A zirconium-based amorphous composite material with added high toughness and its preparation method

Abstract

The invention relates to the field of materials with high mechanical properties, in particular to an added high-toughness zirconium-based amorphous composite material and a preparation method thereof. The material is mainly made of zirconium-based amorphous alloy and a second phase. This application adds a second phase to the original amorphous alloy matrix. The existence of the second phase prevents the expansion of a single shear band in the amorphous, induces the formation of more shear bands, and does not reduce the fracture bending strength of the original alloy material. Under the premise of improving the bending fracture strain of the material, the method provided by the present invention improves the intrinsic properties of the material from the raw material side, does not need to carry out surface treatment on the formed product, and does not need to introduce additional processes except for the master alloy melting step , 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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