could reach as high as 1073 º K /
800 º C. Temperature coefficients for
SmCo materials are in the range - 0.04 % / º C for Br and - 0.30 % / º
C for iHc.
SmCo magnets are highly prone to chipping
and cracking, and specialized machining techniques are
required. Press-fit assembly is not recommended because of their brittle nature. The SmCo materials are
sensitive to thermal shock and hairline fractures can occur if subjected to thermal shock. Where cosmetic
appearance of a magnet is important, this should be specified to us prior to ordering.
SmCo magnets require extremely high
magnetizing fields. It requires fields of about 40 KOe in order
to be saturated. This is not common to produce and large power supplies in
conjunction with carefully designed magnetizing fixtures must be used.
A special consideration must be given to this when designing
complex assemblies if it is intended to magnetize after assembly.
WARNING:
Due to their extremely high magnetic strength and brittle
nature, SmCo magnet parts must be handled very carefully to prevent injury to
personnel and damage to the magnets. Receiving and assembly personnel must be
pre-warned about the dangers of handling these magnet parts.
