Hot wire winding prestressed composite ceramic, preparation method thereof and hot wire winding device

Abstract

The present invention discloses a hot-wire-wound prestressed composite ceramic, a preparation method, and a hot-wire-wound device. The hot-wire-wound prestressed composite ceramic comprises a ceramic substrate and a metal wire, the metal wire being evenly wound around the outer surface of the ceramic substrate. By utilizing the dual effects of thermal and mechanical contraction, the present invention achieves dual compressive stress on the surface of the ceramic component, significantly enhancing the impact strength of the composite ceramic component.

Description

Technical Field

[0001] The invention belongs to the field of high-tech ceramic preparation, and specifically relates to a hot wire wound prestressed composite ceramic, a preparation method thereof and a hot wire winding device. Background Art

[0002] Ceramic materials are widely used in aviation, aerospace, shipbuilding, weapons, electronics, nuclear industry and other fields due to their high insulation properties, excellent corrosion resistance and high mechanical strength.

[0003] Since ceramic materials are brittle materials, they are often strengthened and toughened using specific processing methods to obtain performance indicators or economic indicators that meet specific service environments.

[0004] There are many conventional reinforcement and toughening methods, mainly including particle reinforcement, fiber reinforcement, composite reinforcement, structural reinforcement and prestressed reinforcement, etc.

[0005] There are two main conventional processes for prestressed reinforcement: co-firing and casting. The co-firing method involves coating a high-expansion base material with one or more layers of a low-expansion coating material, followed by high-temperature co-firing to produce a prestressed composite ceramic. The disadvantage of this type of ceramic is that it retains its brittle nature and has poor machinability. The casting method involves directly casting molten metal onto the ceramic surface to form a prestressed composite ceramic. This composite material combines the advantages of both metals and ceramics, and has broad application prospects in security fields such as personal protection and armor protection.

[0006] There is no public report on the preparation of hot wire wound prestressed composite ceramics. Summary of the Invention

[0007] In view of this, the main purpose of the present invention is to provide a hot wire wound prestressed composite ceramic, its preparation method and hot wire winding device. By introducing a heating mechanism and a tensioning mechanism, the hot winding of the metal wire is completed on the surface of the ceramic component. Under the dual effects of thermal shrinkage and mechanical shrinkage, the metal wire can apply double compressive stress to the ceramic component, thereby greatly improving the impact resistance of the composite ceramic component.

[0008] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions: According to the present invention, a hot wire wound prestressed composite ceramic is provided, which comprises: a ceramic matrix and a metal wire, wherein the metal wire is evenly wound on the outer surface of the ceramic matrix.

[0009] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0010] Preferably, in the aforementioned hot wire wound prestressed composite ceramic, the metal wires are composed of warp metal wires and weft metal wires; the warp metal wires and weft metal wires do not intersperse with each other.

[0011] Preferably, in the aforementioned hot wire wound prestressed composite ceramic, the ceramic matrix is ​​a single-phase or multi-phase ceramic, and the four sides of the ceramic matrix are arc edges, and the arc radius is 0<R≤0.5 times the thickness of the matrix.

[0012] Preferably, in the aforementioned hot wire wound prestressed composite ceramic, the ceramic matrix is ​​alumina, zirconia, silicon carbide, silicon nitride or zirconia toughened alumina.

[0013] Preferably, in the aforementioned hot-wire-wound prestressed composite ceramic, the material of the metal wire is aluminum alloy, stainless steel or Invar alloy, and the diameter of the metal wire is 0.1 mm to 2 mm.

