Hitachi Metals America, Ltd.

Hitachi

Amorphous & Finemet Materials


Amorphous & Nanocrystalline Materials

Overview

Metglas® is an amorphopus metal, Amorphous metals do not have crystalline structure like other magnetic materials. All the atoms in an amorphous metal are randomly arranged, thus giving it a higher resistivity (about three times) value than that for crystalline counterparts. Amorphous alloys are prepared by cooling the melt at about million degrees per second. This fast cooling does not give the atoms enough time to rearrange into stable crystalline form. As a result one gets metastable amorphous structure. Because of the absence of crystalline structure amorphous alloys are magnetically soft (lower coercivity, lower core loss, higher permeability). High resistivity gives lower loss at higher frequencies. The losses are among the lowest of any known magnetic materials.

Nanocrystalline or Finemet® Nanocrystalline - The precursor of FINEMET® Nanocrystalline is amorphous ribbon (non-crystalline) obtained by rapid quenching at one million °C/second from the molten metal consisting of Fe, Si, B and small amounts of Cu and Nb. These crystallized alloys have grains which are extremely uniform and small, "about ten nanometers in size". Amorphous metals which contain certain alloy elements show superior soft magnetic properties through crystallization. It was commonly known that the characteristics of soft magnetic materials are "larger crystal grains yield better soft magnetic properties". Contrary to this common belief, soft magnetic material consisting of a small, "nano-order", crystal grains have excellent soft magnetic properties.


Products of soft magnetic cores made of Metglas® Amorphous Alloys:

  • MAGNAPERM® High Permeability Toroidal Cores manufactured with Cobalt-based MetglasĀ®amorphous alloy 2714A
  • MAGAMPS Square Loop Cores manufactured with Cobalt-based Metglas® amorphous alloy 2714A
  • MICROLITE® Inductor Cores manufactured with Iron-based Metglas® amorphous alloy 2605SA1
  • POWERLITE® Metglas® amorphous C-Cores, AMCC-xxxx series manufactured with Iron-based Metglas® amorphous alloy 2605SA
  • Magnetic Shielding Sheets


Products of soft magnetic cores made of FINEMET® Nanocrystalline Alloys:

  • FT-3KM series toroidal cores for Common Mode Chokes manufactured with FINEMET® Nanocrystalline FT-3KM material
  • FT-3KL K series toroidal cores for Common Mode Chokes manufactured with FINEMET® Nanocrystalline FT-3KL material
  • FT-3KM N series toroidal cores for 3-phase common mode chokes manufactured with FINEMET® Nanocrystalline FT-3KM material
  • FT-3KL F series toroidal cores for common mode chokes manufactured with FINEMET® Nanocrystalline FT-3TL material
  • FT-3KM S series Square Shaped Bus bar cores for common mode chokes manufactured with FINEMET® Nanocrystalline FT-3KM material
  • FT-3AM B series FINEMET® Beads for surge current suppression manufactured with FINEMET® Nanocrystalline FT-3KM material
  • MP series toroidal cores Surge Absorber Cores and Satrable core in magamp manufactured with FINEMET® Nanocrystalline FT-3SH material
  • FT-3K50T F series toroidal cores for common mode chokes manufactured with FINEMET® Nanocrystalline FT-3K50T material
  • FT-8K50D F series toroidal cores for common mode chokes manufactured with FINEMET® Nanocrystalline FT-8K50D material
  • FT-3TL F series toroidal and Square shape cores for Switching Power Transformers manufactured with FINEMET® Nanocrystalline FT-3TL material
  • Magnetic Shielding Sheets

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