Cast AlNiCo Magnets

The majority of AlNiCo magnets are cast type. Cast AlNiCo magnets are manufactured by conventional foundry processes. AlNiCo alloys with different composition are melted and poured into the resin bonded sand molds, then solidified material with a rough surface will undergo heat treatment and cooling process. Cast AlNiCo magnets can be divided to the isotropic form and anisotropic form base on whether apply the magnetic field to orient magnets during the cooling process. For cast AlNiCo magnet, its anisotropy is a kind of shape anisotropy which associated with elongated Fe-Co particles in a Ni-Al matrix aligned parallel to the magnetic field during spinodal decomposition of the alloy. Therefore, material will be machined to specific geometry and tolerance after heat treatment process.