Nanocrystalline alloy coating and preparation thereof

Abstract

The invention relates to a nano-crystalline alloy coating layer and a preparation method thereof. Particularly, the invention relates to a nano-crystalline alloy coating layer, the components of which, expressed by atomic ratio, satisfy the relational expression: (Fe1-aM1a)100-x-y-z-Alpha-Beta-GammaCuxSiyBzM2AlphaM3BetaXGamma, wherein, M1 is one or both of Co and Ni, M2 is at least one of Nb, W, Ta, Zr, Hf, Ti and Mo, M3 is at least one of V, Cr, Mn, Al, Sc, Y, Au, Zn, Sn and Re, X is at least one of C, Ge, P, Ga, Sb, In, Be and As, a is more than or equal to 0 and less than or equal to 0.5, x is more than or equal to 0.1 and less than or equal to 3, y is more than or equal to 0 and less than or equal to 30, z is more than or equal to 0 and less than or equal to 25, and furthermore, y plus z is more than or equal to 5 and less than or equal to 30, Alpha is more than or equal to 0.1 and less than or equal to 30, Beta is more than or equal to 0 and less than or equal to 10 and Gamma is more than or equal to 0 and less than or equal to 10, the volume percent of nano-crystals contained in the nano-crystalline alloy coating layer is above 50 percent and the crystal size of the nano-crystals is below 100nm. The invention also relates to the application and a preparation method of the nano-crystalline alloy coating layer.

Description

technical field [0001] The invention belongs to the field of thermal spraying, and relates to a nanocrystalline alloy coating and its application and preparation method. Background technique [0002] Because of its unique structure and excellent material properties, amorphous alloys have attracted extensive attention from material scientists and the industry since their invention. At present, various amorphous materials have gradually moved towards practical use, especially amorphous soft magnetic alloys. Ribbon has been widely used in fields such as power and electronics. The preparation of amorphous alloy materials is restricted by the formation ability and cooling rate of amorphous alloys. For a long time, the product forms of amorphous alloys are mainly thin strips, filaments, powders, etc., and the thickness or diameter is only tens of microns. It is difficult to popularize and apply it in a wider range, and its performance advantages are far from being fully utilized....

AI Technical Summary

Problems solved by technology

However, there is no specific report on the electromagnetic shielding performance of nanocrystalline coatings.

[0005] The current technology related to nanocrystalline coatings mainly has the following deficiencies: (1) the process control of preparing nanocrystalline coatings is difficult, and due to the absence of elements that effectively inhibit the growth of crystal grains, overcrystallization is prone to occur during the preparation process; (2) Lack of development of electromagnetic shielding technology and application of nanocrystalline coatings

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