NdFeB Magnets made of VACODYM

Rare-Earth Permanent Magnets for Highest Energy Density Requirements. Now also in compliance with DFARS 225.7018, 10 USC. 2533c.

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

Br min. [T]:  1.03 - 1.42  T

Br min. [kG]

:  1.7 - 14.2  kG
H min. [kA/m]:  770 - 1065  kA/m

HcB min. [kOe]

:  10 - 13  kOe

HcJ min. [kA/m]

:  875 - 3143  kA/m

HcJ min. [kOe]

:  11 - 40  kOe

(BH)max typ.  [k/m3]

:  225 - 415  kJ/m³

(BH)max typ. [MGOe]

:  28 - 53  MGOe
Product Download Br min.
[T]
Br min.
[kG]
HcB min.
[kA/m]
HcB min.
[kOe]
HcJ min.
[kA/m]
HcJ min.
[kOe]
(BH)max (typ.)[kJ/m3] (BH) max (typ.)[MGOe] 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 HR1.2912.99801312751635044-0.1-0.65-0.11-0.55
VACODYM 655 HR1.2212.29251216702131540-0.09-0.61-0.1-0.55
VACODYM 677 HR1.1211.28501122302827034-0.09-0.55-0.1-0.5
VACODYM 722 HR1.4214.2835118751141553-0.12-0.77N/AN/A
VACODYM 745 HR1.41410651311151440050-0.12-0.73N/AN/A
VACODYM 238 TP1.3313.310081312731636346-0.11-0.68-0.12-0.57
VACODYM 633 TP1.281.89701212751633542-0.1-0.65-0.11-0.57
VACODYM 655 TP1.2212.29251216702130539-0.09-0.61-0.1-0.55
VACODYM 669 TP1.171.78751120002529036-0.09-0.57-0.1-0.51
VACODYM 677 TP1.1311.38601122302827034-0.09-0.55-0.1-0.5
VACODYM 688 TP1.0910.98301026253325032-0.08-0.51-0.09-0.46
VACODYM 745 TP1.3713.710351311151438548-0.12-0.73N/AN/A
VACODYM 776 TP1.2812.89701216702133542-0.11-0.61-0.12-0.55
VACODYM 837 TP1.3313.310101312751636046-0.11-0.62-0.12-0.54
VACODYM 854 TP1.28N/A9701216702133542-0.11-0.6-0.12-0.53
VACODYM 863 TP1.2512.59501220002531540-0.1-0.56-0.11-0.51
VACODYM 872 TP1.2112.19151222302830038-0.1-0.53-0.11-0.49
VACODYM 881 TP1.1811.89001123853029036-0.09-0.51-0.1-0.47
VACODYM 890 TP1.1511.58651126253327034-0.09-0.5-0.1-0.46
VACODYM 956 TP1.3213.29951316702135044-0.1-0.57-0.11-0.53
VACODYM 965 TP1.2812.89651218702433041-0.1-0.53-0.1-0.5
VACODYM 974 TP1.2512.59451220702631539-0.09-0.5-0.1-0.47
VACODYM 983 TP1.2212.29251222302830038-0.09-0.47-0.1-0.45
VACODYM 992 TP1.1911.99001123853028536-0.09-0.45-0.1-0.43
VACODYM 238 AP1.2612.69461213531732341-0.11-0.67-0.12-0.57
VACODYM 633 AP1.2212.29151213551730538-0.1-0.64-0.11-0.57
VACODYM 655 AP1.1611.68651116702127535-0.09-0.61-0.1-0.55
VACODYM 669 AP1.1211.28201020002525532-0.09-0.57-0.1-0.51
VACODYM 677 AP1.0810.88051022302824030-0.09-0.55-0.1-0.5
VACODYM 688 AP1.0310.37701026253322528-0.08-0.51-0.09-0.46
