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High saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material and preparation method thereof

A technology of iron-based nanocrystals and soft magnetic alloys, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of complex preparation process, low saturation magnetization, large high-frequency loss, etc., to reduce costs and improve saturation. Magnetization, the effect of reducing the content

Active Publication Date: 2010-09-15
朗峰新材料启东有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Among them, although NANOPERM alloy has a high saturation magnetization, its soft magnetic properties are not as good as FINEMET alloy, and because it contains a large amount of easy-to-oxidize noble metal element Zr, the cost is high and the preparation process is complicated, so it has not been really popularized and applied so far; while in NANOPERM The HITPERM alloy system invented on the basis of the alloy, although its Curie temperature and saturation magnetization are higher than that of the NANOPERM alloy, and its high-frequency characteristics are also better than that of the NANOPERM alloy, but due to the addition of the noble metal element Co, the overall soft magnetic performance decreases and the cost increases. Has not been promoted so far
In comparison, the FINEMET alloy has the best overall performance and has been widely used, but this alloy system also has obvious disadvantages: its high-frequency loss is relatively large, the saturation magnetization is relatively low, and the highest saturation magnetic induction Only 1.4T, and Fe with better comprehensive performance 73.5 Cu 1 Nb 3 Si 13.5 B 9 The saturation magnetic induction of the alloy under the optimal annealing condition is only 1.24T
[0012] The above-mentioned patents have improved the soft magnetic properties of nanocrystalline alloys to varying degrees by adjusting the alloy composition and preparation process, but there are two obvious defects in general: (1) the saturation magnetization is still not very high, especially It is impossible to achieve high saturation magnetization and low coercive force at the same time; (2) the composition of the alloy contains one or more of noble metal elements such as Nb, Zr, Co, Ni, Y, etc., resulting in higher cost of the alloy

Method used

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  • High saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material and preparation method thereof
  • High saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material and preparation method thereof
  • High saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material and preparation method thereof

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Embodiment 1

[0030] Raw materials such as iron (3N5), silicon (4N), boron (3N), phosphorus iron (3N) and copper (3N) are used according to the alloy composition Fe 82.7 Si 3.95 B 8.4 P 4.3 Cu 0.65 (atomic percentage) proportioning; then put the good proportioning raw materials into the ceramic crucible of the induction melting furnace, and high-frequency induction melting 4 times to obtain an alloy ingot with uniform composition;

[0031] The alloy ingot is crushed and loaded into a quartz tube, and the single-roller quenching strip process is adopted, and the strip is thrown at a speed of 35m / s in an Ar atmosphere to obtain an amorphous alloy strip with a width of 1.29mm and a thickness of 26μm;

[0032] Place the amorphous strips in a quartz tube and evacuate to 3 × 10 -3 Pa, filled with Ar gas to an atmospheric pressure, then closed the quartz tube; placed the quartz tube in a heat treatment furnace, raised the temperature to 510 °C at a rate of 2.2 °C / s, kept the temperature for 2 ...

Embodiment 2

[0038] Raw materials such as iron (3N5), silicon (4N), boron (3N), phosphorus iron (3N) and copper (3N) are used according to the alloy composition Fe 82.7 Si 3.95 B 8.4 P 4.3 Cu 0.65 (atomic percentage) proportioning; Synthesize the amorphous strip with the technique in embodiment 1, seal in the quartz tube and place in the heat treatment furnace, rise to 515 ℃ with the heating rate of 2.2 ℃ / second then, keep warm for 1.25 minutes, immediately The quartz tube was taken out and quenched in water to room temperature.

[0039] The XRD patterns of the nanocrystalline strips after the crystallization heat treatment at 515°C for 1.25 minutes are as follows: Figure 5 shown. It can be seen that the nanocrystals precipitated by primary crystallization are body-centered cubic Fe with Si in solid solution, that is, α-Fe(Si). However, the grain size is very small, and the Rietveld structure refinement can be calculated by using the basic parameter method of the Topas 3.0 software ...

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Abstract

The invention relates to a high saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material and a preparation method thereof. The high saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy material is a FexSiyBzPaCub alloy comprising ferrum, silicon, boron, phosphorus and copper, wherein x, y, z, a and b in the formula respectively represent atom percentage content of each corresponding component, x=70-90%, y=1-15%, z=1-20 %, a=1-20% and b=0.1-1%, and x+y+z+a+b=100%; the microstructure of the Fe-based nanocrystalline magnetically soft alloy is as follows: a body-centered cubic Alpha-Fe(Si) nanocrystalline phase with the size of 1-35nm and an amorphous phase rich in phosphorus and boron coexist, and the amorphous phase is the basic phase. The preparation method comprises steps of: preparing proportioned raw materials into an alloy ingot, preparing into amorphous alloy and carrying out other procedures to obtain the high saturation magnetization intensity Fe-based nanocrystalline magnetically soft alloy. The invention can greatly enhance the saturation magnetization intensity of the nanocrystalline magnetically soft alloy, maintain lower coercivity and effectively reduce cost of raw materials simultaneously.

Description

technical field [0001] The invention relates to a nanocrystalline soft magnetic alloy material and a preparation method thereof, in particular to a high saturation magnetization iron-based nanocrystalline soft magnetic alloy material and a preparation method thereof. Background technique [0002] Soft magnetic materials are the first class of magnetic functional materials developed by human beings. They are required to have magnetic properties such as high saturation magnetization, high magnetic permeability, low coercive force and low loss. From the end of the 19th century to the present, its development has experienced electrical pure iron, Fe-Si alloy (silicon steel), Fe-Ni alloy (permalloy), Fe-Al alloy, Fe-Si-Al alloy, Fe-Co alloy, soft magnet Oxygen body and Fe-based amorphous, nanocrystalline alloy and other systems. At present, silicon steel and soft ferrite are the most widely used soft magnetic materials. However, the iron loss of silicon steel is large, and the ...

Claims

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Application Information

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IPC IPC(8): H01F1/153C22C45/02C22C33/04C21D1/18C21D1/74
Inventor 沈宝龙苏海林
Owner 朗峰新材料启东有限公司
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