A method for characterization of amorphous alloy microstructure 3D reconstructed samples based on 360° full viewing angle

Abstract

The invention relates to a 360-degree full-visual-angle-based characterization method for an amorphous alloy microstructural three-dimensional reconstructed sample. The method is characterized by specifically comprising the following steps: 1, preparing an amorphous solid alloy transmission electron microscope sample with a needle-shaped end part; 2, shooting two-dimensional transmission electron microscope images of the needle-shaped end part at a tilting angle of 360 degrees; 3, reconstructing a three-dimensional image through a series of the two-dimensional transmission electron microscope images. According to the characterization method disclosed by the invention, the shapes and the space distribution of atom clusters of an amorphous solid alloy material can be accurately characterized within a 360-degree full-visual-angle range, and a foundation is laid for building the relevance between an amorphous solid alloy microstructure and the macro-performance and realizing regulation and control over the amorphous solid alloy microstructure to further improve the macro-performance of the amorphous solid alloy material. The characterization method has the characteristics of low implementation cost, high efficiency, high operability and repetitiveness, high technical reliability and the like, and is suitable for being widely applied to the field of researches on amorphous solid alloys.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal functional materials, and in particular relates to a characterization method for a three-dimensional reconstructed sample of an amorphous alloy microstructure based on a 360° full viewing angle. Background technique [0002] All intrinsic macroscopic properties of a material are determined by the electronic band structure of the material, and the electronic band structure resulting from the overlapping and hybridization of electron orbitals between atoms is closely related to the arrangement of atoms in the material. The arrangement of atoms constitutes the basic structural unit of the material. Since changes in the arrangement of atoms will significantly change the energy band structure, amorphous solid alloys with the same composition but different structures can show completely different macroscopic properties. The alloy melt is composed of some very small atomic clusters. When the...

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Problems solved by technology

The main disadvantage of this method is: due to the shape of the thin film sample itself and the limitation of the tilt angle of the TEM goniometer, as the tilt angle increases, both the sample stage and the thin film sample will block the incident electron beam, which limits the stability of the sample. 2D TEM images can only be obtained within the allowed tilt angle

The main disadvantage of this method is that there are differences in the sample areas contained in the two-dimensional TEM images obtained by tilting the sample around multiple different orientations, and the information contained in the images is not completely from the same area.

[0005] In summary, although the microstructure of amorphous solid alloys is the basis for achieving their macroscopic properties, the regulation of the microstructure of amorphous solid alloys is one of the important ways to obtain high-quality solid amorphous alloy ribbons. There is still a lack of effective technical methods for the microstructure regulation of crystalline solid alloys, because the microstructure of amorphous solid alloys cannot be accurately characterized and analyzed, resulting in the lack of understanding of the influence of changes in preparation process parameters on the microstructure of amorphous solid alloys

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