Samarium cobalt block magnets, often abbreviated as SmCo magnets, are a type of rare earth magnet made from an alloy of samarium and cobalt. Developed in the early 1970s, these magnets are known for their exceptional magnetic strength and remarkable resistance to demagnetization. SmCo magnets typically operate well in high temperature conditions, up to 350 degrees Celsius, which makes them ideal for applications in motors, turbines, and aerospace where high temperature tolerance is crucial. Additionally, they have excellent corrosion resistance and do not require a protective coating, unlike other types of magnets such as neodymium. However, SmCo magnets are more brittle and prone to cracking under stress, and they are also generally more expensive due to the cost of cobalt and the complex manufacturing process involved. These magnets come in various shapes, but as block magnets, they are usually rectangular and are utilized in industries that require stable magnetic performance under extreme conditions.