[0014] The purpose of the present invention and the solution to its technical problems are also achieved by adopting the following technical solutions. According to the present invention, a method for preparing a hot wire wound prestressed composite ceramic comprises the following steps:

[0015] (1) Prepare the ceramic parts to be wound;

[0016] (2) Prepare the metal wire to be wound;

[0017] (3) Clamp the ceramic component firmly on the rotating fixture;

[0018] (4) Wind the wire on the support column, pass it through the tensioning mechanism, and lead it to the rotating fixture of the ceramic component;

[0019] (5) Turn on the heating power supply and heat the wire coil to the preset temperature; set the tension to ensure that the wire remains within the elastic deformation range at this temperature;

[0020] (6) The ceramic component is driven to rotate at a speed of 0 to 100 rpm by the motor at the end of the rotating tool; the support column is driven to move back and forth by the motor at the end of the support column, and the metal wire completes the uniform longitudinal coating of the surface of the ceramic component under the hot stretching state;

[0021] (7) Vertically adjust the clamping position of the ceramic component and repeat steps (4) to (6) to complete the uniform weft coating of the metal wire on the surface of the ceramic component under hot stretching;

[0022] (8) Repeat steps (4) to (7) to complete the multi-layer two-dimensional uniform coating of the metal wire on the surface of the ceramic component under the hot stretching state, and obtain the hot wire wrapped prestressed composite ceramic.

[0023] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0024] Preferably, in the aforementioned method for preparing a hot wire wound prestressed composite ceramic, in step (1), the material of the ceramic component is selected from one of alumina, zirconia, silicon carbide, silicon nitride toughened alumina, zirconia toughened alumina and boron nitride.

[0025] Preferably, in the aforementioned method for preparing a hot wire-wound prestressed composite ceramic, in step (1), the ceramic component has a shape of a square plate with a size of 205 mm×205 mm×10 mm.

[0026] Preferably, in the aforementioned method for preparing a hot wire-wound prestressed composite ceramic, in step (2), the metal wire is made of aluminum alloy, stainless steel or Invar alloy, and has a diameter of 0.1 mm to 2 mm.

[0027] Preferably, in the aforementioned method for preparing a hot wire-wound prestressed composite ceramic, in step (5), the tensioning force is 0 kgf to 50 kgf; and the preset temperature is room temperature to 500°C.

[0028] Preferably, in the aforementioned method for preparing a hot wire-wound prestressed composite ceramic, in step (6), the temperature of the metal wire in the hot stretched state is room temperature-500°C, and the stretching force is 0kgf~50kgf; the round-trip speed of the uniform or intermittent motion is 1~10m / s.

[0029] The purpose of the present invention and the solution to its technical problems are also achieved by adopting the following technical solutions. A hot wire winding device proposed in the present invention includes a moving platform, a control cabinet, a wire winding wheel, a metal wire, a tensioning mechanism, a heating box and a winch; wherein,

[0030] The bottom of the mobile platform is movably connected with four universal wheels;

[0031] A control cabinet is welded on the movable platform;

[0032] The wire wheel is connected to the upper surface of the movable platform by bolts and is passively free to rotate through the central axis;

[0033] The diameter of the metal wire is 0.1mm to 2mm, and the metal wire is introduced by a wire winding wheel, passes through a tensioning mechanism and a heating box, is clamped by a winch clamping fixture, and is then wound on the surface of the ceramic component under the drive of a side motor and an end motor;

[0034] A slide rail is fixed to the upper surface of the movable platform, and the tensioning mechanism is connected to the slide rail via bolts;

[0035] The heating box is connected to the upper surface of the movable platform by bolts; the heating box consists of a wire inlet nozzle, a heating chamber and a wire outlet nozzle, and the wire inlet nozzle and the wire outlet nozzle are respectively connected to the outer wall of the heating chamber by bolts; the heating chamber is composed of an insulation layer, a resistance wire and a cavity from the inside to the outside;

[0036] The capstan is connected to the upper surface of the movable platform by bolts; the capstan is composed of a side motor, a capstan bracket, a clamping fixture, a sliding guide rail and an end motor; wherein, the side motor and the capstan bracket are connected to the sliding guide rail by threads, and the clamping fixture is connected to the main shaft of the capstan bracket by a tripod chuck; the sliding guide rail and the end motor are connected to the upper surface of the movable platform by threads.

