Cast alnico are powerful permanent magnets which are made primarily
from aluminum, nickel, cobalt, copper, iron and sometimes titanium.
Alnico magnets come in two varieties that is cast and sintered. Manufacturing
Cast alnico magnet is prepared by melting and pouring into a mold. Once the molten material in the mould is solidified, it is rough ground and then cooled after treating with heat. When alnico is treated in the presence of magnetic field, the magnet is called anisotropic. In this process the material is oriented to take on maximum
magnetization
and allows a higher gauss level. If the cast magnet is heat treated in
the absence of magnetic field it is called as isotropic. After heat
treatment is over magnet is cooled and grounded to specific tolerances
and then magnetized.Characteristics of Cast Alnico Magnets
- The size of cast alnico magnets vary.
- Cast alnico can be carved into various shapes.
- Cast alnico has better resistant to corrosion and demagnetization.
- These magnets also have excellent thermal stability.
Cast alnico magnets finds the applications in the following industries:
- Motors
- Sensors
- Loudspeakers
- Electronic sensors
- Magnetron
- Reed switches