Preparation method for amorphous alloy/pure copper layered composite material

Abstract

The invention discloses a preparation method for an amorphous alloy / pure copper layered composite material. The preparation method comprises the following steps of: performing rheological behavior processing on an amorphous alloy through a cold-liquid-phase region temperature, enabling a micro bulge part of an amorphous alloy connecting surface to generate plastic deformation to increase a close contact area, and activating diffusion among atoms to change metal key connection into firm metallurgical connection; connecting the amorphous alloy treated in step to fine copper under control of connecting technological parameters, preserving the heat and diffusing, diffusing atoms in an interface region on which the amorphous alloy is in contact with the pure copper, improving diffusion connection reliability of dissimilar materials, reducing formation of defects, improving connecting strength of the layered material, and finally obtaining the amorphous alloy / pure copper layered composite material. The preparation method has the characteristics of adopting matrix and keeping an amorphous state and being wide in scope of application.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of an amorphous alloy / pure copper layered composite material. Background technique [0002] The room temperature brittleness of amorphous alloys severely restricts their wide application as high-strength engineering materials due to the limitation of deformation mechanism. In order to improve the room temperature plasticity and fracture toughness of amorphous alloys and expand the application value of amorphous alloys, as early as the 1980s, foreign scholars began to use electroplating to process amorphous alloy strips to obtain amorphous / metal layered composite materials. The amorphous / metal layered composite material obtained by compounding metal and amorphous alloy strips forms a large number of shear bands due to the restriction of the metal during the deformation process, which inhibits the growth of cracks and improves the room temperature fracture brittleness....

AI Technical Summary

Problems solved by technology

Although the spraying process can make the amorphous and metal tightly combined (at the atomic level), as the thickness of the coating increases, the bonding between the metal and the metal layer in the coating is relatively loose (compared with the interior of the alloy). Under the action of load, the coating is easy to peel off, reducing its overall performance, so it cannot be used as a force-bearing structural member

In recent years, scholars have begun to use the characteristics of the supercooled liquid region of amorphous alloys to successfully obtain amorphous alloy / metal layered composites with good mechanical properties through co-pressing, semi-solid forging, and explosive welding. However, explosive welding and The process of semi-solid forging method is complicated, and it is easy to induce the crystallization of the amorphous alloy at the interface during the processing and forming process, which ultimately affects the overall mechanical properties of the composite material

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