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Amorphous Metal Metglas & Nanocrystalline Material

Amorphous Metal Metglas & Nanocrystalline Material

Hitachi Metglas


Unlike other magnetic materials, amorphous metals such as Metglas® do not have a crystalline structure. Compared to crystalline metals, amorphous metals have a higher resistivity due to random arrangement of atoms. During the formation of amorphous alloys, the atoms do not get rearranged into stable crystals as the process involves ultrafast cooling. Amorphous alloys have more permeability, lower core loss, lower coercivity and are magnetically soft because they do not have crystalline structure. Losses are lower at higher frequencies due to high resistivity. Amorphous materials offer the lowest losses among all magnetic materials known.

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Hitachi Nanocrystalline Material FINEMET

Nanocrystalline Material FINEMET®

B (Boron), Si (Silicon) and Fe (Iron), along with small quantities of Nb (Niobium) and Cu (Copper), are quenched at the rate of a million degree Celsius per second from a molten state to form a non-crystalline, amorphous ribbon which is the predecessor of FINEMET® Nanocrystalline. Uniform grains, approximately 10 nanometers in size, comprise nanocrystalline alloys. Crystallization leads to greater soft magnetic properties in amorphous metals containing particular alloy elements. Exceptional soft magnetic properties are found in soft magnetic material with "nano" crystal grains.

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