Scientists rely on the melt spinning process of other alloys that have been tried and tested, also known as "rapid solidification". Details are as follows:
The researchers liquefied the magnets in a furnace. Liquefied materials are heated to more than 1000 ℃ and guided to water-cooled copper wheels through nozzles, which rotate at a speed of 10 to 35 meters per second. Once the molten droplet touches the copper, it will transfer it to the metal and solidify in a few seconds.
Scientists say the new material forms into sheets. It is characterized by the structure formed inside the sheet. If the melted material is allowed to solidify in a normal way, the atoms will be arranged in rows in the lattice. However, during the melt spinning process, crystallization is avoided: either an amorphous structure is formed, in which the atoms are arranged irregularly, or a nanocrystalline structure is formed, in which the atoms are arranged in nanocrystalline grains to form a crystal structure.
Advantages: Grain sizes -- meaning areas with the same crystal structure -- can be specially changed. They can be used to change the properties of permanent magnets.
