Amorphous alloy-gypsum composite board, preparation method and application thereof.

Abstract

The invention relates to an amorphous alloy-gypsum composite board, a preparation method and an application thereof. The amorphous alloy-gypsum composite board comprises an amorphous alloy strip layer and gypsum layers, wherein the amorphous alloy strip layer is clamped between the gypsum layers, and the whole composite board is integrally cast and formed. The preparation method comprises the following steps: firstly putting amorphous alloy into a mould, exerting certain pre-tensile stress on the amorphous alloy, adding water into gypsum powder and then pouring the mixture into the mould, releasing the pre-tensile stress after the board is formed and detaching the mold, so as to obtain the amorphous alloy-gypsum composite board. The amorphous alloy strip positioning accuracy is achieved, the integrity of the amorphous alloy strip and the gypsum is good, the binding force is strong, and the bending and cracking resistance of the gypsum is improved, the composite board has electromagnetic shielding performance, and meanwhile, the mechanical property and the electromagnetic shielding performance are high in designability.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to an amorphous alloy-gypsum composite board and a preparation method and application thereof. Background technique [0002] Compared with traditional crystalline alloy materials, amorphous alloys do not have periodicity and long-term procedures. The elastic modulus of amorphous alloy is close to that of traditional engineering metal materials, but its yield strength at room temperature is much higher than that of crystalline alloy materials with the same composition, high yield strength (~5GPa), low Young's modulus (generally the corresponding About 70% of the crystalline metal alloy) and large elastic strain limit (~2%) make it have extremely high elastic specific work. Based on its excellent mechanical properties, as well as excellent corrosion resistance, soft magnetic properties, hydrogen storage capacity and low magnetic loss, amorphous alloys have shown obvious ...

AI Technical Summary

Problems solved by technology

Due to the low amorphous formation ability of Fe-Si-B amorphous alloy, only amorphous thin strips can be produced when the single-roll spin quenching system is used, and the thickness is only tens of microns. The scale of the thin strip limits the Fe - The structural use of Si-B amorphous alloy, its strength is difficult to be utilized in practical engineering

[0004] Chinese invention patent CN102873938A introduces a preparation method of Fe-Si-B amorphous alloy-copper layered composite material, using a vacuum diffusion connection tester to weld Fe-Si-B amorphous alloy and copper by diffusion welding Composite materials are formed. The disadvantage of this technical solution is that the experimental conditions are harsh, the preparation is difficult, and it is easy to cause waste of amorphous alloy materials; the patent document of publication number CN102529227A discloses a patch made of iron-based amorphous / nanocrystalline strips The preparation method of the electromagnetic shielding composite material of layer, this material uses Fe 78 Si 9 B 13 or Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The tape is made of electromagnetic shielding material pasted on the surface of the butyl rubber film / carbon fiber / butyl rubber film sandwich structure

The preparation of electromagnetic shielding materials by combining amorphous alloy thin strips with metal, rubber and other base materials by welding and pasting has defects such as complex process, high cost, and poor integrity, which is not conducive to large-scale promotion and use in engineering. At the same time, amorphous alloy There is a huge difference in mechanical properties from rubber. On the one hand, the advantages of high strength of amorphous alloys cannot be fully utilized. In addition, the huge difference in deformation properties is likely to cause slippage in the interface layer between the two, resulting in separation of the interface and loss of combination.

Amorphous alloy-metal composite materials are made of amorphous alloys in the supercooled liquid phase region, and are connected by pressure and diffusion on the surface of copper atoms. First, in the preparation process, it is necessary to reach the glass transition temperature of Fe-Si-B (480-500 degrees Celsius), and the pressure can reach 70-90MPa at the same time, and it must be a vacuum atmosphere. The combination of amorphous and copper belongs to the metallurgical combination at the atomic level. On the one hand, this method cannot be mass-produced, or produce large-scale Amorphous alloy-copper composite materials, at the same time, because they belong to metal-metal composite materials, they are not the same as the combination of inorganic non-metal-amorphous

Because copper itself has relatively good strength, and its electrical and thermal conductivity are similar to that of amorphous itself, the application range of amorphous alloy-metal is very limited.

In addition, the cost of amorphous alloy-metal is high

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