Composite material made of a thermo-hardening matrix and isotropic neodyme-iron-boron powder.
Manufacture is by compression moulding.
In addition to standard shapes (cylinders, blocks or rings), it is possible to obtain more complex shapes.
Thanks to its high specific energy (close to 80 kJ/m3), BREMAG 10 is highly suitable for miniaturisation.
By changing the resin/magnetic powder ratio, it is possible to reduce the magnetic performance of BREMAG 10 and therefore its cost. Subject to testing, a specific energy of 40 kJ/m3 can be obtained.
The compression process enables relatively simple moulds to be used, which means a lower cost than those used for injection.
Conversely, this process makes potting onto a shaft difficult, and dual injection of plastic + plasto-magnet is impossible (two separate moulding operations are necessary).
It is necessary to take the same precautions to machine BREMAG 10 as for the machining of NEOPLAST.
Thanks to its plastic matrix, BREMAG 10 offers better stability with respect to mechanical stresses than sintered magnetic materials.
The mechanical performance of BREMAG 10 is a little lower than that of NEOPLAST. This slightly reduced mechanical performance is due to the fact that the percentage of plastic binder used is lower.
Possible tolerances: 0.2 to 0.03 mm.
For use under normal ambient conditions, no particular protective measures are necessary for BREMAG 10. Conversely, for use in a humid or aggressive environment, it is necessary to provide protection by means of a surface treatment (parylene, paint, resin, etc.).
Accelerated corrosion tests are also recommended.
The very high coercitivity of BREMAG 10 enables shapes to be produced with reduced wall thicknesses. Due to the isotropy, magnetisation can be performed in any direction (axial, radial and multipolar).
Standard products available.
BREMAG 10 is available in the following standard shapes and sizes.
Magnetisation is carried out according to the thickness of the magnet.
We can manufacture prototype moulds and magnetisers and prototype parts.
Standard shapes can facilitate the creation of these prototypes:
Provide protection against corrosion of machined surfaces, using vaporised paint or resin for example.