The High Performance NdFeB Magnet

The High performance NdFeB Magnet is a key material for a range of key technologies, including servo motors and stepping motors in robots (for example, propeller motors used for drones), precision-guided missiles, fighter aircraft, wind turbines, and MRI scanners. These technologies are essential for the development of next-generation industries and manufacturing, and they require a constant supply of high-performance neodymium iron boron (NdFeB) magnets.

NdFeB is a rare earth metal that is primarily used in the production of permanent magnets for high-precision servo and stepping motors, which need to be small in size, light in weight, and have high control accuracy. It also needs to have high power density and torque. NdFeB is widely used in a variety of applications due to its low price, strong magnetic properties and corrosion resistance.

Neodymium bonded magnets are manufactured by blending magnetic powders with a polymer as binder and then molded into desired shapes through commercial processing methods such as injection molding, compression molding, extrusion, calendering, etc. These bonded magnets are frequently used in the automotive sector because of their high density, high energy product and excellent magnetic and mechanical properties such as toughness, strength, and stiffness.

In the past few years, a number of researches have been focused on developing better NdFeB bonded magnets. These studies have been based on a number of factors such as reducing material waste, improving the processing parameters and enhancing the mechanical properties. A number of approaches have been used to achieve this, such as optimizing processing temperature, loading factor, magnet density and degree of orientation.

One method that has been shown to be effective in achieving this is utilizing a new additive manufacturing technique called Big Area Additive Manufacturing (BAAM). BAAM is a rapid additive manufacturing process that can be used to fabricate near-net-shape NdFeB bonded magnets with a high loading fraction of 70 vol%. The process is simple, requires no tooling and can be used to produce large parts at a relatively low cost. The resulting NdFeB bonded magnets are similar in density to traditional injection-molded NdFeB bonded magnets, have improved magnetic and mechanical properties, and are more compact than injection-molded bonded magnets.

These results demonstrate that BAAM is an effective technique for the fabrication of NdFeB bonded magnets that frequently contain critical rare earth elements. This approach can reduce the cost of manufacturing NdFeB bonded magnets by minimizing material waste, making it an economical choice for many types of NdFeB bonded magnets.

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