Fiber reinforced alloy material and preparation method thereof

Abstract

The invention discloses a fiber-reinforced alloy material and a preparation method thereof. The preparation method of the fiber reinforced alloy material comprises the following steps. And a fiber modification step: carrying out surface treatment on the carbon fiber by using a silane coupling agent to obtain the modified carbon fiber. And a compounding step: performing vacuum melting on the metal base material, then adding the modified carbon fibers, performing stirring and vibration mixing, adding a refining agent in the mixing process, and performing cooling solidification after mixing is completed. According to the preparation method of the fiber reinforced alloy material, the overall performance of metal is improved through the prepared fiber reinforced alloy material, and the fiber reinforced alloy material has excellent mechanical performance and good high temperature resistance and corrosion resistance.

Description

Technical Field

[0001] This application relates to the field of composite materials technology, and more specifically to a fiber-reinforced alloy material and its preparation method. Background Technology

[0002] With the rapid development of science and technology, the requirements for material performance are also increasing. Composite materials, as new materials composed of two or more materials with different properties combined through physical or chemical methods, have been widely used in many fields because they can combine the advantages of each component.

[0003] However, the performance of existing composite materials still needs improvement in certain specific applications, such as high temperature, high pressure, and strong corrosion environments. For example, alloy materials such as aluminum alloys, although possessing certain high temperature and corrosion resistance, still have shortcomings in terms of mechanical properties when facing complex environments.

[0004] Therefore, there is a need for a fiber-reinforced alloy material and its preparation method to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this application provides a method for preparing a fiber-reinforced alloy material, the method comprising the following steps:

[0007] The fiber modification step involves surface treatment of carbon fibers with a silane coupling agent to obtain modified carbon fibers.

[0008] In the composite step, the modified carbon fiber is added after vacuum melting of the metal substrate, stirred and vibrated to mix, a refining agent is added during the mixing process, and the mixture is cooled and solidified after mixing is completed.

[0009] According to the preparation method of the fiber-reinforced alloy material of this application, the prepared fiber-reinforced alloy material improves the overall performance of the metal, has excellent mechanical properties, and has good high temperature resistance and corrosion resistance.

[0010] Optionally, the fiber modification step includes:

[0011] The hydrolysis step involves dissolving the silane coupling agent in ethanol, then adding water to carry out the hydrolysis reaction to obtain a coupling agent solution.

[0012] The processing steps involve impregnating the carbon fiber in the coupling agent solution and drying it to obtain the modified carbon fiber.

[0013] Optionally, the mass ratio of the ethanol to the silane coupling agent is 5 to 20:1;

[0014] The amount of water added is 10% to 30% of the mass of the silane coupling agent.

[0015] Optionally, the hydrolysis reaction is carried out under the following conditions: stirring at 20℃ to 40℃ for 0.5h to 2h.

[0016] Optionally, the processing steps include:

[0017] The carbon fiber is immersed in the coupling agent solution for 10 min to 60 min;

[0018] The impregnated carbon fiber is pre-dried at room temperature for 10 to 30 minutes.

[0019] The pre-dried carbon fiber is cured at 100℃~150℃ for 1h~3h to obtain the modified carbon fiber.

[0020] Optionally, the processing steps further include:

[0021] The modified carbon fiber was soaked in a cleaning agent for 15 to 30 minutes.

[0022] After cleaning, the modified carbon fiber is dried.

[0023] The cleaning agent includes sodium alkylbenzene sulfonate, alkaline surfactant, thickener, and bleach.

[0024] Optionally, the method for preparing the fiber-reinforced alloy material further includes:

[0025] The post-processing step involves heat-treating and machining the product obtained in the composite step to obtain the fiber-reinforced alloy material.

[0026] Optionally, in the composite step:

[0027] The modified carbon fiber is present in the fiber-reinforced alloy material at a volume fraction of 10% to 33%.

