Iron-based nanocrystalline soft-magnetic alloy with excellent high-frequency performance 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 low saturation magnetization, low coercive force, and high alloy cost

Active Publication Date: 2014-10-08
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the soft magnetic properties of amorphous soft magnetic alloys have been improved to varying degrees by adjusting the alloy composition and preparation process, but there are still obvious defects in general: 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; the composition of the alloy contains one or more of noble metal elements such as Nb, Zr, Co, Ni, Hf, etc., resulting in a higher cost of the alloy; it does not contain B elements and Iron-based nanocrystalline alloys with good soft magnetic properties, high amorphous-forming ability, high thermal stability, and excellent high-frequency performance have been rarely reported so far

Method used

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  • Iron-based nanocrystalline soft-magnetic alloy with excellent high-frequency performance and preparation method thereof
  • Iron-based nanocrystalline soft-magnetic alloy with excellent high-frequency performance and preparation method thereof
  • Iron-based nanocrystalline soft-magnetic alloy with excellent high-frequency performance and preparation method thereof

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Embodiment 1

[0045] The expression Fe of the iron-based nanocrystalline alloy according to the present invention a Si b P c Cu x m y and its content to prepare a group of alloy samples when y=0, wherein the specific composition of each sample is as shown in Table 1, sample number 4-14 is the alloy sample prepared in this embodiment, and the alloy sample of number 1-3 is Comparative example (which contains B elemental component). The preparation method of contrast sample and alloy sample of the present invention is identical, and concrete preparation steps are as follows:

[0046] 1) Pure Fe, pure Si, pure Cu and Fe-P alloys with a purity greater than 99.5% are classified according to the alloy composition Fe a Si b P c Cu x m y (atomic percentage) ratio;

[0047] 2) Then put the proportioned raw materials into the ceramic crucible of the induction melting furnace, and first evacuate to 5×10 －3 Pa, and then filled with argon gas until the pressure is 0.09MPa for melting, fully sm...

Embodiment 2

[0058] In the iron-based nanocrystalline alloy Fe of the present invention a Si b P c Cu x m y (wherein y is not equal to 0) composition range prepares a group of different alloy samples, wherein the composition of sample is as shown in table 1 sample number 15-41, according to the alloy formed in table 1, by the same step as in embodiment 1 , to prepare iron-based nanocrystalline alloy strips, and then test the properties of samples 15-41 by the same test method as in Example 1, and the measured results are shown in Table 1. The alloy in this embodiment has added M-type metal elements, because there are many samples, the following examples are given to illustrate, as in Table 1, sample number 15 (Fe 85 Si 5 P 6.5 Cu 1.5 Zr 2 ), using high vacuum and argon protection to avoid the embrittlement, edge burnt and segregation of P elements, and the surface of the prepared strip is bright, while ensuring the excellent soft magnetic properties and high thermal stability of th...

Embodiment 3

[0065] In the iron-based nanocrystalline alloy Fe of the present invention a Si b P c Cu x m y Composition Range Prepare a group of different alloy samples. The magnetic properties of the same product obtained under different heat treatment conditions are shown in Table 2. Sample numbers 42-44 are a group of examples prepared according to the present invention. The preparation method is the same as in Example 1, and the properties of samples 42-44 are tested by the same test method as in Example 1, and the measured results are shown in Table 2.

[0066] From the sample analysis results of this example, it can be seen that the soft magnetic properties of the same product are basically stable at different heat treatment temperatures, indicating that the product of the present invention has a thermally stable temperature range of about 200°C and has high thermal stability.

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Abstract

The invention discloses iron-based nanocrystalline soft-magnetic alloy with excellent high-frequency performance and a preparation method thereof. The expression of the alloy is FeaSibPcCuxMy, wherein a, b, c, x and y respectively represent the atomic percent content of corresponding compositions and satisfy the following conditions: 70<=a<=85, 5<=b<=15, 5<=c<=18, 0.0001<=x<=3, 0<=y<=5, a+b+c+x+y=100%, and M is one or more of Zr, Ti, Ta, Hf, Nb, V, W, Mo, Mn, Cr, Re, Zn, In, As, Sb, Bi, Ca, platinum group elements, rare earth elements, N, Sn, Ge, Ga and Al. The alloy is a nanocrystalline soft-magnetic alloy band prepared by employing a single-roller quick-cooling method under the conditions of high vacuum and argon protection. The alloy does not contain B elements, is good in soft magnetic property, high in thermal stability, low in high-frequency loss and low in magnetostriction coefficient.

Description

technical field [0001] The invention relates to the field of amorphous and nanocrystalline soft magnetic materials, in particular to an iron-based nanocrystalline soft magnetic alloy with excellent high-frequency performance and a preparation method thereof, which also has good soft magnetic properties. Background technique [0002] Since the appearance of soft magnetic alloy materials, they have received extensive attention and in-depth development because of their excellent soft magnetic properties such as high saturation magnetic induction, high magnetic permeability, low loss, and low coercive force. With the development of science and technology, electronic equipment tends to be miniaturized, so the development of soft magnetic alloy materials with high saturation magnetic induction and low coercive force is one of the most popular research directions in the field of soft magnetic. After the advent of iron-based amorphous materials, they are mainly used as soft magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C45/02C22C33/06B22D11/06H01F1/147H01F1/153
Inventor 周少雄向睿董帮少张广强李宗臻
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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