|
The Alnico (Aluminum, Nickel, Cobalt)
family was introduced in the 1930's. It's
characterized by excellent temperature
stability, high residual induction, relatively
high energies and resistant to corrosion. These
were the first materials specifically designed
for permanent magnets to be used in meters and
instruments commercially.
Alnico is vailable in both cast and sintered
forms. Sintered Alnico offer slightly lower
magnetic properties but better mechanical
characteristics than cast Alnico. These
materials are brittle, hard and cannot
effectively be machined by conventional
techniques other than by grinding. |