[0028] The refining agent is hexachloroethane;

[0029] The cooling and solidification temperature is 100℃~160℃.

[0030] Optionally, the carbon fiber has a tensile strength of 2000MPa to 3500MPa, a length of 0.5 to 3mm, a single filament number of 6000 to 24000 per bundle of carbon fiber, and a single filament diameter of 5μm to 10μm.

[0031] The silane coupling agent is an aminosilane coupling agent;

[0032] The metal substrate is selected from titanium alloy or aluminum alloy.

[0033] The second aspect of this application provides a fiber-reinforced alloy material, which is prepared by the preparation method of the fiber-reinforced alloy material described in the first aspect above.

[0034] The fiber-reinforced alloy material according to this application improves the overall performance of the metal, exhibiting excellent mechanical properties and good high-temperature resistance and corrosion resistance. Detailed Implementation

[0035] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0037] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” and the term “second component” does not imply the existence of a “first component.” It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0038] Exemplary embodiments according to this application will now be described in more detail.

[0039] This application provides a method for preparing a fiber-reinforced alloy material and the fiber-reinforced alloy material itself. The fiber-reinforced alloy material is prepared using the method described above.

[0040] The preparation method of fiber-reinforced alloy materials includes a fiber modification step and a composite step. The fiber modification step involves surface treatment of carbon fibers using a silane coupling agent to obtain modified carbon fibers. The composite step involves vacuum melting a metal substrate, adding the modified carbon fibers, stirring and vibrating to mix, adding a refining agent during the mixing process, and then cooling and solidifying after mixing is complete.

[0041] According to the preparation method of the fiber-reinforced alloy material of this application, the prepared fiber-reinforced alloy material improves the overall performance of the metal, has excellent mechanical properties, and has good high temperature resistance and corrosion resistance.

[0042] Furthermore, the preparation method of fiber-reinforced alloy materials also includes a post-processing step. The post-processing step includes heat treatment and machining of the product obtained in the composite step to obtain the fiber-reinforced alloy material. This further improves the mechanical properties of the fiber-reinforced alloy material.

[0043] Specifically, the fiber modification process includes a hydrolysis step and a treatment step.

[0044] The hydrolysis step involves dissolving the silane coupling agent in ethanol, followed by adding water to carry out a hydrolysis reaction, yielding a coupling agent solution. As an optional embodiment, the mass ratio of ethanol to silane coupling agent is 5–20:1, and the amount of water added is 10%–30% of the mass of the silane coupling agent. The hydrolysis reaction conditions are: stirring at 20°C–40°C for 0.5–2 hours. The silane coupling agent is an aminosilane coupling agent. As an example, KH550 coupling agent can be used.

[0045] In other words, the hydrolysis step specifically involves dissolving the silane coupling agent in 5 to 20 times its mass of ethanol, then adding 10% to 30% of the mass of water to the silane coupling agent, and then stirring at 20°C to 40°C for 0.5 to 2 hours to allow the silane coupling agent to be fully hydrolyzed and form silanol groups.

[0046] The processing steps include impregnating carbon fibers in a coupling agent solution and drying them to obtain modified carbon fibers. More specifically, the processing steps include impregnating the carbon fibers in the coupling agent solution for 10 to 60 minutes to ensure full contact between the carbon fibers and the coupling agent solution, allowing the silane coupling agent, or silanol groups, to uniformly adhere to the surface of the carbon fibers. Afterward, the impregnated carbon fibers are pre-dried at room temperature for 10 to 30 minutes. After pre-drying, they are placed in an environment of 100°C to 150°C, such as an oven, and cured for 1 to 3 hours to obtain modified carbon fibers. During the curing process, the silanol groups on the silane coupling agent undergo a locking reaction with the hydroxyl groups on the carbon fiber surface, forming chemical bonds, thereby firmly binding the silane coupling agent to the surface of the carbon fibers.

