A high-entropy reinforced amorphous alloy composite material and its preparation method

Abstract

The invention belongs to the technical field of composite materials and their preparation, and relates to a high-entropy reinforced amorphous alloy composite material and a preparation method thereof: the composite material is made of Cr-Fe-Ni-Ta-Mo-V high-entropy alloy phase reinforced Co-Fe ‑Ta‑La‑B amorphous alloy matrix, the volume of the high-entropy phase accounts for 0.1% to 1% of the total volume of the composite material, and the size of the high-entropy alloy reinforcement phase is 30-80 μm; the amorphous alloy matrix contains: 15% to 25% Fe, 2% to 10% Ta, 11% to 17% La, 15% to 25% B, and the balance is Co; the high-entropy alloy reinforcement phase contains 15% to 25% by atomic percentage Fe, 10% to 20% Ni, 15% to 25% Ta, 7% to 16% Mo, 10% to 20% V, and the balance is Cr; it is prepared by laser additive manufacturing technology, and finally obtains a block with high entropy enhancement For amorphous alloy composites, the plasticity and toughness of composites can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of composite materials and their preparation, and relates to a high-entropy reinforced amorphous alloy composite material and a preparation method thereof. Background technique [0002] Compared with traditional bulk crystalline materials, bulk amorphous alloys have high fracture strength and yield strength, high hardness, high specific strength and high elastic limit, and can be used as high-performance structural materials. But the fly in the ointment is that the macroscopic plasticity of amorphous alloys, especially the poor tensile plasticity, has always been the bottleneck of its application as an excellent structural material. People have improved the plasticity of amorphous alloys by developing new amorphous alloy components with high plastic deformation ability, adding a second phase to the amorphous alloy matrix, and surface treatment. For example, finding an amorphous alloy composition with a high...

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Problems solved by technology

At the same time, the amorphous forming ability of the alloy is also closely related to the composition of the alloy. At present, it is difficult to find alloys with high amorphous forming ability and high plastic deformation ability.

Therefore, the problem of plasticity of amorphous alloys cannot be completely solved by developing alloys with large Poisson's ratios

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