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Iron-based bulk amorphous soft magnetic alloy and preparation method thereof

A soft magnetic alloy, amorphous alloy technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem that amorphous alloys are difficult to widely practically apply, and achieve the effects of low cost and simple preparation method.

Active Publication Date: 2012-07-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because most of the amorphous matrix contains a large amount of precious metals or rare metals, the expensive raw material prices make it difficult for amorphous alloys to be widely used in practice.

Method used

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  • Iron-based bulk amorphous soft magnetic alloy and preparation method thereof
  • Iron-based bulk amorphous soft magnetic alloy and preparation method thereof
  • Iron-based bulk amorphous soft magnetic alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0033] Preparation (Fe 0.5 co 0.5 ) 69.7 B 20 Si 5 Nb 4.3 Tb 1.0 Large pieces of metallic glass.

[0034] Raw material Fe, Co, FeB, Si, Nb, Tb are Fe: Co: B: Si: Nb: Tb = 34.85: 34.85: 20: 5: 4.3: 1 batching according to atomic percentage, Fe, Co, Tb in the raw material The purity is not higher than 99.0wt% and B is added in the form of industrial FeB alloy. The prepared material is put into an arc melting furnace with an argon atmosphere, mixed and smelted for 4-5 times, and obtained after cooling (Fe 0.5 co 0.5 ) 69.7 B 20 Si 5 Nb 4.3 Tb 1.0 master alloy ingot, and break the ingot into small pieces; then use the vacuum copper mold casting method to melt the small piece of ingot again, and press the master alloy melt into the copper mold to obtain the composition (Fe 0.5 co 0.5 ) 69.7 B 20 Si 5 Nb 4.3 Tb 1.0 , a bulk amorphous alloy with a diameter of 3 mm.

[0035] From figure 1 The X-ray diffraction (XRD) shown can prove that the diameter is 3mm (Fe 0....

Embodiment 1

[0036] Example 1, 2, 4, 5, 6

[0037] Various ratios of iron-based bulk amorphous alloys were prepared.

[0038] A series of iron-based bulk amorphous alloys with various ratios were prepared according to the method of Example 1, and their compositions and thermophysical parameters are listed in Table 1.

[0039] Note: 1) The symbols in the table have the following meanings:

[0040] Φ——Critical diameter size under the experimental conditions; T c - Curie temperature; T g ——glass transition temperature; ΔT x —Width of subcooled liquid phase region; T 1 - liquidus temperature; T rg ——Reduced glass temperature; M s ——saturation magnetization; H c --Coercivity.

[0041] 2)T rg =T g / T 1 ;

[0042] 3) The heating rate used in the measurement of each component sample in the table is 40K / min.

[0043] Table 1. Composition, thermal properties and magnetic performance parameters of various proportioning iron-based bulk amorphous alloys of the present invention

[0044] ...

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Abstract

The invention discloses an iron-based bulk amorphous soft magnetic alloy and a preparation method thereof; the molecular formula of the amorphous alloy is (Fe 0.5Co0.5) 70.7-xB20Si5Nb4.3Tbx; wherein the numeric range of x is x larger than or equal to 0 and less than or equal to 2.5; the amorphous alloy is obtained by adding a rare earth element Tb into FeCo BSiNb system. Compared with the prior art, the iron-based bulk amorphous soft magnetic alloy prepared by industrial material has bigger amorphous formation capability and excellent soft magnetic performance; the diameter of the prepared amorphous bar material is 2mm-3mm, the saturation magnetization strength is 0.69 T-0.92 T, and the coercive force is 2.1A / m-3.8 A / m, which are relatively row compared with other doped rare-earth elementsystems. The preparation method is simple and has lower cost. The iron-based bulk amorphous soft magnetic alloy can be used as a core of a magnetic sensor and is applied to fields such as information, communication and the like.

Description

technical field [0001] The invention relates to the field of amorphous alloys, in particular to a FeCoBSiNbTb series bulk amorphous alloy material with excellent soft magnetic properties prepared from industrial raw materials and a preparation method thereof. Background technique [0002] Amorphous alloys are also called glassy alloys, which are usually prepared under extremely harsh conditions. The molten metal alloy is cooled at a faster cooling rate, and the formation and growth of crystal nuclei are inhibited during the rapid cooling process. , thus directly solidifying to form a long-range disordered amorphous alloy in structure. In 1938, Kramer reported for the first time that the amorphous film was successfully prepared by evaporative deposition (reference 1: J. Karmer, Z. Phys., 106 (1937) 675), and soon Brenner et al. adopted the method of electrodeposition Ni-P, Co-P amorphous alloy films have been prepared, and are used as surface coatings for metal surface prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153
Inventor 沈宝龙付英姚乐毅
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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