How to quickly distinguish between neodymium iron boron or aluminum nickel cobalt in initial contact with magnets?

    Many friends who are new to magnets have asked what is the specific difference between neodymium iron boron and aluminum nickel cobalt? Which one is better to use?
    1、 Appearance differences
    Neodymium iron boron strong magnets require surface electroplating due to the easy oxidation of neodymium containing metal. Aluminum nickel cobalt has good corrosion resistance and usually does not undergo surface treatment.
    2、 Material
    The fracture surfaces of the two products are different. Neodymium iron boron is a very fine small crystal, while aluminum nickel cobalt has a rougher cross-section and larger crystal particles.
    3、 Curve detector
    If conditions permit, the demagnetization curve can be used to determine the high remanence of neodymium iron boron for these two magnetic materials.
    4、 Temperature resistance
    Neodymium iron boron usually can withstand 80 ℃. Aluminum nickel cobalt magnets demagnetize at temperatures ranging from 300 ° C to 500 ° C (aluminum nickel cobalt magnetic steel demagnetizes at temperatures exceeding 600 ° C, so we generally say that the working temperature of aluminum nickel cobalt magnetic steel is less than or equal to 550 ° C).
    5、 Magnetic strength
    Aluminum nickel cobalt is a high-temperature resistant magnet, but its magnetism is very weak. The higher the temperature resistance of the magnet, the weaker the magnetic force. The magnetic force is inversely proportional to the temperature resistance. Like ferrite, ferrite is also more high-temperature resistant than neodymium iron boron.
    6、 Magnetic material density
    Neodymium iron boron 7.5-7.6g/cm3, aluminum nickel cobalt 7.3-7.4.
    7、 Price
    Aluminum, nickel, and cobalt are expensive due to their strategic resources of cobalt and nickel, and are rarely used. Many customers choose neodymium, iron, and boron as substitutes. Aluminum, nickel, and cobalt applications involve aerospace, military, automotive industry, and security systems.