Cu-based bulk and amorphous alloy composite and preparation method thereof

Abstract

A Cu-based bulk and amorphous alloy composite and a preparation method thereof belong to the field of material science. The Cu-based bulk and amorphous alloy composite comprises the following ingredients by percent: 40-50% of Cu, 40-50% of Zr, 0-10% of Al and 0-7% of M, wherein M is any one of Nb, Hf and Y. After repeated smelting in a smelting furnace copper crucible, on dependency of self-weight, a self-flowing pouring method is adopted to prepare the Cu-based bulk and amorphous alloy composite. The problems of room-temperature brittleness and strain softening of amorphous alloy are effectively solved, and favorable tensile plasticity is achieved.

Description

technical field [0001] The invention belongs to the field of material science, and mainly relates to a copper-based bulk amorphous alloy composite material and a preparation method thereof. Background technique [0002] Bulk amorphous alloys suffer from room temperature brittleness and strain softening defects, which severely limit their use as engineering materials. In order to solve the problems of room temperature brittleness and strain softening of amorphous alloys, different types of amorphous composite materials have been developed. There are mainly two types of existing amorphous composite materials: one is composite materials formed by endogenous strong and tough phases, and the other is composite materials formed by external strong and tough phases. Due to the poor connection strength between the external strengthening and toughness phase and the amorphous alloy matrix and the complexity of the composite material preparation process, the external strengthening and ...

AI Technical Summary

Problems solved by technology

In the currently developed Ti-based and Zr-based amorphous alloy composite materials, although they exhibit certain compressive plasticity, there is a problem of strain softening.

In CuZr-based amorphous composites, martensitic transformation is induced to produce plasticity by adding noble metal Ta or requiring pre-deformation of the sample, but the addition of noble metals increases the cost and the complexity of the pre-deformation process, prompting CuZr-based composites to also have certain limitations

In addition, because the suction casting method is used to prepare amorphous composite materials, its plasticity is low, and the work hardening ability is also poor. The technical problem is that the cooling speed of the suction casting method is too fast, which is not conducive to the in-situ formation of strong and tough phases.

Images