Composite bulkhead structure of deep sea suspension data center and preparation method of composite bulkhead structure

Abstract

The invention belongs to the field of ocean engineering and data center equipment, and relates to a composite bulkhead structure of a deep sea suspension data center and a preparation method of the composite bulkhead structure, the composite bulkhead structure comprises a titanium alloy honeycomb interlayer substrate, the titanium alloy honeycomb interlayer substrate adopts a hexagonal honeycomb design; the silicon nitride ceramic coating is deposited on the outer surface of the titanium alloy honeycomb interlayer substrate; a microcapsule corrosion inhibitor, wherein the microcapsule corrosion inhibitor is embedded in the silicon nitride ceramic coating; atomic-scale metallurgical bonding is achieved between the titanium alloy honeycomb interlayer base body and the silicon nitride ceramic coating through the vacuum diffusion welding technology. Through innovative material combination, structural design and process application, the comprehensive advantages of light weight, high strength, corrosion resistance and self-repairing are achieved, and powerful technical support is provided for reliability and economical efficiency of the deep sea suspension data center.

Description

Technical Field

[0001] The present invention belongs to the fields of ocean engineering and data center equipment, and relates to a composite bulkhead structure for a deep-sea floating data center and a preparation method thereof. Background Art

[0002] With the rapid development of information technology, the demand for data storage and processing has increased sharply. Due to its unique advantages, such as low temperature and stable environmental conditions, the deep-sea environment has become an ideal place to build a floating data center. However, the deep-sea environment poses huge challenges to the floating data center. Among them, the bulkhead structure, as a key protective component of the data center, faces the dual tests of huge water pressure and strong seawater corrosion.

[0003] In the existing technical solutions, although the traditional steel bulkhead structure has a certain strength, its compressive capacity is significantly insufficient in the extreme deep-sea environment. The high pressure in the deep sea will cause plastic deformation or even rupture of the steel bulkhead, seriously affecting the structural safety of the data center. At the same time, the steel surface is extremely vulnerable to damage in the salt spray corrosion environment, and obvious corrosion pits will appear in only 48 hours, resulting in a significant decrease in structural strength. Moreover, the maintenance work in the deep-sea environment is difficult and costly. Once the traditional bulkhead is damaged, the corrosive medium will quickly invade, leading to serious risks such as equipment damage and data leakage. At present, the related technologies in the field of deep-sea equipment mostly focus on specific scenarios or single-performance optimization, and an integrated solution for deep-sea floating data centers has not been formed. In terms of the technical solutions for marine bulkheads, they mainly focus on fields such as ship bulkheads, shipboard explosion relief structures, and high-pressure fluid penetration through the bulkhead. Although these solutions have achieved local protection or sealing effects in specific environments, most of them only focus on temperature difference, sealing performance, or local explosion resistance, and do not provide a systematic solution idea for the extreme compressive and corrosion-resistant performance required by deep-sea floating data centers.

[0004] For example, an arc-shaped reinforced pressure-resistant bulkhead structure for resisting underwater explosion shock with the publication number CN114212186B disperses the explosion shock energy through arc-shaped support plates, improving the compressive performance to a certain extent. However, its steel matrix is extremely prone to failure in a corrosive environment and does not involve coating protection, resulting in its inability to meet the actual requirements of deep-sea data centers in terms of both compressive strength and corrosion resistance. A ceramic coating for resisting marine organism corrosion and its preparation method with the publication number CN102181815A improves the antifouling performance of the coating by doping the ceramic matrix with copper oxide to reduce the attachment of marine organisms. However, the bonding force between the coating and the matrix of this solution is weak and is prone to interfacial peeling under the action of deep-sea high pressure, thus affecting the long-term service reliability, and it fails to effectively balance the dual requirements of compression resistance and corrosion resistance. In addition, there are obvious defects in the materials and processes in the existing technology, and it is impossible to balance lightweight, high strength, and long-term corrosion resistance at the same time. Moreover, there is a lack of a protective design for self-repair after micro-damage in the deep-sea environment, which poses many potential risks to the long-term operation of deep-sea floating data centers.