[0037] By means of the above technical solution, the present invention provides a hot wire-wound prestressed composite ceramic, a preparation method thereof, and a hot wire-wound device, which have at least the following advantages:

[0038] 1. High degree of automation, which can realize fully automatic and efficient preparation of prestressed ceramics;

[0039] 2. Good impact resistance: Through the dual shrinkage of thermal shrinkage and mechanical shrinkage, dual compressive stress is obtained on the ceramic surface, and the impact resistance can be improved by 60%;

[0040] 3. By utilizing the dual effects of thermal shrinkage and mechanical shrinkage, dual compressive stress can be obtained on the surface of ceramic components, thereby greatly improving the impact strength of composite ceramic components.

[0041] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic structural diagram of a hot wire-wound prestressed composite ceramic according to an embodiment of the present invention;

[0043] Figure 2A This is a schematic structural diagram of a hot wire winding device according to an embodiment of the present invention;

[0044] Figure 2B This is the second structural schematic diagram of the reel in the hot wire winding device according to an embodiment of the present invention.

[0045] Among them, 1-ceramic matrix;

[0046] 2-metal wire; 21-warp metal wire; 22-weft metal wire;

[0047] 10-Mobile station;

[0048] 20-control cabinet;

[0049] 30-spooling wheel;

[0050] 40-metal wire;

[0051] 50- tensioning mechanism;

[0052] 60-heating box; 601-wire inlet nozzle; 602-heating chamber; 603-wire outlet nozzle;

[0053] 70-capstan; 701-side motor; 702-capstan bracket; 703-capstan mounting fixture; 704-ceramic component; 705-sliding guide rail; 706-end motor. DETAILED DESCRIPTION

[0054] To further illustrate the technical means and effectiveness of the present invention in achieving its intended objectives, the following, in conjunction with preferred embodiments, describes in detail a hot-wire-wound prestressed composite ceramic, its preparation method, and hot-wire-wound device, including its specific implementation, structure, features, and effectiveness. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0055] like Figure 1 As shown, some embodiments of the present invention provide a hot wire wound prestressed composite ceramic, which includes a ceramic matrix 1 and a metal wire 2, and the metal wire 2 is evenly wound on the outer surface of the ceramic matrix 1; wherein, the metal wire 2 is composed of a warp metal wire 21 and a weft metal wire 22; the warp metal wire 21 and the weft metal wire 22 do not intersperse with each other, and belong to an upper and lower layer relationship, and can be first wound with one or more layers of the warp metal wire 21, and then wound with one or more layers of the weft metal wire 22; repeat in sequence until the preset total thickness is reached.

[0056] In some embodiments, optionally, the ceramic matrix is ​​a single-phase or multi-phase ceramic, and the four sides of the ceramic matrix are arc edges, and the arc radius is 0.1<R≤0.5 times the thickness of the matrix. This setting can avoid winding and edge chipping.

[0057] In some embodiments, optionally, the ceramic matrix is ​​selected from one of alumina, zirconia, silicon carbide, silicon nitride toughened alumina, zirconia toughened alumina and boron nitride. These ceramic matrices have high strength and can be used in engineering, equipment and personal protection.

[0058] In some embodiments, optionally, the metal wire is made of aluminum alloy, stainless steel or Invar alloy, and the diameter of the metal wire is 0.1 mm to 2 mm; the metal wire cannot be too thin or too thick, as it is easy to break when winding if it is too thin, and too thick requires too much winding force and is inconvenient to operate.

[0059] like Figure 2A-2B As shown, some embodiments of the present invention further provide a hot wire winding device, including a moving platform 10, a control cabinet 20, a wire winding wheel 30, a metal wire 40, a tensioning mechanism 50, a heating box 60 and a winch 70; wherein,

[0060] The bottom of the mobile platform 10 is movably connected with four universal wheels to achieve free parallel movement;

[0061] A control cabinet 20 is welded on the movable platform 10; the control cabinet 20 is used to control the power on and off of the hot wire winding device, the tensioning force of the tensioning mechanism 50, the heating rate and preheating temperature of the heating box 60, the speed of the side motor 701 and the speed of the bottom motor 706;

[0062] The wire winding wheel 30 is connected to the upper surface of the movable platform 10 by bolts; the wire winding wheel 30 is used to wind the metal wire 40, and the wire winding wheel 30 can realize passive free rotation through the central axis;

[0063] The metal wire 40 has a diameter of 0.1 mm to 2 mm and is introduced by the winding wheel 30, passes through the tensioning mechanism 50 and the heating box 60, is clamped by the winch clamping fixture 703, and is then driven by the side motor 701 and the end motor 706 to be wound around the surface of the ceramic component.

