Plating's Effect on the Magnetic Strength of NdFeB Magnets
When in electroplating process, the power line will be gathered in the corners of the NdFeB magnets
and causes stress concentration, leading to cracking coating. To avoid such a situation occurred,
we need to deal with chamfer on magnets, which can give rise to magnetic loss. For shielding effect
of ion move of deposition process, the coating of the NdFeB magnet which have a hole in is of poor
quality,especially with the deep hole is more difficult to film.
For the nickel plating NdFeB magnets, as a ferromagnetic nickel coating, the magnet will have a
magnetic shielding effect.Also there irreversible magnetic loss is caused when in the process of
electroplating ,the electronplating liquid will infiltrate into the porous surface of the NdFeB
magnet and have an negative impact on the properties of the magnetĄŻ surface.Besides the impact of
ions, the NdFeB magnet performance impact of thermal history during the electroplating process can
not be ignored, generally electroplating liquid has a certain temperature, then the plating process
is equivalent to the aging of magnet,so the NdFeB magnet will be aging and of coercivity is
declining, but such an impact can be eliminated afer heat treatment when finish the plating process.
In addition, the NdFeB magnet volume changing because of magnetostrictive effect during the
magnetization process. it will cause changes of the coating stress and poor combination between
coating layer and the substrate resulting in coating failure.Study the effects of the different
process conditions on the magnetic strength can help us to make solutions in magnet design,
process improvement, post-processing so as to provide high-performance, high stability of the magnet
devices for the market.
and causes stress concentration, leading to cracking coating. To avoid such a situation occurred,
we need to deal with chamfer on magnets, which can give rise to magnetic loss. For shielding effect
of ion move of deposition process, the coating of the NdFeB magnet which have a hole in is of poor
quality,especially with the deep hole is more difficult to film.
For the nickel plating NdFeB magnets, as a ferromagnetic nickel coating, the magnet will have a
magnetic shielding effect.Also there irreversible magnetic loss is caused when in the process of
electroplating ,the electronplating liquid will infiltrate into the porous surface of the NdFeB
magnet and have an negative impact on the properties of the magnetĄŻ surface.Besides the impact of
ions, the NdFeB magnet performance impact of thermal history during the electroplating process can
not be ignored, generally electroplating liquid has a certain temperature, then the plating process
is equivalent to the aging of magnet,so the NdFeB magnet will be aging and of coercivity is
declining, but such an impact can be eliminated afer heat treatment when finish the plating process.
In addition, the NdFeB magnet volume changing because of magnetostrictive effect during the
magnetization process. it will cause changes of the coating stress and poor combination between
coating layer and the substrate resulting in coating failure.Study the effects of the different
process conditions on the magnetic strength can help us to make solutions in magnet design,
process improvement, post-processing so as to provide high-performance, high stability of the magnet
devices for the market.
Tags: neodymium magnets NdFeB Magnets Smco magnets