[0005] In summary, developing a composite bulkhead structure with compression resistance, corrosion resistance, and self-repair functions has become the core requirement for ensuring the long-term reliable operation of deep-sea floating data centers. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a composite bulkhead structure for a deep-sea floating data center and its preparation method to solve many problems existing in the prior art and provide a lightweight and highly reliable full-life-cycle protection solution for deep-sea data centers.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A composite bulkhead structure for a deep-sea floating data center, comprising:

[0009] A titanium alloy honeycomb sandwich matrix, the titanium alloy honeycomb sandwich matrix adopting a hexagonal honeycomb design;

[0010] A silicon nitride ceramic coating, the silicon nitride ceramic coating being deposited on the outer surface of the titanium alloy honeycomb sandwich matrix;

[0011] Microcapsule corrosion inhibitor, the microcapsule corrosion inhibitor being embedded in the silicon nitride ceramic coating;

[0012] Among them, an atomic-level metallurgical bond is achieved between the titanium alloy honeycomb sandwich matrix and the silicon nitride ceramic coating through vacuum diffusion welding technology.

[0013] Further, the titanium alloy honeycomb sandwich matrix is made of TC4 titanium alloy plates and is pretreated by chemical cleaning and mechanical polishing.

[0014] Further, the silicon nitride ceramic coating is deposited by plasma spraying technology, and the coating is dense and crack-free.

[0015] Further, the microcapsule corrosion inhibitor is a polyurethane-coated organic corrosion inhibitor microcapsule, and the microcapsule releases the corrosion inhibitor to form a protective film when the silicon nitride ceramic coating is damaged.

[0016] Further, reinforcing ribs are provided inside the titanium alloy honeycomb sandwich substrate, and the reinforcing ribs are arranged inside the titanium alloy honeycomb sandwich substrate at a certain interval to improve the overall compressive strength.

[0017] Further, a titanium alloy substrate is also included on the side of the silicon nitride ceramic coating away from the titanium alloy honeycomb sandwich substrate to serve as a support layer.

[0018] A preparation method for a composite bulkhead structure of a deep-sea floating data center includes the following steps:

[0019] a. Select TC4 titanium alloy plates and perform chemical cleaning and mechanical grinding pretreatment;

[0020] b. The pretreated TC4 titanium alloy plates are formed into hexagonal honeycomb sheets by stamping and assembled into a honeycomb sandwich structure by welding, and reinforcing ribs are arranged inside at the same time;

[0021] c. Use plasma spraying technology to deposit a silicon nitride ceramic coating on the outer surface of the honeycomb sandwich structure, and mix the microcapsule corrosion inhibitor with ceramic powder during the spraying process to form a composite coating;

[0022] d. Place the sprayed structure in a vacuum diffusion welding device and process it under high temperature and high pressure conditions to achieve atomic-level metallurgical bonding between the titanium alloy honeycomb sandwich substrate and the silicon nitride ceramic coating.

[0023] Further, the preparation method of the microcapsule corrosion inhibitor is: wrap the organic corrosion inhibitor in polyurethane microcapsules and uniformly mix it with silicon nitride ceramic powder.

[0024] Further, the vacuum diffusion welding process is carried out in a vacuum environment, and heat preservation and pressure maintenance are carried out to achieve a firm bond between the titanium alloy and the ceramic coating.

[0025] Further, it also includes performing compressive strength tests, salt spray corrosion tests and self-repair function tests on the prepared composite bulkhead structure to verify its performance.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. This technical solution provides a perfect balance between light weight and high strength for the composite bulkhead structure of deep-sea suspended data centers through the innovative combination of titanium alloy honeycomb interlayer and silicon nitride ceramic coating. The titanium alloy honeycomb interlayer adopts a hexagonal design with internal reinforcement ribs, which can effectively disperse the deep-sea high-pressure load, significantly improve the compressive strength, and meet the demanding requirements of deep-sea environments. At the same time, the silicon nitride ceramic coating, with its high hardness characteristics, provides a solid protective barrier for the substrate and effectively resists seawater erosion. The salt spray test has verified that the coating can remain intact in extreme environments, fully demonstrating its excellent corrosion resistance. This design not only reduces the weight of the structure, but also enhances its practicality, laying the foundation for the efficient operation of deep-sea equipment.

