Anisotropic NdFeB Injection Molded Sensor Magnet

/Anisotropic NdFeB Injection Molded Sensor Magnet
  • Anisotropic NdFeB Injection Molded Sensor Magnet
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  • Anisotropic NdFeB Injection Molded Sensor Magnet, Anisotropic NdFeB MIM Sensor Magnet, Injection mould sensor permanent magnet, Bonded NdFeB Magnetic Sensor Assemblies for automotive, High performance bonded neo magnets, Injection Plastic NdFeB Magnet, Anisotropic Injection Molded NdFeB China Supplier and Factory

    Anisotropic NdFeB Injection Molded Sensor Magnet Technical
    Material: Plastic Binders and NdFeB Powder
    Method: Injection Mold
    Part No.: MPBD-IM57
    Magnetization: radial oriented
    Application: Sensor
    Grade: BNI-4
    Automotive Application
    Tolerance: ±0.1 mm
    Maximum Operation Temperature: 180 °C
    Delivery Time: 15-30 days
    Made in China

    Isotropic and anisotropic NdFeB magnets were synthesized by spark plasma sintering (SPS) and SPS+HD (hot deformation), respectively, using melt-spun ribbons as the starting materials. Spark plasma sintered magnets sintered at low temperatures (<700 °C) almost maintained the uniform fine grain structure inherited from rapid quenching. At higher temperatures, due to the local high-temperature field caused by the spark plasma discharge, the grain growth occurred at the initial particle surfaces and the coarse grain zones formed in the vicinity of the particle boundaries. Since the interior of the particles maintained the fine grain structure, a distinct two-zone structure was formed in the spark plasma sintered magnets. The SPS temperature and pressure have important effects on the widths of coarse and fine grain zones, as well as the grain sizes in two zones. The changes in grain structure led to variations in the magnetic properties. By employing low SPS temperature and high pressure, high-density magnets with negligible coarse grain zone and an excellent combination of magnetic properties can be obtained. An anisotropic magnet with a maximum energy product of ~30 MG Oe was produced by the SPS+HD process. HD at 750 °C did not lead to obvious grain growth and the two-zone structure still existed in the hot deformed magnets. Intergranular exchange coupling was demonstrated in the spark plasma sintered magnets and was enhanced by the HD process, which reduced the coercivity.  anisotropic MIM ndfeb magnets Good temperature stability was manifested by low temperature coefficients of remanence and coercivity. The results indicated that nanocrystalline NdFeB magnets without significant grain growth and with excellent properties could be obtained by SPS and HD processes.


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