Special anti-nuclear ceramic coating for metal surface

Abstract

The utility model discloses a special anti-nuclear ceramic coating for a metal surface. The special anti-nuclear ceramic coating comprises an anti-oxidation layer, an anti-nuclear corrosion layer and a wear-resistant layer, the anti-oxidation layer is a high-entropy metal ceramic coating and is used for improving the high-temperature resistance of the coating; the anti-nuclear corrosion layer is a YSZ ceramic coating and is used for improving the lead-bismuth alloy corrosion resistance of the coating; and the wear-resistant layer is a SiC ceramic coating and is used for improving the wear resistance of the coating. The anti-oxidation characteristic of the high-entropy metal ceramic coating, the nuclear corrosion resistance of the YSZ ceramic coating and the wear resistance of the SiC ceramic coating are utilized, so that the anti-oxidation ceramic coating is particularly suitable for protection of a nuclear reactor cooling system, a high-temperature part, lead-bismuth alloy processing equipment and the like in extreme environments.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coating technical field relates to a metal surface special anti-nuclear ceramic coating. BACKGROUND

[0002] In the field of nuclear energy, especially in the nuclear reactor system with high-temperature liquid lead-bismuth alloy (such as lead-based reactor) as coolant or working medium, the metal component substrate faces a series of extreme environmental challenges such as high temperature, high radiation, strong corrosion, etc. Traditional metal materials are difficult to meet the demand of long-term stable operation. Therefore, it is necessary to develop a new special anti-nuclear ceramic coating. UTILITY MODEL CONTENT

[0003] The utility model discloses a metal surface special anti-nuclear ceramic coating, which combines oxidation resistance, nuclear corrosion resistance and wear resistance through a three-layer structure design, providing strong protection for the application of metal components in the field of nuclear energy.

[0004] To achieve the above-mentioned purpose, the utility model provides a metal surface special anti-nuclear ceramic coating, the ceramic coating includes an oxidation-resistant layer, a nuclear corrosion-resistant layer and a wear-resistant layer, the nuclear corrosion-resistant layer is located between the oxidation-resistant layer and the wear-resistant layer; the oxidation-resistant layer is a high-entropy metal ceramic coating, which is used to improve the high-temperature resistance of the coating; the nuclear corrosion-resistant layer is a YSZ ceramic coating, which is used to improve the lead-bismuth alloy corrosion resistance of the coating; the wear-resistant layer is a SiC ceramic coating, which is used to improve the wear resistance of the coating.

[0005] Preferably, the high-entropy metal ceramic coating is an AlCoCrNiReO coating.

[0006] Preferably, the thickness of the oxidation-resistant layer is 5-30 μm.

[0007] Preferably, the thickness of the nuclear corrosion-resistant layer is 30-50 μm.

[0008] Preferably, the thickness of the wear-resistant layer is 5-10 μm.

[0009] Preferably, the oxidation-resistant layer is close to the metal matrix (such as tungsten alloy, iron-based high-temperature alloy and nickel-based high-temperature alloy).

[0010] Preferably, the oxidation-resistant layer is coated on the metal matrix, the nuclear corrosion-resistant layer is coated on the oxidation-resistant layer, and the wear-resistant layer is coated on the nuclear corrosion-resistant layer.

[0011] The metal surface special anti-nuclear ceramic coating of the present application should be coated before service. The coating is composed of three layers, each of which is optimized for specific environmental challenges. The antioxidant layer, as the innermost layer of the coating, adopts a high-entropy metal ceramic coating. The high-entropy metal ceramic coating has good oxidation resistance and a thermal expansion coefficient between pure metal and ceramic. The main role is to improve the oxidation resistance of the coating in high temperature environment, and better connect the metal matrix part and the anti-nuclear corrosion ceramic layer; the anti-nuclear corrosion layer is located above the antioxidant layer, which adopts a YSZ ceramic coating. The YSZ ceramic coating has good corrosion resistance and thermal stability, especially in strong corrosive media such as lead-bismuth alloy. The main role of this layer is to protect the metal matrix from corrosion by lead-bismuth alloy and ensure the safe and stable operation of the nuclear reactor system; the wear-resistant layer is located on the outermost layer of the special anti-nuclear ceramic coating, which adopts a SiC ceramic coating. SiC is an ideal wear-resistant material, and the main role of this layer is to improve the wear resistance of the coating to prevent the metal matrix from being worn during service due to mechanical impact, thereby further prolonging the service life of the metal part.

