Iron-silicon-boron amorphous nanocrystalline composite microsphere material and preparation method thereof

Abstract

The invention belongs to the technical field of iron-based amorphous nanocrystalline alloys, and particularly discloses an iron-silicon-boron amorphous nanocrystalline composite microsphere material and a preparation method thereof. The selected alloy component is FexSicyBz, wherein x, y and z are atomic percentages of corresponding components, the x is equal to 75-78, the y is equal to 9-12, andthe z is equal to 100-x-y. The drop tube without container rapid solidification preparation method is adopted and comprises the following steps of weighing and preparation, master alloy smelting, sample installing, vacuumizing, heating and blowing, particle collecting, particle screening and the like, and an alloy microsphere with the grain diameter d being less than or equal to 120 microns are screened and collected. The method has the advantages that raw materials are easy to obtain, the amorphous preparation process flow is simple, the amorphous critical dimension is large, the prepared amorphous nanocrystalline composite microsphere material has the advantages of high strength, high hardness, wear resistance, corrosion resistance and the like, and the material can be applied to the fields of amorphous coatings, sensing elements, precision instruments, precision processing technologies and the like.

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...

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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.

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