[0047] The carbon fibers selected in this application have a tensile strength of 2000MPa to 3500MPa, a length of 0.5 to 3mm, and a single filament count of 6000 to 24000 per bundle. The diameter of each carbon fiber filament is [missing information].

[0048] 5μm to 10μm. As an example, the carbon fiber used in this application can be T700 to T1000 grade carbon fiber.

[0049] In a preferred embodiment, after the modified carbon fiber has cured, it can be cleaned to remove unreacted substances grafted onto the carbon fiber surface, thereby improving the compatibility of the modified carbon fiber with metals. Specifically, the modified carbon fiber is immersed in a cleaning agent composed of sodium alkylbenzene sulfonate, alkaline surfactant, thickener, and bleach for 15 to 30 minutes. After cleaning, the modified carbon fiber is dried, preferably at a low temperature.

[0050] In the composite process, the metal substrate can be either aluminum alloy or titanium alloy. First, the metal substrate is vacuum-melted under a vacuum of 70 Pa to 100 Pa, with the aluminum alloy melting at 635℃-685℃ and the titanium alloy melting at 1500℃-1680℃, thus bringing the metal substrate to a molten state. While maintaining the vacuum, modified carbon fibers are uniformly added to the molten metal substrate, and then thoroughly mixed using methods such as stirring and vibration.

[0051] The volume fraction of the added modified carbon fiber is 10%-33% of the fiber-reinforced alloy material. In other words, the volume fraction of the modified carbon fiber added to the metal substrate melt is 10%-33% of the total volume of the modified carbon fiber and the metal melt.

[0052] Furthermore, refining agents such as hexachloroethane are added during the stirring process to remove gases and inclusions from the melt, reducing porosity defects in the final composite material. Then, while maintaining a vacuum, the mixed melt is poured into a mold and cooled and solidified at 100°C-160°C. Following the post-processing steps described above, the fiber-reinforced alloy material with the desired properties can be obtained.

[0053] The present application will now be described in more detail with reference to embodiments and comparative examples.

[0054] Example 1

[0055] The metal substrate is made of titanium alloy, and its components are: 5-6% Al, 4-5% V, and 89-91% Ti.

[0056] The carbon fiber used is T800, with a single filament diameter of 6μm, a fiber length of 1.5mm, and 10,000 single fibers per bundle.

[0057] KH550 was selected as the silane coupling agent.

[0058] First, dissolve the silane coupling agent in 15 times its mass of ethanol, then add 20% of the mass of the silane coupling agent in water, and then stir at 30°C for 1 hour.

[0059] The carbon fibers were then impregnated in a coupling agent solution for 30 minutes, and after impregnation, they were pre-dried at room temperature for 20 minutes. They were then cured in an oven at 130°C for 2 hours to obtain the modified carbon fibers.

[0060] The titanium alloy was heated to 1500℃~1680℃ under a vacuum of 100Pa for vacuum melting, bringing the metal substrate to a molten state. While maintaining the vacuum, modified carbon fibers were uniformly added to the molten metal substrate and stirred and vibrated for 30 minutes to ensure thorough mixing. The volume fraction of the added modified carbon fibers was 20% of the total volume of the titanium alloy and modified carbon fibers. While maintaining the vacuum, the mixed melt was poured into a mold and cooled and solidified at 120℃-160℃. The solidified material was then heat-treated and cured by machining at a pressure of 0.6MPa to obtain the desired fiber-reinforced alloy material.

[0061] Example 2

[0062] Similar to Example 1, except that the carbon fiber used is M60J, with a single filament diameter of 6μm, a fiber length of 1.5mm, and 10,000 single fibers per bundle. Furthermore, the carbon fiber volume fraction is 20% of the total volume.

[0063] Comparative Example 1

[0064] The same unfiber-reinforced titanium alloy as in Example 1 was used.

[0065] Comparative Example 2

[0066] It is basically similar to Example 1, except that the carbon fiber is not modified.

[0067] Comparative Example 3

[0068] It is basically similar to Example 2, except that the carbon fiber is not modified.

