Besides being especially qualified for extremely high temperatures – typically up to 250-350°C – samarium cobalt magnets have the following advantages:
SmCo magnets are produced by powder compaction followed by a sintering process. Mainly because of the cobalt contents of the magnets, these types of magnets are a more expensive solution.
Samarium cobalt magnets do not corrode easily but for medium to very corrosive environments, some kind of surface treatment or incapsulation is recommended.
The most important properties to take into consideration for characterising the magnets are:
Besides being especially qualified for extremely high temperatures – typically up to 250-350°C – samarium cobalt magnets are very strong and have very stable properties even in varying temperatures.