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VAC is one of the pioneers in Rapid Solidification Technology to cast thin metallic ribbons of thickness 15 -50 µm in a single process step directly from the molten metal.

Special features of this process are:

  • extremely high cooling rates of 106 K/s (i.e. from about 1400°C to less than 400 °C in one millisecond)
  • high casting speeds of 100 km/h
  • in-line winding of the thin ribbon
  • automatic reel change during winding without process interruption

Rapid Solidification Technology allows the production of metallic ribbons in the amorphous (glassy) state. The lack of long range atomic order results in superior soft magnetic properties.

Via a special annealing treatment some amorphous compositions may be transformed into nanocrystalline materials

Amorphous and nanocrystalline soft magnetic alloys are the basis for many innovative applications as magnetic cores, inductive components or in labels for electronic article surveillance (EAS).

Conventional crystalline microstructure, amorphous structure, nanocrystalline structure

Last update: 02.07.2012


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