties of VACODYM are traced to the strongly magnetic matrix phase Nd2Fe14B with very high saturation polarization and high magnetic anisotropy. A ductile neodymium-rich bonding phase at the grain boundaries gives these magnets good magnetical properties.

Depending on form, quantities, dimensions, tolerances and magnetic properties the magnets are produced out of bigger (isostatically) pressed blocks or die-pressed.

The magnetic properties are influenced by the alloy composition and the pressing. Different positions for back pat method. Three different processes are possbile which are reflected in the alloy name with the letters HR, TP or AP. HR (High Remanence) refers to isostatically pressed magnets. In die-pressed design we differentiate between TP (Transverse-Pressed) and AP (Axial-Pressed)

When die-pressing, the powder particles are aligned by strong magnetic fields parallel (axial field for AP-grades) or perpendicular (transverse fields for TP-grades) to the direction of pressing depending on the geometry of the part. Isostatically or transverse-field pressed parts have an about 5 to 8 % higher remanence compared to axial-field pressed magnets. 

With the established grain boundary diffusion process the coercivity of such magnets can be increased up to a maximum of 600 kA/m (depending from the thickness of the permanent magnet).

Our VACODYM Alloys made of Neodymium-Iron-Boron

Btyp. [T]:  1.08 - 1.47  T
Br min. [T]:  1.03 - 1.42  T
HcB typ. [kA/m]:  830 - 1116  kA/m
HcB min. [kA/m]:  770 - 1065  kA/m
HcJ min. [kA/m]:  875 - 3143  kA/m
(BH) typ. [kJH/m3]:  225 - 415  kJ/m³
(BH) min. [kJH/m3]:  200 - 380  kJ/m³
Product Download Br typ.
[T]
Br min.
[T]
HcB typ.
[kA/m]
HcB min.
[kA/m]
HcJ min.
[kA/m]
(BH)max typ.
kJ/m3
BH)max min.
kJ/m3
TK(Br
RT-100°C)
[%/°C]
TK(HcJ
RT-100°C)
[%/°C]
TK(Br
RT-150°C)
[%/°C]
TK(HcJ
RT-150°C)
[%/°C]
VACODYM 633 HR1.351.2910409801275350315-0.095-0.65-0.105-0.55
VACODYM 655 HR1.281.229909251670315280-0.09-0.61-0.1-0.55
VACODYM 677 HR1.181.129158502230270240-0.085-0.55-0.095-0.5
VACODYM 722 HR1.471.42915835875415380-0.115-0.7700
VACODYM 745 HR1.441.4111510651115400370-0.115-0.7300
VACODYM 238 TP1.371.33105810081273363335-0.111-0.679-0.12-0.573
VACODYM 247 TP1.361.32105110001432357330-0.111-0.654-0.12-0.563
VACODYM 633 TP1.321.2810209701275335305-0.095-0.65-0.105-0.57
VACODYM 655 TP1.261.229709251670305280-0.09-0.61-0.1-0.55
VACODYM 669 TP1.221.179408752000290255-0.085-0.57-0.095-0.51
VACODYM 677 TP1.181.139158602230270240-0.085-0.55-0.095-0.5
VACODYM 688 TP1.141.098858302625250225-0.08-0.51-0.09-0.46
VACODYM 745 TP1.411.37109010351115385355-0.115-0.7300
VACODYM 764 TP1.371.33106010051275360335-0.115-0.7-0.125-0.59
VACODYM 776 TP1.321.2810209701670335310-0.11-0.61-0.12-0.55
VACODYM 837 TP1.371.33106010101275360335-0.11-0.62-0.12-0.54
VACODYM 854 TP1.321.2810209701670335310-0.105-0.6-0.115-0.53
VACODYM 863 TP1.291.259959502000315295-0.1-0.56-0.11-0.51
VACODYM 872 TP1.251.219659152230300280-0.095-0.53-0.105-0.49
VACODYM 881 TP1.221.189459002385290265-0.093-0.51-0.103-0.47
VACODYM 890 TP1.191.159158652625270250-0.09-0.5-0.1-0.46
VACODYM 956 TP1.351.3210309951670350330-0.1-0.573-0.108-0.531
VACODYM 965 TP1.311.2810009651870330310-0.096-0.531-0.104-0.498
VACODYM 974 TP1.281.259809452070315295-0.094-0.496-0.102-0.467
VACODYM 983 TP1.251.229609252230300280-0.091-0.473-0.099-0.445
VACODYM 992 TP1.221.199409002385285270-0.088-0.453-0.097-0.431
VACODYM 238 AP1.31.269959461353323298-0.111-0.667-0.12-0.568
VACODYM 247 AP1.291.259879381512318293-0.111-0.642-0.12-0.557
VACODYM 633 AP1.261.229659151355305280-0.095-0.64-0.105-0.57
VACODYM 655 AP1.21.169158651670275255-0.09-0.61-0.1-0.55
VACODYM 669 AP1.161.128858202000255225-0.085-0.57-0.095-0.51
VACODYM 677 AP1.131.088608052230240215-0.085-0.55-0.095-0.5
VACODYM 688 AP1.081.038307702625225200-0.08-0.51-0.09-0.46
VACODYM 745 AP1.341.3110259701115340325-0.115-0.7300
VACODYM 764 AP1.31.279959551355325305-0.115-0.69-0.125-0.58
VACODYM 776 AP1.261.229659151670305280-0.11-0.61-0.12-0.55
VACODYM 837 AP1.31.269959501355325300-0.11-0.62-0.12-0.54
VACODYM 854 AP1.261.219659051670305275-0.105-0.6-0.115-0.53
VACODYM 863 AP1.211.179258752000280250-0.1-0.56-0.11-0.51
VACODYM 872 AP1.171.138908452230260235-0.095-0.53-0.105-0.49
VACODYM 881 AP1.141.18758302385250230-0.093-0.51-0.103-0.47
VACODYM 890 AP1.111.078457952625235210-0.09-0.5-0.1-0.46
VACODYM 956 AP1.291.269759401670315295-0.1-0.573-0.108-0.531
VACODYM 965 AP1.251.229459101870295280-0.096-0.531-0.104-0.498
VACODYM 974 AP1.221.199258902070280265-0.094-0.496-0.102-0.467
VACODYM 983 AP1.191.169058702230270250-0.091-0.473-0.099-0.445
VACODYM 992 AP1.161.138858502385255240-0.088-0.453-0.097-0.43
VACODYM 837 DTP1.3651.3210449951790356328-0.11-0.577-0.12-0.515
VACODYM 863 DTP1.2851.249899402507318292-0.1-0.507-0.11-0.47
VACODYM 872 DTP1.2451.29609122745299274-0.095-0.484-0.105-0.454
VACODYM 881 DTP1.2151.179388902905285260-0.093-0.468-0.103-0.444
VACODYM 890 DTP1.1851.149178693143272248-0.09-0.445-0.1-0.429
VACODYM 956 DTP1.3451.3110329912188347324-0.1-0.481-0.108-0.454
VACODYM 965 DTP1.3051.2710039622387327305-0.096-0.448-0.104-0.426
VACODYM 974 DTP1.2751.249829412586313292-0.094-0.415-0.102-0.398
VACODYM 983 DTP1.2451.219609202745299278-0.091-0.388-0.099-0.375
VACODYM 992 DTP1.2151.189388982905285265-0.088-0.361-0.097-0.352
VACODYM 722 DHR1.4651.41111610591393409373-0.115-0.671-0.125-0.591
VACODYM 745 DHR1.4351.39109610461631393364-0.115-0.626-0.125-0.546

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