Rare Earth Magnets Applications

Rare Earth Magnets Applications is proud to have been nominated as an agent for Yantai Shougang Magnetic Materials Inc. For more details about Rare Earth Magnets on the Patent and it's coverage/usage please contact us.

choice of materials & grades

Although NdFeB Magnets is lower cost and has a higher energy, there are many applications for SmCo due to it's vastly superior temperature performance and corrosion resistance. Both are extremely difficult to demagnetize but handling and assembly can be problematic as they are both brittle and fragile making them susceptible to chipping and breakage.

designed for the application

Although many standard discs and blocks exist, to take advantage of the full range of properties a careful design of the magnetic circuit to minimize leakage etc. is recommended. It is usually desirable to magnetize as the last operation in the assembly, but no magnetic losses will occur if it is necessary to use premagnetized parts.

coatings

SmCo exhibits good resistance to corrosion but for NdFeB, due to the high Iron content, it is recommended to coat the parts; please consult our technical department who will advise on the best solution for a particular application.

assemblies/specials

This family of materials is widely used in high volume applications. However, there are many more that can be best described as niche or exotic and are used in one-off's, 10's or 100's. We have a breadth of experience in designing and then machining complex shapes and mounting in housings which usually include pole pieces/ferrous components.

The first of these alloys SmCo5, was discovered in the 1960's and represented an enormous leap forward in available magnetic properties. This was followed in 1983 by the announcement of NdFeB which since that time has led to a doubling of the properties of the SmCo grades. The " rare earth " element is from the Lanthanide group and the description is a misnomer; both Samarium and Neodymium are much more prevalent in the earth 's crust than for example Lead. The most common method of production is by the powder metallurgy process, with field alignment during pressing; the resulting compact will nearly always require machining to size.