Nanocrystalline alloy were prepared by super-rapid solidification with a cooling rate of about 106 ℃/s, in which elements such as Cu and Nb were added on the basis of Fe-Si-B alloy composition. The amorphous strips were heat treated above the crystallization temperature to form nanocrystalline alloys with grain size of 10-20 nm. Compared with amorphous alloys, nanocrystalline alloys have better magnetic properties. Nanocrystalline alloy can replace Co based amorphous alloy,Permalloy and Ferrite to make the electronic devices small in size,light in weight and high efficient.
Manufacturing Methods Of Nanocrystalline Alloys
A Schematic Diagram Of The Crystallization Process Of Nanocrystalline Alloys
Diagrams Of typical Heat Treatment Process Of Nanocrystalline Alloys
High saturation flux density and High permeability.
Low coercive force.
Low core loss (1/3-1/5 of silicon steel).
Low excitation current .Good thermal stability and aging stability energy saving.
Excellent characteristics over wide frequency range.
Flexibility to control magnetic properties B-H curve shape during annealing.
|Saturation Magnetization(Bs)||1.25T||Saturation Magnetostrictive Coefficient(λs)||<2×10-6|
|Hardness(Hv)||800||Continuous Operating Temperature Range||-55~130℃|
|Annealing Method||Non-magnetic Annealing|
|Residual Magnetic Flux Density||0.6T|
|Iron Loss P(20kHz,0.5T)||<25W/kg|
|Iron Loss P(100kHz,0.3T)||<150W/kg|
|Iron Loss Change Rate (-55℃~125℃)||<15%|
Mainly used in substituting for silicon steel, to make cores for all kinds of distribution transformers, medium frequency transformers, operating frequency ranges from 50Hz to 10kHz, working as large power switch reactor core material, the operating frequency can be up to 50KHZ.
Nanocrystalline alloys can be treated by magnetic field (transverse magnetic field and longitudinal magnetic field) according to the need of products. Transverse magnetic treatment means heat treatment along the direction of strip with external magnetic field, and longitudinal magnetic treatment means heat treatment in the direction of vertical strip with external magnetic field. The magnetic properties of nanocrystalline alloys treated by magnetic field will change partially. Specific DC B-H loops are shown in the table below.
|Number||Part No.||Width(mm)||Thickness Deviation(μm)||Thickness（μm）
|1||SUMNANO2||2||±1||16-19||20-24||Direct Sprayed ribbon/
Other columns dimensions available according to requirements (2~50mm).
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