Alnico magnet Magma Magnets Manufacturing

Alnico permanent magnets

AlNiCo materials, composed primarily of alloys of Aluminum, Nickel, and Cobalt are characterized by excellent temperature stabilities, high residual inductions, and relatively high energies.

AlNiCo alloys have some of the highest Curie points of any magnetic material, around 800 °C. This material is used extensively in application required high temperature up to 450°C.

AlNiCo magnets are manufactured through either a casting or sintering process. Cast magnets may be manufactured in complex shapes. AlNiCo magnets are cast close to final size and then finish machined to closer tolerances. Sintered AlNiCo offer slightly lower magnetic properties but better mechanical characteristics. AlNiCo has a low coercive force, and is easily demagnetized if not handled with care.

Some types of AlNiCo are isotropic and can be efficiently magnetized in any direction. Other types, such as AlNiCo 5, 8 and AlNiCo 12, are anisotropic, with each having a preferred direction of magnetization, or orientation.

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