The difference between SmCo magnet and NdFeB magnet

1. Different ingredients

In the neodymium-iron-boron magnet, the rare earth metal neodymium accounts for about 29% to 32.5%, the metallic element iron accounts for 64% to 69%, and the nonmetallic element boron accounts for 1.1% to 1.2%. In addition, a small amount of elements such as ytterbium, scandium, niobium, and copper are added .

SmCo magnets take 2:17 type as an example. Rare earth metal samarium accounts for 23% to 28%, metal cobalt accounts for 48% to 52%, metal element iron accounts for 14% to 17%, and a small amount of copper, zirconium and other elements.

2, performance and price are different

According to the previous performance table, it can be found that the overall magnetic performance of samarium cobalt permanent magnet is lower than that of neodymium iron boron permanent magnet. In addition, samarium cobalt magnets are slightly more expensive than neodymium-iron-boron magnets of the same performance size. From the ratio of the metal elements of the two, it can be seen that the content of iron in the neodymium-iron-boron is the highest, and the content of samarium and cobalt in the samarium-cobalt magnet is about 70%.

3.High temperature resistance, oxidation resistance and corrosion resistance

The operating temperature of NdFeB permanent magnet is between 80 ℃ ~ 200 ℃, while the operating temperature of samarium cobalt permanent magnet can reach 250 ℃ ~ 350 ℃.

Nd-Fe-B magnets have a high iron content, so they are easily oxidized and corroded. The surface treatment process is essential. The service life of the magnet depends largely on the effect of the coating. Sm-Co magnets have less iron content Basically, it is a metal element that is not easy to be oxidized and corroded. Generally, no surface treatment is needed, unless the working environment is relatively harsh or the plating is done to beautify the appearance. I hope that everyone can get a preliminary understanding and understanding of samarium cobalt permanent magnet materials through this article. If there is any deficiency, please leave a message to add.

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The difference between SmCo magnet and NdFeB magnet

The difference between SmCo magnet and NdFeB magnet

The difference between SmCo magnet and NdFeB magnet