[0064] A slide rail is fixed to the upper surface of the movable platform 10, and the tensioning mechanism 50 is connected to the slide rail by bolts. The tensioning mechanism 50 controls the closed loop of the tensioning clamp through the control cabinet 20 to achieve a firm clamping of the metal wire 40. The control cabinet 20 controls the slide rail motor to drive the slide rail to move, thereby achieving tensioning and stretching of the metal wire 40.

[0065] The heating box 60 is connected to the upper surface of the movable platform 10 by bolts; the heating box 60 is composed of a wire inlet nozzle 601, a heating chamber 602 and a wire outlet nozzle 603, and the wire inlet nozzle 601 and the wire outlet nozzle 603 are respectively connected to the outer wall of the heating chamber 602 by bolts; the heating chamber 602 is composed of an insulation layer, a resistance wire and a cavity from the inside to the outside;

[0066] The capstan 70 is connected to the upper surface of the movable platform 10 by bolts; the capstan 70 is composed of a side motor 701, a capstan bracket 702, a clamping fixture 703, a sliding guide rail 705 and an end motor 706; wherein, the side motor 701 and the capstan bracket 702 are connected to the sliding guide rail 705 by threads, and the side motor 701 drives the main shaft of the capstan bracket 702 to rotate; the clamping fixture 703 is connected to the main shaft of the capstan bracket 702 by a tripod chuck; the clamping fixture 703 is used to clamp the ceramic component 704; the sliding guide rail 705 and the end motor 706 are connected to the upper surface of the movable platform 10 by threads; the end motor 706 drives the sliding guide rail 705 to move back and forth in parallel, see Figure 2B .

[0067] Some embodiments of the present invention further provide a method for preparing a hot wire-wound prestressed composite ceramic, which comprises the following specific steps:

[0068] (1) Preparing a ceramic component to be wound 704;

[0069] (2) preparing the metal wire 2 to be wound;

[0070] (3) Clamp the ceramic component firmly on the winch fixture 703;

[0071] (4) The wire coil is clamped on the wire coil wheel 30, passed through the tensioning mechanism 50, and then led to the reel 70 with the ceramic component 704 clamped thereon;

[0072] (5) Turn on the heating power supply and heat the metal wire 2 to a preset temperature; set the tension to ensure that the metal wire 2 remains within the elastic deformation range at this temperature, and the tension can be adjusted within the range of 0kgf to 50kgf (according to Hooke's law, when subjected to external force, the metal has an elastic deformation stage, and when the external force is withdrawn, the metal can return to the state before the force is applied; different metal materials have different elastic deformation amounts and force ranges); the preset temperature can be adjusted within the range of room temperature to 500°C (preheating is to allow the metal wire to have a thermal expansion, and there will be a corresponding cooling contraction during the subsequent winding cooling process, while the ceramic component is not preheated and will not shrink. When the metal wire shrinks, the ceramic component does not shrink, so the metal wire will correspondingly form compressive stress on the surface of the ceramic component, thereby achieving the purpose of improving the bending strength of the composite ceramic);

[0073] (6) The side motor 701 of the winch bracket 702 drives the ceramic component 704 to rotate at a certain speed, which can be adjusted in the range of 1 to 100 rpm to achieve the winding of the metal wire; the end motor 706 of the sliding guide rail 705 drives the winch 70 to move back and forth, and the metal wire 2 completes the uniform warp coating of the surface of the ceramic component 704 under the hot stretching state (temperature is room temperature - 500 ° C, stretching force is 0 kgf to 50 kgf), and the reciprocating speed can be adjusted in the range of 1 to 10 m / s (to achieve the winding of the metal wire), and can achieve uniform or intermittent movement;

[0074] (7) vertically adjusting the clamping position of the ceramic component 704, repeating steps (4) to (6), and completing the uniform weft coating of the metal wire on the surface of the ceramic component 704 under the hot stretching state;

[0075] (8) Repeat steps (4) to (7) to complete the multi-layer two-dimensional uniform coating of the metal wire 2 on the surface of the ceramic component 704 under the hot stretching state, and obtain a hot wire wrapped prestressed composite ceramic.