[0012] The present application utilizes the oxidation resistance of high-entropy metal ceramic coating, the anti-nuclear corrosion properties of YSZ ceramic coating and the wear resistance of SiC ceramic coating, and is particularly suitable for protection in extreme environments such as nuclear reactor cooling systems, high temperature components, lead-bismuth alloy processing equipment, etc.

[0013] Compared with the prior art, the beneficial effects of the technical scheme of the present application are: the present application combines oxidation resistance, anti-nuclear corrosion and wear resistance together through the design of three-layer structure, providing strong protection for the application of metal parts in the field of nuclear energy. The research and application of this coating technology not only helps to improve the safety and reliability of nuclear reactor systems, but also lays a solid foundation for the further development of nuclear energy technology. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure of the present application is shown in the figure;

[0015] In the figure: 1. antioxidant layer, 2. anti-nuclear corrosion layer, 3. wear-resistant layer. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0017] As Figure 1As shown, the utility model provides an embodiment: a kind of metal surface special anti-nuclear ceramic coating, the ceramic coating includes oxidation resistance layer 1, anti-nuclear corrosion layer 2 and wear-resistant layer 3;Oxidation resistance layer 1 is high-entropy metal ceramic coating, for improving the high-temperature performance of coating;Anti-nuclear corrosion layer 2 is YSZ ceramic coating, for improving the corrosion resistance of coating lead bismuth alloy;Wear-resistant layer 3 is SiC ceramic coating, for improving the wear resistance of coating.

[0018] Preferably, the oxidation resistance layer is AlCoCrNiReO high-entropy metal ceramic coating prepared by magnetron sputtering (Liu H, Liang Z, Jiang Y, et al. Study of high-entropy oxide diffusion barrier and diffusion resistance mechanism in high-temperature protective coatings [J]. Journal of Materials Research and Technology, 2024, 30:5557-5568.), and the coating thickness is 5 μm.

[0019] Preferably, the anti-nuclear corrosion layer is YSZ ceramic coating prepared by thermal spraying (Morelli S, Testa V, Bolelli G, et al. CMAS corrosion of YSZ thermal barrier coatings obtained by different thermal spray processes [J]. Journal of the European Ceramic Society, 2020, 40(12):4084-4100.), and the coating thickness is 50 μm.

[0020] Preferably, the wear-resistant layer is SiC ceramic coating prepared by thermal spraying (Memon H, Romero AR, Derelizade K, et al. A new hybrid suspension and solution precursor thermal spray for wear-resistant silicon carbide composite coatings [J]. Materials & Design, 2022, 224:111382.), and the coating thickness is 5 μm.

[0021] Preferably, the oxidation resistant layer is proximate to the metal substrate (tungsten alloy, iron-based superalloy, or nickel-based superalloy).

[0022] It is apparent for the experts in the field that the essence of the present application is far from the specific details of the above exemplary embodiments. It is entirely possible to realize this application in various specific ways without deviating from its core concept or basic technical features. Therefore, these embodiments should be considered as merely exemplary in nature and not as a limitation on the scope of protection. The true scope of the present application is defined by the appended claims, not the foregoing detailed description. Our intention is to cover all suitable technical variations and innovations through the claims described and their broadest possible meaning. At the same time, it should be made clear that any reference signs in the claims should not be interpreted as a narrow limitation on the scope of protection of the claims.

Claims

1. A special anti-nuclear ceramic coating for metal surfaces, characterized in that, It includes an anti-oxidation layer, an anti-nuclear corrosion layer, and a wear-resistant layer. The anti-nuclear corrosion layer is located between the anti-oxidation layer and the wear-resistant layer. The anti-oxidation layer is a high-entropy metal-ceramic coating, which is used to improve the coating's high-temperature resistance. The anti-nuclear corrosion layer is a YSZ ceramic coating, which is used to improve the coating's resistance to lead-bismuth alloy corrosion. The wear-resistant layer is a SiC ceramic coating, which is used to improve the coating's wear resistance. The antioxidant layer is located close to the metal substrate.

2. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The high-entropy metal-ceramic coating is an AlCoCrNiReO coating.

3. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The thickness of the antioxidant layer is 5-30 μm.

4. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The thickness of the anti-nuclear corrosion layer is 30-50 μm.

5. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The thickness of the wear-resistant layer is 5-10 μm.

6. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The metal matrix is ​​a tungsten alloy, an iron-based high-temperature alloy, or a nickel-based high-temperature alloy.

7. The special anti-nuclear ceramic coating for metal surfaces according to claim 1, characterized in that, The antioxidant layer is coated on the metal substrate, the anti-nuclear corrosion layer is coated on the antioxidant layer, and the wear-resistant layer is coated on the anti-nuclear corrosion layer.

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