[0028] 2. This technical solution embeds microcapsule corrosion inhibitors in the ceramic coating, giving the composite bulkhead a unique self-repairing function. When the coating is damaged by external forces, the microcapsules will automatically release the corrosion inhibitors to form a protective film to prevent the corrosive medium from further invading the matrix. This innovative mechanism significantly extends the service life of the bulkhead, while greatly reducing the maintenance frequency and cost in deep-sea environments. The realization of the self-repairing function not only reflects the advanced nature of the technology, but also solves the practical problem of difficult maintenance of deep-sea equipment, provides reliable guarantees for long-term stable operation, and highlights its major breakthrough in practicality.

[0029] 3. In addition, the technical solution uses vacuum diffusion welding technology to ensure the formation of atomic-level metallurgical bonding between the titanium alloy substrate and the ceramic coating. This advanced welding process avoids the risk of coating peeling or falling off under high pressure in the deep sea, greatly enhancing the overall stability and durability of the structure. Whether in extreme pressure or corrosive environment, the composite bulkhead can maintain excellent performance. In summary, this technical solution achieves the comprehensive advantages of lightweight, high strength, corrosion resistance and self-repair through innovative material combinations, structural design and process applications, providing strong technical support for the reliability and economy of deep-sea suspended data centers.

[0030] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0032] Figure 1It is a schematic cross-sectional view of a composite bulkhead structure of a deep-sea suspended data center in an embodiment, showing the distribution relationship between the titanium alloy honeycomb sandwich matrix and the silicon nitride ceramic coating in the composite bulkhead structure;

[0033] Figure 2 It is a surface morphology diagram of the ceramic coating in the embodiment, presenting the uniformity and denseness of the coating;

[0034] Figure 3 It is a distribution diagram of the microcapsule corrosion inhibitor in the silicon nitride ceramic coating in the embodiment, showing the dispersion of the microcapsules.

[0035] Reference numerals: 1 - titanium alloy honeycomb sandwich matrix, 2 - hexagonal honeycomb unit, 3 - titanium alloy stiffener, 4 - silicon nitride ceramic coating, 5 - microcapsule corrosion inhibitor, 6 - vacuum diffusion welding interface, 7 - titanium alloy substrate, 8 - microscopic pores on the coating surface, 9 - area where the microcapsule ruptures and releases the corrosion inhibitor, 10 - seawater corrosion medium barrier layer, 11 - underwater suspended data center cabin. Detailed implementation manners

[0036] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] Example 1

[0040] Please refer to Figure 1 , the composite bulkhead structure in this embodiment is composed of a titanium alloy honeycomb sandwich matrix 1, a silicon nitride ceramic coating 4, and a microcapsule corrosion inhibitor 5. The titanium alloy honeycomb sandwich matrix 1 is formed by stamping and welding hexagonal honeycomb units 2, and titanium alloy reinforcing ribs 3 are welded at intervals inside to improve the compressive strength. The outer surface of the honeycomb sandwich is combined with the silicon nitride ceramic coating 4 through a vacuum diffusion welding interface 6, and the microcapsule corrosion inhibitor 5 is evenly distributed in the silicon nitride ceramic coating 4. The innermost and outermost titanium alloy substrates 7 serve as support layers to ensure the lightweight and high strength of the overall structure.

[0041] As Figure 2 shown, the silicon nitride ceramic coating 4 is formed by a plasma spraying process, and its surface morphology is dense and uniform. There are no cracks or holes in the microscopic pores 8 on the coating surface, and the high hardness and corrosion resistance of the coating can effectively block seawater erosion.

[0042] As Figure 3 shown, the microcapsule corrosion inhibitor 5 is uniformly embedded in the ceramic coating in the form of polyurethane microcapsules. When the coating is damaged, a region 9 where the microcapsules rupture and release the corrosion inhibitor is formed. The microcapsules rupture and release the organic corrosion inhibitor to form a seawater corrosion medium barrier layer 10 as a protective film to prevent the intrusion of corrosion media (such as Cl- ions) into the titanium alloy matrix.

