Thank you for taking interest in the energy efficient amorphous material!
An amorphous metal, also known as ''metallic glass'' is a solid metallic material with a disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a structure of liquids and glasses. But unlike common glasses, such as window-glass, which are typically insulator (electricity) insulators, amorphous metals have good electrical conductivity. There are several ways in which amorphous metals can be produced, including extremely rapid cooling, physical vapor deposition, solid-state reaction, ion irradiation, and mechanical alloying.
Producing cores from this material follows the following basic process: first the material is cut into specific lengths, it is then formed using precise dimensional tooling, in a clean environment. Once it is formed, the core is heated at a high temperature to bond the edges of the material. Once this process is complete, the core is annealed, tested and ready for assembling.
Check this video from ABB in Poland - talking about amorphous distribution transformers.
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