Method for preparing solid amorphous alloy thin strips with controllable microstructures

Abstract

The invention relates to a method for preparing solid amorphous alloy thin strips with controllable microstructures. The method is characterized by specifically comprising the steps that first, solid amorphous alloy thin strip samples at different alloy melt temperatures are prepared; second, the three-dimensional structures of atomic clusters in the solid amorphous alloy thin strips corresponding to different alloy melt temperatures are subjected to characterization by a transmission electron microscope; third, atomic cluster structure characteristics and the preparation temperatures of the solid amorphous alloy thin strips are related; fourth, the atomic cluster structures of alloy melt are selected and solidified to the solid amorphous alloy thin strips rapidly. According to the method, the microstructures of the solid amorphous alloy thin strips can be effectively controlled to achieve the designability and the controllability of the microstructures of the solid amorphous alloy thin strips and obviously improve the macroscopic physical performance of the solid amorphous alloy thin strips. The method for preparing the solid amorphous alloy thin strips with the controllable microstructures has the characteristics of being simple and convenient to implement, high in efficiency, low in cost, high in controllability and repeatability and high in technical reliability and the like, and is suitable for being widely applied in the technical field of preparation of metal functional materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal functional materials, and in particular relates to a preparation method of a solid amorphous alloy strip with controllable microstructure. Background technique [0002] Metal alloys in a liquid state are not divided into anions and cations like water and other organic liquids, but form some very small atomic clusters. The size, geometry and characteristics of atomic clusters show obvious differences with the alloy composition and alloy melt temperature. The heating process of the alloy melt is the process of reducing the size of the atomic clusters, on the contrary, the cooling process of the alloy melt is the process of increasing the size of the atomic clusters. When the temperature rises, the atomic clusters with poor stability first decompose into smaller atomic clusters with better stability. The difference in the number of atoms may lead to changes in the geometry of the atomi...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the three-dimensional image obtained by tilting the sample around a single tilt axis will be distorted along the direction parallel to the tilt axis.

The main disadvantage of this method is that this method is only suitable for samples with an original thickness greater than 50 microns

The main disadvantage of this method is: this method is only applicable to the deposition preparation method, and cannot be used for the high-speed planar flow continuous casting method.

The main reason for the inability to control the microstructure of solid amorphous alloy ribbons is the lack of a method to establish a direct correlation between the atomic cluster structure of solid amorphous alloy ribbons and the temperature of the alloy melt, resulting in neither understanding the microstructure of solid amorphous alloys. characteristics, and do not know what are the main factors affecting the microstructure of solid amorphous alloys, especially the influence of alloy melt temperature on the microstructure of solid amorphous alloy strips

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