[0043] Example 2

[0044] The preparation method of the composite bulkhead structure of the deep-sea suspended data center includes the following steps:

[0045] Step 1: Material selection and pretreatment

[0046] In this embodiment, TC4 titanium alloy plates are selected as the bulkhead matrix material, which has excellent mechanical properties and corrosion resistance. First, the titanium alloy plates are cut into specified sizes according to the design requirements and chemically cleaned to thoroughly remove surface oil, oxide layers, and other impurities; then mechanical grinding treatment is carried out to make the surface of the plates reach a certain roughness to ensure good adhesion during the subsequent spraying of the ceramic coating.

[0047] Step 2: Manufacture of the honeycomb sandwich structure

[0048] The pre-treated titanium alloy sheet is formed into a sheet with a hexagonal honeycomb structure through stamping technology. Subsequently, the stamped honeycomb sheets are assembled into an integral honeycomb sandwich structure using high-precision welding technology. And according to the mechanical design requirements, reinforcing ribs are arranged at certain intervals inside the honeycomb to enhance the compressive capacity and stability of the overall structure. This honeycomb sandwich structure not only significantly reduces the overall density, but also effectively disperses the external high-pressure load using the geometric structure, resulting in a remarkable improvement in the overall compressive strength.

[0049] Step Three: Ceramic Coating Spraying and Microcapsule Corrosion Inhibitor Addition

[0050] After the honeycomb sandwich structure is prepared, an advanced plasma spraying technology is used to uniformly deposit a silicon nitride ceramic coating on its outer surface, and ensure that the coating is dense, uniform, without cracks and pores (by optimizing spraying parameters such as spraying distance, spray gun speed, and powder flow rate, the coating reaches the ideal thickness to ensure that the coating is dense, uniform and defect-free). At the same time, to achieve the self-healing function of the coating, polyurethane-encapsulated organic corrosion inhibitor microcapsules are uniformly mixed in the ceramic powder and deposited on the surface of the titanium alloy substrate together during the spraying process to form a silicon nitride ceramic coating with self-healing ability.

[0051] Step Four: Strengthening of Interlayer Connection - Vacuum Diffusion Bonding Process

[0052] To ensure a strong bonding force between the silicon nitride ceramic coating and the titanium alloy honeycomb sandwich substrate 1 and prevent the coating from peeling off under deep-sea high pressure, the vacuum diffusion bonding technology is adopted in this embodiment. The structure with the sprayed composite coating is placed in a vacuum diffusion bonding device and subjected to heat preservation and pressure holding treatment under high temperature, high pressure and vacuum environment. During this process, atomic-level diffusion bonding occurs between the titanium alloy substrate and the ceramic coating, forming a strong metallurgical bonding interface, thus significantly enhancing the stability and durability of the overall structure.

[0053] Step Five: Performance Testing and Verification

[0054] After completing the above processes, a series of performance tests are carried out on the prepared composite bulkhead structure:

[0055] (1) Compressive test: Under the simulated deep-sea high-pressure environment, a uniform pressure is applied to the bulkhead structure to detect whether there is plastic deformation or fracture in the structure. The results show that there is no obvious deformation in the overall structure under this pressure, and the compressive strength is significantly improved;

[0056] (2) Salt spray corrosion test: The sample is continuously sprayed in a salt spray chamber, and the state of the bulkhead surface and the substrate is observed. The test results show that the ceramic coating is intact without corrosion marks, and the titanium alloy substrate remains in good condition;

[0057] (3) Self-healing function test: Artificial scratches were made in a local area of the sample to simulate the micro-damage that may occur during actual use, and the release of the microcapsule corrosion inhibitor and the formation of the protective film were detected. The results showed that the microcapsules automatically released the corrosion inhibitor in the scratched area, quickly formed a protective film, and effectively prevented the intrusion of corrosive media.

