How Do We Make Amorphous Metals in 2020?
Amorphous metals have brought new development opportunities for materials science and manufacturing, especially in the field of energy conversion. Traditional crystalline alloys need to be processed in multiple steps to obtain better properties, such as quenching and electroplating. Amorphous metals can be formed in one step through a single-step solution, such as rapid cooling during processing. Therefore, it exhibits magical physical properties that any crystalline metal cannot reach, such as high permeability and low magnetic loss.
Amorphous metals and common alloys
Metal alloys have the characteristic of sharing crystal structure, which is a double-edged sword in terms of machining and physical properties. Amorphous metal (bulk metallic glass) provides an alternative in terms of materials due to the random arrangement of atoms. Crystalline metals and amorphous metals are similar when heated to a molten state at a high temperature, that is, both are amorphous. However, when amorphous metals are rapidly cooled, they will directly change from liquid to crystalline state. Therefore, it exhibits different characteristics from crystalline metals.
Manufacturing of amorphous metals
Amorphous metals usually use a rapid cooling method, usually 1 million degrees Celsius per second, to spray molten iron into strips. The resulting ribbon made by SAT Amorphous can be wound into different shapes for use in manufacturing amorphous cores, which are widely used in charging piles, photovoltaics, inductors, medical equipment and other applications. Compared with the advantages of traditional ferrite cores, please refer to the previous article 'Nanocrystalline No Ferrite' on SAT BLOG.
Amorphous metal has a random atomic structure
As the amorphous metal cools, the lack of phase change will maintain a liquid microstructure in the formed metal. Therefore, almost no shrinkage occurs during the manufacturing process, so the manufacturing in the mold is the final result. It has the following advantages when matching the mold to make the amorphous core:
1. The size of the amorphous core can be accurately controlled by the number of winding turns, and there will be no major deformation after molding.
2. The inside of the amorphous core can be drained by dipping paint to make the entire magnetic core structure more compact.
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