VACODYM 745 AP1.3113.19701211151434043-0.12-0.73N/AN/A
VACODYM 776 AP1.2212.29151216702130538-0.11-0.61-0.12-0.55
VACODYM 837 AP1.2612.69501213551732541-0.11-0.62-0.12-0.54
VACODYM 854 AP1.2112.49051116702130538-0.11-0.6-0.12-0.53
VACODYM 863 AP1.1711.78751120002528035-0.1-0.56-0.11-0.51
VACODYM 872 AP1.1311.38451122302826033-0.1-0.53-0.11-0.49
VACODYM 881 AP1.1118301023853025032-0.09-0.51-0.1-0.47
VACODYM 890 AP1.0710.77951026253323529-0.09-0.5-0.1-0.46
VACODYM 956 AP1.2612.69401216702131540-0.1-0.57-0.11-0.53
VACODYM 965 AP1.2212.29101218702429537-0.1-0.53-0.1-0.5
VACODYM 974 AP1.1911.98901120702628035-0.09-0.5-0.1-0.47
VACODYM 983 AP1.1611.68701122302827034-0.09-0.47-0.1-0.45
VACODYM 992 AP1.1311.38501123853025532-0.09-0.45-0.1-0.43
VACODYM 837 DTP1.3213.29951317902335645-0.11-0.58-0.12-0.52
VACODYM 863 DTP1.2412.49401225073231840-0.1-0.51-0.11-0.47
VACODYM 872 DTP1.2129121127453529938-0.1-0.48-0.11-0.45
VACODYM 881 DTP1.1711.78901129053728536-0.09-0.47-0.1-0.44
VACODYM 890 DTP1.1411.48691131434027234-0.09-0.45-0.1-0.43
VACODYM 956 DTP1.3113.19911221882834744-0.1-0.48-0.11-0.45
VACODYM 965 DTP1.2712.79621223873032741-0.1-0.45-0.1-0.43
VACODYM 974 DTP1.2412.49411225863331339-0.09-0.42-0.1-0.4
VACODYM 983 DTP1.2112.19201227453529938-0.09-0.39-0.1-0.38
VACODYM 992 DTP1.1811.88981129053728536-0.09-0.36-0.1-0.35
VACODYM 722 DHR1.4114.110591313931840951-0.12-0.67-0.13-0.59
VACODYM 745 DHR1.391310461316312139349-0.12-0.63-0.13-0.55
VACODYM 801 TP1.4149801210351339049-0.12-0.71-0.12-0.59
VACODYM 802 TP1.3913.910251311151438048-0.12-0.7-0.12-0.59
VACODYM 803 TP1.3813.810401312751637547-0.11-0.68-0.12-0.57
VACODYM 804 TP1.3613.610301315101936546-0.11-0.65-0.12-0.56
VACODYM 805 TP1.3513.510201316702136045-0.11-0.63-0.120.54
VACODYM 806 TP1.3113.19951319902534043-0.11-0.59-0.12-0.52
VACODYM 807 TP1.2812.89751222302832541-0.1-0.57-0.11-0.5
VACODYM 808 TP1.2512.59501223853031039-0.1-0.55-0.11-0.49
VACODYM 809 TP1.2212.29301226253329537-0.1-0.52-0.11-0.47
VACODYM 801 DTP1.3913.910501315502039049-0.12-0.65-0.12-0.55
VACODYM 802 DTP1.3813.810401316302138048-0.12-0.64-0.12-0.55
VACODYM 803 DTP1.3713.710351317902337547-0.11-0.62-0.12-0.54
VACODYM 804 DTP1.3513.510201320302636546-0.11-0.59-0.12-0.52
VACODYM 805 DTP1.3413.410151321902836045-0.11-0.57-0.12-0.51
VACODYM 806 DTP1.3139851225053234043-0.11-0.53-0.12-0.48
VACODYM 807 DTP1.2712.79651227453532541-0.1-0.51-0.11-0.46

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