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A kind of iron-silicon-boron amorphous nanocrystalline composite microsphere material and its preparation method

A technology of amorphous nanocrystals and composite microspheres, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of difficulty in controlling the size of crystallized precipitated phase structure, varying mechanical and magnetic properties, and complex processes, etc., to achieve The effect of active control process, large amorphous critical size, and simple process flow

Active Publication Date: 2020-11-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe-Si-B amorphous alloy is relatively small due to the relatively small critical size of amorphous formation. At present, only water (gas) atomization method is used to prepare amorphous powder and strip method is used to prepare amorphous strips. The preparation technology of amorphous microsphere materials However, there are few reports; amorphous nanocrystalline composite materials are produced by thermal (such as annealing) crystallization of amorphous materials, electric / magnetic crystallization and other technologies. During the crystallization process, due to the annealing temperature, electric / magnetic field The difference in variables such as the crystallization and precipitation phases makes it difficult to control the structure and size of the crystallized precipitates, which ultimately causes the mechanical and magnetic properties of the materials to vary widely.
Moreover, the above-mentioned preparation of iron-based amorphous and nanocrystalline materials involves many procedures and relatively complicated processes, and there are almost no reports on the in-situ generation of Fe-Si-B amorphous and nanocrystalline composites.

Method used

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  • A kind of iron-silicon-boron amorphous nanocrystalline composite microsphere material and its preparation method
  • A kind of iron-silicon-boron amorphous nanocrystalline composite microsphere material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, a FeSiB amorphous nanocrystalline composite microsphere material is designed with an alloy composition of Fe 78Si 9 B 13 (at.%), calculate and weigh the corresponding proportioning mass of each element according to the atomic percentage;

[0031] Put the prepared raw materials into a vacuum arc melting device, the melting atmosphere is an inert gas Ar gas, the melting current is 130A, and the time is 15 minutes;

[0032] Put the obtained master alloy into a quartz test tube with a round hole at the bottom, and a small hole with a diameter of 0.2 mm at the bottom of the test tube, and install the test tube at the center of the heating coil inside the drop tube cavity;

[0033] Vacuum the drop tube cavity to 5.0×10 -5 After Pa, backfill the mixed gas of high-purity He and Ar 1:1 to 0.1Mpa.

[0034] The sample is melted and superheated at 200K by high-frequency induction melting equipment, and He gas is blown into the test tube to cause the alloy me...

Embodiment 2

[0037] In this embodiment, a FeSiB amorphous nanocrystalline composite microsphere material is designed with an alloy composition of Fe 75 Si 12 B 13 (at.%), calculate and weigh the corresponding proportioning mass of each element according to the atomic percentage;

[0038] Put the prepared raw materials into the vacuum arc melting device, the melting atmosphere is inert gas Ar gas, the melting current is 120A, and the time is 20min;

[0039] Put the obtained master alloy into a quartz test tube with a round hole at the bottom, and a small hole with a diameter of 0.1 mm at the bottom of the test tube, and install the test tube at the center of the heating coil inside the drop tube cavity;

[0040] Vacuum the drop tube cavity to 1.0×10 -5 After Pa, backfill the mixed gas of high-purity He and Ar 1:1 to 0.1Mpa.

[0041] The high-frequency induction melting device is used to heat the sample to melt and overheat to 50K, and He gas is blown into the test tube to make the alloy...

Embodiment 3

[0043] In this embodiment, a FeSiB amorphous nanocrystalline composite microsphere material is designed with an alloy composition of Fe 76 Si 10 B 14 (at.%), calculate and weigh the corresponding proportioning mass of each element according to the atomic percentage;

[0044] Put the prepared raw materials into the vacuum arc melting device, the melting atmosphere is inert gas Ar gas, the melting current is 140A, and the time is 5 minutes;

[0045] Put the obtained master alloy into a quartz test tube with a round hole at the bottom, and a small hole with a diameter of 0.6 mm at the bottom of the test tube, and install the test tube at the center of the heating coil inside the drop tube cavity;

[0046] Vacuum the drop tube cavity to 2.0×10 -4 After Pa, backfill the mixed gas of high-purity He and Ar 1:1 to 0.1Mpa.

[0047] The high-frequency induction melting device is used to heat the sample to melt and overheat to 300K, and He gas is blown into the test tube to make the ...

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Abstract

The invention belongs to the technical field of iron-based amorphous nanocrystalline alloys, and specifically discloses an iron-silicon-boron amorphous nanocrystalline composite microsphere material and a preparation method. The selected alloy component is Fe. x Si y B z , where x, y, and z are the atomic percentages of the corresponding components, x=75~78, y=9~12, z=100‑x‑y, using the rapid solidification preparation method of drop tube without container, by weighing It is prepared by the steps of batching, smelting the master alloy, installing the sample, vacuuming, heating and blowing, collecting particles and particle screening. The method is easy to obtain the raw materials, the amorphous preparation process is simple, and the amorphous critical size is large. The prepared amorphous nanocrystalline composite microsphere material has the advantages of high strength, hardness, wear resistance and corrosion resistance, and can be applied to amorphous coatings. , induction components, precision instruments, precision machining technology and other fields.

Description

technical field [0001] The invention belongs to the technical field of iron-based amorphous and nanocrystalline alloys, and in particular relates to an iron-silicon-boron amorphous and nanocrystalline composite microsphere material and a preparation method thereof. Background technique [0002] Amorphous state, as a special form of matter in nature, compared with crystals, their atoms and molecules do not show periodicity and translational symmetry in spatial arrangement, so there is no long-range ordered structure. Amorphous alloy is an alloy material with both liquid and solid, glass and metal characteristics. Its preparation process is obtained by rapid solidification of high-temperature melt, thereby inhibiting the crystallization nucleation of the melt. Due to the unique microstructure of amorphous alloys, it exhibits special physical and chemical properties and excellent mechanical properties different from traditional crystalline alloy materials, so it has become a me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/02B22F9/08B22F1/00
CPCC22C45/02C22C33/003B22F9/082B22F1/054B22F1/065
Inventor 王海鹏张彭超魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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