[0076] In some embodiments, optionally, in step (1), the material of the ceramic component 704 can be one of alumina, zirconia, silicon carbide, silicon nitride, or zirconia-toughened alumina, boron nitride, etc.; the shape is generally a square plate, and the size can be adjusted as needed, for example, the conventional size is 205 mm×205 mm×10 mm.

[0077] In some embodiments, optionally, in step (2), the material of the metal wire can be aluminum alloy, stainless steel or Invar alloy, and the diameter of the metal wire can be 0.1 mm to 2 mm, and a wire with a diameter of 0.5 mm is generally selected.

[0078] The present invention will be further described below with reference to specific embodiments, but this should not be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0079] In the following examples of the present invention, unless otherwise specified, the components involved are commercially available products well known to those skilled in the art.

[0080] Example 1

[0081] This embodiment provides a method for preparing a hot wire-wound prestressed composite ceramic, which includes the following specific steps:

[0082] (1) Prepare the ceramic component to be wound, which is made of alumina and has a thickness of 10 mm;

[0083] (2) Prepare the metal wire to be wound. The material is stainless steel, the diameter is 0.5 mm, the metal wire is arranged in warp / weft, and the total number of metal wire layers is 2;

[0084] (3) Clamp the ceramic component firmly on the winch fixture;

[0085] (4) The wire coil is clamped on the wire coil wheel, passed through the tensioning mechanism, and then led to the winch with the ceramic component clamped on it through the heating box;

[0086] (5) Turn on the heating power supply and heat the metal wire to the preset temperature; set the tension to ensure that the metal wire remains within the elastic deformation range at this temperature. The tension is 30 kgf and the preset temperature is 100 °C.

[0087] (6) The side motor of the winch bracket drives the ceramic component to rotate at a certain speed, which is 50 rpm; the end motor of the sliding guide rail drives the winch to move back and forth, and the metal wire completes the uniform longitudinal coating of the surface of the ceramic component under the hot stretching state (temperature of 100 ° C, tensile force of 30 kgf), and the reciprocating speed is 30 m / s, and uniform or intermittent motion can be achieved;

[0088] (7) Vertically adjust the clamping position of the ceramic component and repeat steps (4) to (6) to complete the uniform weft coating of the metal wire on the surface of the ceramic component under hot stretching;

[0089] (8) Repeat steps (4) to (7) to complete the multi-layer two-dimensional uniform coating of the metal wire on the surface of the ceramic component under hot stretching state, obtain the hot wire wrapped prestressed composite ceramic, and test its impact strength. The test results are shown in Table 1.

[0090] Example 2

[0091] The difference between this embodiment and embodiment 1 is that the metal wire heating temperature in this embodiment is 200° C. The impact strength of the hot wire wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0092] Example 3

[0093] The difference between this embodiment and embodiment 1 is that the metal wire heating temperature in this embodiment is 300° C. The impact strength of the hot wire wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0094] Example 4

[0095] The difference between this embodiment and embodiment 1 is that the metal wire heating temperature in this embodiment is 400° C. The impact strength of the hot wire wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0096] Example 5

[0097] The difference between this embodiment and embodiment 1 is that the metal wire heating temperature in this embodiment is 500° C. The impact strength of the hot wire wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0098] Example 6

[0099] The difference between this embodiment and embodiment 3 is that the tensile force of the metal wire in the hot-stretched state in this embodiment is 10 kgf. The impact strength of the hot-wire-wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0100] Example 7

[0101] The difference between this embodiment and embodiment 6 is that the tensile force of the metal wire in the hot-stretched state in this embodiment is 20 kgf. The impact strength of the hot-wire-wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0102] Example 8

[0103] The difference between this embodiment and embodiment 6 is that the tensile force of the metal wire in the hot-stretched state in this embodiment is 40 kgf. The impact strength of the hot-wire-wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0104] Example 9

[0105] The difference between this embodiment and embodiment 6 is that the tensile force of the metal wire in the hot-stretched state in this embodiment is 50 kgf. The impact strength of the hot-wire-wound prestressed composite ceramic obtained in this embodiment was tested, and the test results are shown in Table 1.

