Additional high-toughness Zr-based amorphous composite and preparation method thereof

Abstract

The invention relates to the field of high-mechanical-performance materials, in particular to an additional high-toughness Zr-based amorphous composite and a preparation method thereof. The additionalhigh-toughness Zr-based amorphous composite is mainly prepared from a Zr-based amorphous alloy and a second phase. According to the additional high-toughness Zr-based amorphous composite and the preparation method thereof, the second phase is added to an original amorphous alloy base body. The second phase stops extension of amorphous single shear bands and induces formation of more shear bands.On the premise of not reducing the fracture bending strength of the original alloy material, the bending fracture strain of the material is improved. Through the method provided by the invention, theoriginal characteristics of the material are improved from the material end, and there is no need to conduct surface treatment on molded products; moreover, except the mother alloy smelting step, there is no need to introduce extra working procedures, and the additional high-toughness Zr-based amorphous composite and the preparation method thereof are suitable for mass production.

Description

technical field [0001] The invention relates to materials with high mechanical properties in the fields of consumer electronics, precision devices (such as robots), medical equipment, aerospace and other applications, in particular to a high-toughness ultra-high-strength zirconium-based amorphous composite material and its preparation method . Background technique [0002] Amorphous alloys are named for their obvious structural differences from common crystalline materials. General materials exist in the form of crystals, and the characteristics of amorphous are long-range disorder (short-range order), metastable state (crystallization at a certain temperature), isotropic physical properties to a certain extent, no exact melting point, and glass transition temperature, etc. At the same time, because it has a similar structure to common glass, it has the characteristics of solid state, metal, and glass, so it is also called metallic glass (Metallic Glass). Because of its b...

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Problems solved by technology

[0004] Adding a second phase to prepare amorphous composites is a method to improve the toughness of amorphous alloys, but there is often a bonding (wettability) problem between the external phase and the amorphous matrix, which makes the interface strength between the second phase and the amorphous matrix lower.

In addition, the addition of external phase often requires a large volume fraction (greater than 40%) to achieve the toughening effect, which easily causes the problem of uneven distribution of external phase

Due to the different shapes of the external phases, for the fibrous, lamellar and three-dimensional skeleton-like second phases, it is often necessary to prepare amorphous composite materials by impregnation or hot pressing, which is not suitable for industrial production.

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