[0069] Table 1 below shows the performance test results of Examples 1, 2, 1, 2, and 3. The long-term operating temperature refers to the temperature at which the material can maintain more than 65% of its strength under standard conditions during long-term operation.

[0070] Table 1

[0071]

[0072] As shown in Table 1, the performance of carbon fiber reinforced titanium alloys is far superior to that of pure titanium alloys. Furthermore, after modifying the carbon fibers using the modification method described in this application, their compatibility with metals is significantly improved, further enhancing the performance of the fiber-reinforced alloy materials.

[0073] The processes and steps described in all the preferred embodiments above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than the above-described processes. The order of steps in the above processes can also be added, combined, or deleted according to actual needs.

[0074] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0075] This application has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This application is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A method for preparing a fiber-reinforced alloy material, characterized in that, The preparation method of the fiber-reinforced alloy material includes the following steps: The fiber modification step involves surface treatment of carbon fibers with a silane coupling agent to obtain modified carbon fibers. In the composite step, the modified carbon fiber is added after vacuum melting of the metal substrate, stirred and vibrated to mix, a refining agent is added during the mixing process, and the mixture is cooled and solidified after mixing is completed.

2. The method for preparing fiber-reinforced alloy material according to claim 1, characterized in that, The fiber modification step includes: The hydrolysis step involves dissolving the silane coupling agent in ethanol, then adding water to carry out the hydrolysis reaction to obtain a coupling agent solution. The processing steps involve impregnating the carbon fiber in the coupling agent solution and drying it to obtain the modified carbon fiber.

3. The method for preparing fiber-reinforced alloy material according to claim 2, characterized in that, The mass ratio of ethanol to silane coupling agent is 5-20:1; The amount of water added is 10% to 30% of the mass of the silane coupling agent.

4. The method for preparing fiber-reinforced alloy material according to claim 2, characterized in that, The conditions for the hydrolysis reaction are: stirring at 20℃~40℃ for 0.5h~2h.

5. The method for preparing fiber-reinforced alloy material according to claim 2, characterized in that, The processing steps include: The carbon fiber is immersed in the coupling agent solution for 10 min to 60 min; The impregnated carbon fiber is pre-dried at room temperature for 10 to 30 minutes. The pre-dried carbon fiber is cured at 100℃~150℃ for 1h~3h to obtain the modified carbon fiber.

6. The method for preparing the fiber-reinforced alloy material according to claim 5, characterized in that, The processing steps also include: The modified carbon fiber was soaked in a cleaning agent for 15 to 30 minutes. After cleaning, the modified carbon fiber is dried. The cleaning agent includes sodium alkylbenzene sulfonate, alkaline surfactant, thickener, and bleach.

7. The method for preparing fiber-reinforced alloy material according to claim 1, characterized in that, The method for preparing the fiber-reinforced alloy material further includes: The post-processing step involves heat-treating and machining the product obtained in the composite step to obtain the fiber-reinforced alloy material.

8. The method for preparing the fiber-reinforced alloy material according to any one of claims 1 to 7, characterized in that, In the composite step: The modified carbon fiber is present in the fiber-reinforced alloy material at a volume fraction of 10% to 33%. The refining agent is hexachloroethane; The cooling and solidification temperature is 100℃~160℃.

9. The method for preparing the fiber-reinforced alloy material according to any one of claims 1 to 7, characterized in that, The carbon fiber has a tensile strength of 2000MPa to 3500MPa, a length of 0.5 to 3mm, a single filament number of 6000 to 24000 per bundle, and a single filament diameter of 5μm to 10μm. The silane coupling agent is an aminosilane coupling agent; The metal substrate is selected from titanium alloy or aluminum alloy.

10. A fiber-reinforced alloy material, characterized in that, The fiber-reinforced alloy material is prepared by the method for preparing fiber-reinforced alloy materials according to any one of claims 1 to 9.

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