Preparation method and device of composite material containing high-entropy alloy coating

Abstract

The invention discloses a preparation method of a composite material containing a high-entropy alloy coating. The preparation method comprises the following steps that (1) oxides or the elementary substance of a high-entropy alloy pivotal element and aluminum powder are blended to obtain a thermite; (2) the thermite obtained in the step (1) is placed into a thermit reactor, the thermite is ignited, thermit reaction is activated to obtain alloy melt, and after stirring, rolling, flowing, layering and standing are performed, bottom layer high-entropy alloy melt and upper layer aluminum oxide slag are obtained; and (3) the bottom layer high-entropy alloy melt obtained in the step (2) is atomized into high-entropy alloy molten drops through a spraying and coating device, and the drops are sprayed and coated on the surface of a to-be-coated substrate, so that the composite material containing the high-entropy alloy coating is obtained. The invention further provides a device used for the preparation method. The whole technological process is ingenious in design and concept, and the preparation process is low in energy consumption, simple in step and easy to operate.

Description

technical field [0001] The invention belongs to the field of alloy materials, and in particular relates to a preparation method and a device of a composite material containing an alloy coating. Background technique [0002] High-entropy alloys are broadly defined as solid solution alloys of equal (nearly) atomic ratio composed of five or more elements mixed. The alloy phase structure is simple and has properties such as high strength, high hardness, good wear resistance, and oxidation resistance. High-entropy alloys are increasingly becoming the preferred materials for the preparation of excellent composite materials due to their excellent properties such as corrosion resistance and corrosion resistance. [0003] Since there are at least five components of high-entropy alloys, and there are potential differences between components, it is difficult to prepare coatings with uniform thickness by electroplating and electroless plating. At present, the main methods of preparing h...

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Problems solved by technology

[0003] Since there are at least five components of high-entropy alloys, and there are potential differences between components, it is difficult to prepare coatings with uniform thickness by electroplating and electroless plating. At present, the main methods of preparing high-entropy alloy coatings at home and abroad are Researches include laser cladding, magnetron sputtering, thermal spraying, etc., but these methods have certain limitations, such as: complex preparation process, high equipment requirements, high energy consumption, etc.

In particular, these methods are difficult to prepare large thick coatings, and with the increasing application of large armor plates, heat-resistant and wear-resistant ship decks, large molds, and corrosion-resistant containers, functional multilayer composite materials with large-area thick coatings urgent need

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