Carbon fiber composite material with AlXNiY / high-entropy alloy coating sprayed on surface and preparation method

Abstract

The invention discloses a carbon fiber composite material with the surface sprayed with an AlXNiY / high-entropy alloy coating and a preparation method. The carbon fiber composite material comprises a high-entropy alloy surface layer, a transition alloy coating and a carbon fiber composite material layer from outside to inside. The preparation method of the 3D composite material comprises the following steps: step 1, pretreating the matrix; step 2, surface roughening; and thirdly, plasma spraying is conducted. The method has the beneficial effects that the advantages of the carbon fiber composite material and the high-entropy alloy are well combined; according to the carbon fiber composite material driving roller subjected to high-entropy alloy coating spraying treatment, a novel plasma spraying technology is adopted, and the characteristics of excellent strength, wear resistance and light weight are shown. Compared with a traditional metal roller, the carbon fiber composite material roller is outstanding in dynamic balance and can keep stable rotation at an ultrahigh speed, so that the transmission efficiency is greatly improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to a carbon fiber composite material and a preparation method thereof, and in particular to a surface sprayed Al X Ni Y Carbon fiber composite material with / high entropy alloy coating and preparation method. Background Art

[0002] At present, carbon fiber composite materials are a new type of material with superior performance. They have high tensile strength, which is 7 to 10 times that of steel with the same cross-section. At the same time, their lightweight characteristics make the density only one-fourth of ordinary steel. In addition, this material has excellent durability and can resist damage caused by chemical corrosion, harsh environment and climate change. It has a wide range of applications and greatly improves the bearing capacity, seismic resistance and durability of components.

[0003] However, the hardness of carbon fiber composites is relatively low, so applying a high entropy alloy coating on their surface can effectively enhance the surface hardness and wear resistance, complementing the advantages of the two materials, especially in the transmission rollers of mechanical equipment. However, it should be noted that the compatibility between carbon fiber composites and metal materials is relatively poor. When using chemical plating and sol-gel methods to prepare metal coatings, they often face problems such as insufficient strength and complex processes, which makes them unsuitable for large-scale promotion and application.

[0004] This patent proposes a new method for preparing a wear-resistant, high-temperature-resistant and conductive high-entropy alloy coating on the surface of a carbon fiber composite material. This method directly uses plasma spraying technology, but it should be noted that the surface of the carbon fiber composite material is covered with an epoxy resin layer. If the coating is sprayed directly on it, the heat generated by the molten high-entropy alloy powder may cause the resin layer to melt, thereby affecting the bonding strength between the coating and the substrate, and even failing to form an effective coating. Summary of the invention

[0005] The main purpose of the present invention is to solve the problem of low hardness of carbon fiber composite materials;

[0006] Another object of the present invention is to solve the problem that when a high melting point metal coating is directly sprayed on a carbon fiber composite material, the heat generated by the melted high entropy alloy powder causes the resin layer to melt, thereby affecting the bonding strength between the coating and the substrate, and even failing to form an effective coating;

[0007] In order to achieve the above-mentioned purpose and solve the above-mentioned problem, the present invention provides a surface spraying Al X Ni Y Carbon fiber composite material with / high entropy alloy coating and preparation method.

[0008] The surface spraying Al X NiY The carbon fiber composite material with a high entropy alloy coating includes a high entropy alloy surface layer, a transition alloy coating and a carbon fiber composite material layer from the outside to the inside.

[0009] The high entropy alloy surface layer is formed by spraying FeCoNiCrMo high entropy alloy powder with an equal molar ratio at a current of 500A, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the high entropy alloy surface layer is 228.32μm.

[0010] The transition alloy coating is formed by spraying AlNi alloy powder with equal molar ratio at 450A current, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the transition alloy coating is 750μm.

[0011] The thickness of the carbon fiber composite material layer is 25 mm, and the surface roughness of the outer surface of the carbon fiber composite material layer after treatment is 4.5 μm.

