Soft-magnetic high-entropy block amorphous alloy FeCoNiMB and preparation method thereof

An amorphous alloy and soft magnetic technology, applied in the field of FeCoNiMB high-entropy bulk amorphous alloy and its preparation, to achieve the effect of expanding the application field, high strength, and good thermal stability

Active Publication Date: 2015-09-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zuo et al. from Beijing University of Science and Technology reported Fe with a body-centered cubic structure. 25 co 25 Ni 25 Al 25 High-entropy alloys, which show a saturation magne

Method used

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  • Soft-magnetic high-entropy block amorphous alloy FeCoNiMB and preparation method thereof
  • Soft-magnetic high-entropy block amorphous alloy FeCoNiMB and preparation method thereof
  • Soft-magnetic high-entropy block amorphous alloy FeCoNiMB and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Fe 25 co 25 Ni 25 Si 7.5 B 17.5

[0025] Step 1. Ingredients

[0026] Fe, Co, Ni, B and Si raw materials with a purity greater than 99.5wt% are used for weighing and proportioning according to the nominal composition;

[0027] Step 2: Master alloy ingot smelting

[0028] Mix the weighed metal raw materials into a water-cooled copper crucible of a non-consumable arc melting furnace, and repeatedly smelt them 4 times under an Ar gas atmosphere to obtain an alloy ingot with a uniform composition;

[0029] Step 3: Preparation of amorphous rod

[0030] The master alloy ingot is crushed and put into a quartz tube with a nozzle diameter of about 0.5 mm. The master alloy is heated to a molten state by induction melting in an Ar gas atmosphere, and then the alloy liquid is sprayed onto a high-speed rotating copper roller with high-pressure gas. , throw the strip at a speed of 35m / s to produce an alloy strip with a width of about 2mm and a thickness of about 20...

Embodiment 2

[0033] Example 2: Fe 25 co 25 Ni 25 Si 10 B 15

[0034] The specific implementation steps are the same as in Example 1, and the critical diameter of the high-entropy bulk amorphous alloy is finally prepared with a critical diameter of 1 mm. The relevant data are listed in Table 1.

Embodiment 3

[0035] Example 3: Fe 25 co 25 Ni 25 P 5 Si 7.5 B 12.5

[0036] Step 1. Ingredients

[0037] Using Fe, Co, Ni, Si, B and Fe with a purity greater than 99.5wt% 3 P raw materials are weighed and proportioned according to the nominal composition;

[0038] Step 2: Master alloy ingot smelting

[0039] Preparation of master alloy ingots by medium frequency or high frequency induction melting: put the raw materials into the crucible of induction melting furnace, and melt them three times under Ar gas atmosphere to obtain master alloy ingots with uniform composition;

[0040] All the other implementation steps are the same as steps three and four in embodiment 1.

[0041] The final prepared high-entropy bulk amorphous alloy has a critical diameter of 1.5 mm, and the relevant data are listed in Table 1.

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Abstract

The invention provides a soft-magnetic high-entropy block amorphous alloy FeCoNiMB. M represents at least one of P, C and Si elements, and typical compositions include Fe25Co25Ni25Si7.5B17.5, Fe25Co25Ni25Si10B15, Fe25Co25Ni25P5C4Si6B10, Fe25Co25Ni25P12C8B5 and Fe25Co25Ni25P10C10B5. The saturation magnetization of the alloy is 0.80-0.87T, coercivity is 1.1-3.4A/m, and effective magnetic conductivity under 1kHz is 12500-19800. The invention further provides a preparation method of the soft-magnetic high-entropy block amorphous alloy. The preparation method includes preparing a master alloy ingot through arc melting or induction melting, and preparing an amorphous band and an amorphous bar by single-roll melt-spinning and copper-mold casting respectively. The technical blank in preparation of the soft-magnetic high-entropy block amorphous alloy is filled up, and the provided alloy has an application prospect of serving as a soft-magnetic functional device.

Description

technical field [0001] The invention relates to a FeCoNiMB (M represents at least one element among P, C and Si) high-entropy bulk amorphous alloy with soft magnetic properties and a preparation method thereof, belonging to the technical field of new materials and preparation thereof. Background technique [0002] Traditional alloy design methods basically use one or two elements as the main components, and then adjust the microstructure, structure or performance of the alloy to meet the application requirements by alloying other elements. In 2004, Ye Junwei and other scholars broke through the traditional alloy design framework and proposed a new alloy design concept of multi-principal alloy. Multi-principal alloys, or high-entropy alloys, initially refer to alloys composed of five or more principal elements in an equiatomic or approximate atomic ratio, and each component is between 5% and 35%. With the continuous development of high-entropy alloys, alloys currently compos...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C30/00C22C1/03H01F1/153
Inventor 张伟齐天龙李艳辉
Owner DALIAN UNIV OF TECH
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