Samarium cobalt (SmCo5 and Sm2Co17)
Sintered
Versatile, see data sheet
Product
First choice for very high temperatures
Although NdFeB magnets undoubtedly have advantages, SmCo magnets are unbeatable in three areas: The most significant benefit is temperature resistance, which can reach up to 550°C in certain applications. Additionally, they have a low temperature coefficient and are corrosion-resistant, usually requiring no coating.
High temperature resistance
Corrosion-resistant
Can be used in demagnetized fields
General
Often more competitive than neodymium magnets
SmCo and NdFeB magnets are high-energy magnets. SmCo magnets are made from the rare earth elements samarium and cobalt, with additional allowing elements like iron, copper and zirconium influencing their product properties. While SmCo magnets are far less commonly used than NdFeB magnets, they are significantly more competitive in several aspects. They have higher temperature resistance, are largely corrosion-resistant and resilient against demagnetization. In short, wherever very strong magnetic fields are required under extreme temperature conditions, SmCo magnets are the go-to choice.
Chemical Resistance
Largely Resistant
Gasoline
Uric acid < 10%
Engine oil
Organic solvents
Alkaline acids
Conditionally Resistant
Uric acid > 10%
Not Resistant
Inorganic acids
Saline solutions
Salts in aqueous solution
Hydrogen gas
PRODUCTION PROCESS
Sintered SmCo magnets
SmCo magnets made from the rare earth elements samarium and cobalt undergo the same production process as magnets made from NdFeB. They are sintered.
Note
SmCo magnets are less popular than NdFeB magnets. They are heavier, extremely brittle and have a lower level of magnetization.
TECHNICAL DATA
What the sintered SmCo magnet can do
Sintered SmCo magnets outperform comparable NdFeB magnets in terms of temperature resistance, corrosion resistance and durability.
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