[0012] The surface spraying Al X Ni Y A method for preparing a carbon fiber composite material with a high entropy alloy coating, the method comprising the following steps:

[0013] Step 1: Matrix pretreatment: The carbon fiber composite material layer matrix is ​​soaked in acetone and concentrated sulfuric acid at 45° C. for 30 minutes to remove the epoxy resin on the surface of the carbon fiber composite material layer;

[0014] Step 2, surface roughening: Use 16# brown corundum sand to sandblast the surface of the carbon fiber composite material layer substrate, so that the surface roughness of the carbon fiber composite material layer after treatment reaches Ra=4.5μm;

[0015] Step 3, plasma spraying: using plasma spraying equipment, using an equal molar ratio of AlNi alloy powder as a transition alloy coating material, spraying to form a transition alloy coating with a thickness of 750 μm, and then spraying an equal molar ratio of FeCoNiCrMo high entropy alloy powder as a material on the transition alloy coating to form a high entropy alloy surface layer with a thickness of 228.32 μm.

[0016] The acetone and concentrated sulfuric acid in step 1 are commercially available pure acetone and pure concentrated sulfuric acid.

[0017] The transition alloy coating in step three adopts a spraying voltage of 50V, a spraying current of 450A, and a spraying distance from the spray gun nozzle to the substrate of 200-300mm; when preparing the high entropy alloy surface layer, the spraying current is 500A, the main gas pressure is 70PSI, the carrier gas pressure is 60PSI, the spraying speed is 400mm / min, and the spraying distance from the spray gun nozzle to the substrate is 200-300mm; the temperature of the carbon fiber composite material layer substrate is controlled by air cooling and the spraying speed and distance to alleviate the influence of thermal stress on the coating during the process.

[0018] The plasma spraying equipment in step 3 is a PRAXAIR3710 plasma spraying equipment set manufactured by Praxair in the United States for coating preparation.

[0019] Beneficial effects of the present invention:

[0020] The carbon fiber composite material with AlXNiY / high entropy alloy coating sprayed on the surface and the coating obtained in the preparation method provided by the present invention can reach a hardness of 740.3HV, and the transition alloy coating is firmly bonded, and the bonding strength reaches more than 17MPa, which well combines the advantages of the two materials of carbon fiber composite material and high entropy alloy; the carbon fiber composite transmission roller treated by high entropy alloy coating spraying adopts a new plasma spraying technology, showing superior strength, wear resistance and lightweight characteristics. Compared with traditional metal rollers, this carbon fiber composite roller has outstanding performance in dynamic balance and can maintain stable rotation at ultra-high speed, thereby greatly improving transmission efficiency and reducing energy consumption. In addition, the high entropy alloy characteristics of the coating further enhance its wear resistance and extend the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the longitudinal section of the carbon fiber composite material with AlXNiY / high entropy alloy coating sprayed on the surface according to the present invention.

[0022] Figure 2 It is a schematic cross-sectional view of a carbon fiber composite material with a surface sprayed with an AlXNiY / high entropy alloy coating according to the present invention.

[0023] Figure 3 This is a schematic diagram of a product produced by the method for preparing a carbon fiber composite material according to the present invention.

[0024] The annotations in the above figure are as follows:

[0025] 1. High entropy alloy surface layer 2. Transition alloy coating 3. Carbon fiber composite material layer. DETAILED DESCRIPTION

[0026] See also Figures 1 to 3 As shown:

[0027] The surface spraying Al X Ni Y The carbon fiber composite material with a high entropy alloy coating comprises a high entropy alloy surface layer 1, a transition alloy coating 2 and a carbon fiber composite material layer 3 from the outside to the inside.

[0028] The high entropy alloy surface layer 1 is formed by spraying FeCoNiCrMo high entropy alloy powder with an equal molar ratio at a current of 500A, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the high entropy alloy surface layer 1 is 228.32μm.

[0029] The transition alloy coating 2 is formed by spraying AlNi alloy powder with an equal molar ratio at a current of 450A, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the transition alloy coating 2 is 750μm.

[0030] The thickness of the carbon fiber composite material layer 3 is 25 mm, and the surface roughness of the outer surface of the carbon fiber composite material layer 3 after treatment is 4.5 μm.

[0031] The surface spraying Al X Ni Y A method for preparing a carbon fiber composite material with a high entropy alloy coating, the method comprising the following steps:

[0032] Step 1: pretreatment of the substrate: immersing the carbon fiber composite material layer 3 substrate in acetone and concentrated sulfuric acid at 45° C. for 30 minutes to remove the epoxy resin on the surface of the carbon fiber composite material layer 3;

[0033] Step 2: Surface roughening: Use 16# brown corundum sand to sandblast the surface of the carbon fiber composite material layer 3 substrate, so that the surface roughness of the carbon fiber composite material layer 3 after treatment reaches Ra=4.5μm;

[0034] Step 3, plasma spraying: using plasma spraying equipment, using an equal molar ratio of AlNi alloy powder as the material of the transition alloy coating 2, spraying to form a transition alloy coating 2 with a thickness of 750 μm, and then spraying an equal molar ratio of FeCoNiCrMo high entropy alloy powder as the material on the transition alloy coating 2 to form a high entropy alloy surface layer 1 with a thickness of 228.32 μm.