[0106] Comparative Example 1

[0107] The difference between this comparative example and Example 1 is that this comparative example only includes ceramic components. The impact strength of the ceramic components obtained in this comparative example was tested, and the test results are shown in Table 1.

[0108] Table 1 Performance test of hot wire wound prestressed composite ceramics of Examples 1-9 of the present invention and Comparative Example 1

[0109]

[0110] It can be seen from the test data in Table 1 that compared with Comparative Example 1, the impact strength of the hot wire wound prestressed composite ceramics obtained in Examples 1-9 is greatly improved; however, when other parameters remain unchanged, the impact strength of the hot wire wound prestressed composite ceramics increases with the increase of the heating temperature of the metal wire; compared with Example 3, when other parameters remain unchanged, the bending strength of the hot wire wound prestressed composite ceramics obtained in Examples 8-9 is improved with the increase of the tensile force of the metal wire in the hot stretched state, and the bending strength of the obtained wire wound prestressed composite ceramics is reduced with the decrease of the tensile force of the metal wire in the hot stretched state. The main reason for the increase or decrease in mechanical properties is that within the elastic deformation range of the metal wire, the preheating temperature of the metal wire is increased, and its elastic deformation increases. After winding, during the cooling process, the metal wire needs to undergo a large shrinkage deformation stage, and the ceramic component has no deformation and shrinkage, which will hinder the shrinkage deformation of the metal wire. The corresponding metal wire will form a compressive stress on the ceramic surface, thereby improving the bending strength of the hot wire wound prestressed composite ceramic; accordingly, the tensile force decreases, the deformation of the metal wire deforms, and after winding, after the tensile force is unloaded, the shrinkage deformation of the metal wire is relatively small, and the corresponding compressive stress formed by the metal wire on the ceramic surface will also deform, thereby reducing the bending strength of the hot wire wound prestressed composite ceramic.

[0111] The hot wire wound prestressed composite ceramics obtained in Examples 1-9 of the present invention are mainly used for personal protection, armor protection and engineering protection.

[0112] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] It is understood that the related features in the above devices can be referenced to each other. In addition, the "first", "second", etc. in the above embodiments are used to distinguish between the embodiments, and do not represent the advantages and disadvantages of the embodiments.

[0114] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0115] The numerical ranges described in the present invention include all values ​​within the range, and include range values ​​formed by any two values ​​within the range. Different numerical values ​​of the same indicator appearing in all embodiments of the present invention can be arbitrarily combined to form a range value.

[0116] The technical features in the claims and / or the specification of the present invention may be combined, and the manner of combination is not limited to the combination obtained by reference in the claims. The technical solutions obtained by combining the technical features in the claims and / or the specification are also within the scope of protection of the present invention.

[0117] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a hot wire wound prestressed composite ceramic, characterized in that: The following steps are involved: (1) Prepare the ceramic parts to be wound; (2) Prepare the metal wire to be wound; (3) Clamp the ceramic component firmly on the winch fixture; (4) The wire coil is clamped on the wire coil wheel, passed through the tensioning mechanism, and then led to the winch with the ceramic component clamped on it through the heating box; (5) Turn on the heating power supply and heat the metal wire to the preset temperature; set the tension to ensure that the metal wire remains within the elastic deformation range at this temperature; (6) The side motor of the winch bracket drives the ceramic component to rotate at a speed of 0 to 100 rpm; the end motor of the sliding guide rail drives the winch to move back and forth, and the metal wire completes the uniform longitudinal coating of the surface of the ceramic component under the hot stretching state, and realizes uniform or intermittent movement; (7) Vertically adjust the clamping position of the ceramic component and repeat steps (4) to (6) to complete the uniform weft coating of the metal wire on the surface of the ceramic component under hot stretching; (8) Repeat steps (4) to (7) to complete the multi-layer two-dimensional uniform coating of the metal wire on the surface of the ceramic component under the hot stretching state, and obtain the hot wire wrapped prestressed composite ceramic.