[0058] The working principle of this composite bulkhead structure is as follows: Firstly, a high-strength and lightweight matrix is provided by the titanium alloy honeycomb sandwich structure; Secondly, the silicon nitride ceramic coating is used to resist seawater corrosion and improve the local compressive strength at the same time; Thirdly, the self-healing function of the coating is realized by embedding the microcapsule corrosion inhibitor; Finally, the vacuum diffusion welding technology is adopted to ensure the firm connection between layers, ensuring the long-term stable operation of the entire composite structure in the extreme deep-sea environment. Combining the above technical means, the composite bulkhead structure of the present invention not only has a significant effect on the compressive strength, but also in the corrosion resistance test, after the salt spray test, the coating is intact and there is no corrosion trace on the matrix, and it also has self-healing ability, significantly reducing the difficulty and cost of deep-sea maintenance.

[0059] In summary, the present invention adopts a titanium alloy honeycomb sandwich structure, a silicon nitride ceramic coating, a microcapsule corrosion inhibitor and a vacuum diffusion welding process to constitute a composite bulkhead structure for a deep-sea floating data center with high compressive strength, excellent corrosion resistance and self-healing function.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A composite bulkhead structure of a deep - sea suspended data center, characterized in that, Comprising: A titanium alloy honeycomb sandwich matrix, which adopts a hexagonal honeycomb design; A silicon nitride ceramic coating, which is deposited on the outer surface of the titanium alloy honeycomb sandwich matrix; Microcapsule corrosion inhibitors, which are embedded in the silicon nitride ceramic coating; Wherein, an atomic-level metallurgical bond is achieved between the titanium alloy honeycomb sandwich matrix and the silicon nitride ceramic coating through a vacuum diffusion welding technique.

2. The composite bulkhead structure of the deep-sea suspended data center according to claim 1, wherein The titanium alloy honeycomb sandwich matrix is made of TC4 titanium alloy plates and is pretreated by chemical cleaning and mechanical polishing.

3. The composite bulkhead structure of the deep-sea suspended data center according to claim 1, characterized in that, The silicon nitride ceramic coating is deposited by a plasma spraying technique, and the coating is dense and crack-free.

4. The composite bulkhead structure of the deep-sea suspended data center according to claim 1, wherein The microcapsule corrosion inhibitor is a polyurethane-coated organic corrosion inhibitor microcapsule, and the microcapsule releases the corrosion inhibitor to form a protective film when the silicon nitride ceramic coating is damaged.

5. The composite bulkhead structure of the deep-sea suspended data center according to claim 1, characterized in that, Reinforcing ribs are arranged inside the titanium alloy honeycomb sandwich matrix, and the reinforcing ribs are arranged inside the titanium alloy honeycomb sandwich matrix at a certain interval to improve the overall compressive strength.

6. The composite bulkhead structure of the deep-sea suspended data center according to claim 1, characterized in that, It also includes a titanium alloy substrate arranged on the side of the silicon nitride ceramic coating away from the titanium alloy honeycomb sandwich matrix to serve as a support layer.

7. A preparation method for a composite bulkhead structure of a deep-sea suspended data center, characterized in that, Including the following steps: a. Select TC4 titanium alloy plates and perform pretreatment by chemical cleaning and mechanical polishing; b. The pretreated TC4 titanium alloy plates are formed into hexagonal honeycomb sheets by stamping and assembled into a honeycomb sandwich structure by a welding process, and reinforcing ribs are arranged inside at the same time; c. A silicon nitride ceramic coating is deposited on the outer surface of the honeycomb sandwich structure by a plasma spraying technique, and the microcapsule corrosion inhibitor is mixed with the ceramic powder during the spraying process to form a composite coating; d. The sprayed structure is placed in a vacuum diffusion welding device and processed under high temperature and high pressure conditions to achieve an atomic-level metallurgical bond between the titanium alloy honeycomb sandwich matrix and the silicon nitride ceramic coating.

8. The preparation method according to claim 7, characterized in that, The preparation method of the microcapsule corrosion inhibitor is: wrapping the organic corrosion inhibitor in polyurethane microcapsules and uniformly mixing them with silicon nitride ceramic powder.

9. The preparation method according to claim 7, characterized in that, The vacuum diffusion welding process is carried out in a vacuum environment, and heat preservation and pressure maintenance are carried out to achieve a firm bond between the titanium alloy and the ceramic coating.

10. The preparation method according to claim 7, wherein, It also includes performing compressive strength tests, salt spray corrosion tests and self-healing function tests on the prepared composite bulkhead structure to verify its performance.

Images