[0035] The acetone and concentrated sulfuric acid in step 1 are commercially available pure acetone and pure concentrated sulfuric acid.

[0036] The transition alloy coating 2 in step three adopts a spraying voltage of 50V, a spraying current of 450A, and a spraying distance from the spray gun nozzle to the substrate of 200-300mm; when preparing the high entropy alloy surface layer 1, the spraying current is 500A, the main gas pressure is 70PSI, the carrier gas pressure is 60PSI, the spraying speed is 400mm / min, and the spraying distance from the spray gun nozzle to the substrate is 200-300mm; the substrate temperature of the carbon fiber composite material layer 3 is controlled by air cooling and the spraying speed and distance to alleviate the influence of thermal stress on the coating during the process.

[0037] The plasma spraying equipment in step 3 is a PRAXAIR3710 plasma spraying equipment set manufactured by Praxair in the United States for coating preparation.

Claims

1. A surface sprayed Al X Ni Y / Carbon fiber composite material with high entropy alloy coating, characterized in that: From the outside to the inside, it includes a high entropy alloy surface layer, a transition alloy coating and a carbon fiber composite material layer.

2. A surface spraying Al according to claim 1 X Ni Y / Carbon fiber composite material with high entropy alloy coating, characterized in that: The high entropy alloy surface layer is formed by spraying FeCoNiCrMo high entropy alloy powder with an equal molar ratio at a current of 500A, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the high entropy alloy surface layer is 228.32μm.

3. A surface spraying Al according to claim 1 X Ni Y / Carbon fiber composite material with high entropy alloy coating, characterized in that: The transition alloy coating is formed by spraying AlNi alloy powder with equal molar ratio at 450A current, the spraying distance from the spray gun mouth to the substrate is 200-300mm, and the average thickness of the transition alloy coating is 750μm.

4. A surface spraying Al according to claim 1 X Ni Y / Carbon fiber composite material with high entropy alloy coating, characterized in that: The thickness of the carbon fiber composite material layer is 25 mm, and the surface roughness of the outer surface of the carbon fiber composite material layer after treatment is 4.5 μm.

5. A surface sprayed Al X Ni Y A method for preparing a carbon fiber composite material with a high entropy alloy coating, characterized in that: The method comprises the following steps: Step 1: Matrix pretreatment: The carbon fiber composite material layer matrix is ​​soaked in acetone and concentrated sulfuric acid at 45° C. for 30 minutes to remove the epoxy resin on the surface of the carbon fiber composite material layer; Step 2, surface roughening: Use 16# brown corundum sand to sandblast the surface of the carbon fiber composite material layer substrate, so that the surface roughness of the carbon fiber composite material layer after treatment reaches Ra=4.5μm; Step 3, plasma spraying: using plasma spraying equipment, using an equal molar ratio of AlNi alloy powder as a transition alloy coating material, spraying to form a transition alloy coating with a thickness of 750 μm, and then spraying an equal molar ratio of FeCoNiCrMo high entropy alloy powder as a material on the transition alloy coating to form a high entropy alloy surface layer with a thickness of 228.32 μm.

6. A surface spraying Al according to claim 5 X Ni Y A method for preparing a carbon fiber composite material with a high entropy alloy coating, characterized in that: The acetone and concentrated sulfuric acid in step 1 are commercially available pure acetone and pure concentrated sulfuric acid.

7. A surface sprayed Al according to claim 5 X Ni Y A method for preparing a carbon fiber composite material with a high entropy alloy coating, characterized in that: The transition alloy coating in the step three adopts a spraying voltage of 50V, a spraying current of 450A, and a spraying distance from the spray gun nozzle to the substrate of 200-300mm; when preparing the high entropy alloy surface layer, the spraying current is 500A, the main gas pressure is 70PSI, the carrier gas pressure is 60PSI, the spraying speed is 400mm / min, and the spraying distance from the spray gun nozzle to the substrate is 200-300mm; the temperature of the carbon fiber composite material layer substrate is controlled by air cooling and the spraying speed and distance to alleviate the influence of thermal stress on the coating during the process.

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