The Fe-based amorphous alloy has a long-range disordered, short-range ordered atomic structure, and has no defects such as dislocations and grain boundaries in the crystal, so it has high strength and hardness. However, restricted by the amorphous formation temperature, preparation process and room temperature brittleness, the current critical dimension of iron-based amorphous alloys is only at the centimeter level, which severely restricts its promotion and application as engineering materials. Studies have found that the strength of iron-based amorphous alloys has a size effect, and the iron-based amorphous alloys close to the nanometer scale have higher strength and elastic limit than the bulk amorphous alloys of the same composition. The preparation of iron-based amorphous coating on the surface of the material can not only solve the problems of its amorphous forming ability and room temperature brittleness, break through the "bottleneck" in the promotion and application of iron-based amorphous alloys, and can give full play to the advantages of iron-based amorphous alloys. Excellent properties such as magnetic properties, mechanical properties, wear resistance, corrosion resistance, etc., improve the surface properties of the material, and significantly expand the application range of iron-based amorphous alloys.

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