2. The method for preparing a hot wire wound prestressed composite ceramic according to claim 1, wherein: In step (1), the material of the ceramic component is selected from one of alumina, zirconia, silicon carbide, silicon nitride toughened alumina, zirconia toughened alumina and boron nitride; the shape of the ceramic component is a square plate with a size of 205 mm×205 mm×10 mm.

3. The method for preparing hot wire wound prestressed composite ceramics according to claim 1, characterized in that: In step (2), the metal wire is made of aluminum alloy, stainless steel or Invar alloy, and its diameter is 0.1 mm to 2 mm.

4. The method for preparing a hot wire wound prestressed composite ceramic according to claim 1, wherein: In step (5), the tensioning force is 0kgf to 50kgf; the preset temperature is room temperature to 500°C; in step (6), the temperature of the metal wire in the hot-stretched state is room temperature-500°C, and the tensioning force is 0kgf to 50kgf; the round-trip speed of the uniform or intermittent motion is 1 to 10m / s.

5. A hot wire wound prestressed composite ceramic prepared by the method according to any one of claims 1 to 4, characterized in that: The hot wire wound prestressed composite ceramic comprises a ceramic matrix and metal wires, wherein the metal wires are uniformly wound around the outer surface of the ceramic matrix.

6. The hot wire wound prestressed composite ceramic according to claim 5, characterized in that: The metal wires are composed of warp metal wires and weft metal wires; the warp metal wires and weft metal wires do not intersperse with each other.

7. The hot wire wound prestressed composite ceramic according to claim 5, characterized in that: The ceramic matrix is ​​a single-phase or multi-phase ceramic; the four sides of the ceramic matrix are arc sides, and the arc radius is 0<R≤0.5 times the thickness of the matrix.

8. The hot wire wound prestressed composite ceramic according to claim 7, characterized in that: The ceramic matrix is ​​selected from one of alumina, zirconia, silicon carbide, silicon nitride toughened alumina, zirconia toughened alumina and boron nitride.

9. The hot wire wound prestressed composite ceramic according to claim 5, characterized in that: The metal wire is made of aluminum alloy, stainless steel or Invar alloy, and has a diameter of 0.1 mm to 2 mm.

10. A hot wire winding device, characterized in that: It includes a moving platform, a control cabinet, a wire coil, a metal wire, a tensioning mechanism, a heating box and a winch; among which, The bottom of the mobile platform is movably connected with four universal wheels; A control cabinet is welded on the movable platform; The wire wheel is connected to the upper surface of the movable platform by bolts and is passively free to rotate through the central axis; The diameter of the metal wire is 0.1mm to 2mm, and the metal wire is introduced by a wire winding wheel, passes through a tensioning mechanism and a heating box, is clamped by a winch clamping fixture, and is then wound on the surface of the ceramic component under the drive of a side motor and an end motor; A slide rail is fixed to the upper surface of the movable platform, and the tensioning mechanism is connected to the slide rail via bolts; The heating box is connected to the upper surface of the movable platform by bolts; the heating box consists of a wire inlet nozzle, a heating chamber and a wire outlet nozzle, and the wire inlet nozzle and the wire outlet nozzle are respectively connected to the outer wall of the heating chamber by bolts; the heating chamber is composed of an insulation layer, a resistance wire and a cavity from the inside to the outside; The capstan is connected to the upper surface of the movable platform by bolts; the capstan is composed of a side motor, a capstan bracket, a clamping fixture, a sliding guide rail and an end motor; wherein, the side motor and the capstan bracket are connected to the sliding guide rail by threads, and the clamping fixture is connected to the main shaft of the capstan bracket by a tripod chuck; the sliding guide rail and the end motor are connected to the upper surface of the movable platform by threads.

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