Ultrafast controllable strengthening device for alumina-based composite ceramic
Through electromagnetic field-assisted heating and activation technology, a gradient oxide layer of alumina-based composite ceramic is formed, which solves the problems of insufficient thermal conductivity and reduced mechanical properties of alumina-based composite ceramics, and achieves the efficient mechanical performance enhancement of alumina-based composite ceramics.
Patent Information
- Application Number
- CN202421079504.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-16
AI Technical Summary
Alumina ceramics have shortcomings in thermal conductivity. Although the addition of Al N can improve this problem, it will lead to reduced mechanical properties. An efficient, controllable, simple and economical method is needed to strengthen the Al2O3-Al N complex phase. Mechanical properties of ceramics.
Electromagnetic field-assisted heating technology is used to achieve ultra-fast heating of alumina-based composite ceramics, and the surface oxidation reaction is accelerated through the principle of electromagnetic field activation to form a gradient oxide layer structure, thereby strengthening the mechanical properties of the material. The device includes a heating box, an image acquisition device and a temperature measuring device, which uses electromagnetic wave dielectric coupling and agitator to achieve uniform heating and real-time monitoring to control the combined stress of the oxide layer.
Ultra-fast heating and cooling of aluminum oxide-based composite ceramics is achieved, shortening the oxidation process time, reducing energy loss, and forming a gradient oxide layer structure, which significantly improves the mechanical properties of the material and saves the time and energy of the oxidation process.
Smart Images
Figure CN222279313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of ceramic materials, in particular to an ultra-fast controllable strengthening device for alumina-based multiphase ceramics. Background Art
[0002] Alumina ceramics are widely used ceramic materials with good mechanical strength, high temperature resistance, chemical resistance, wear resistance, and excellent electrical insulation. With the rapid development of electronic information technology, the requirements for the thermal conductivity of ceramic materials have increased. However, alumina ceramics still have shortcomings in thermal conductivity, but the introduction of Al N with high thermal conductivity can effectively solve this defect. However, the addition of Al N will cause Al N to 2 O 3 The mechanical properties of ceramics are reduced, so an efficient, controllable, simple and economical device and method are needed to strengthen Al 2 O 3 -Mechanical properties of AlN composite ceramics. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an ultra-fast controllable strengthening device for alumina-based composite ceramics. The ultra-fast controllable strengthening device utilizes electromagnetic field assisted heating technology to achieve ultra-fast heating of the material; at the same time, with the help of the electromagnetic field activation principle, the surface oxidation reaction process is accelerated to form a gradient oxide layer structure in a short time.
[0004] The technical solution of the utility model to solve the above technical problems is:
[0005] An ultra-fast controllable strengthening device for alumina-based composite ceramics comprises a furnace body, a heating device arranged on the furnace body for heating a sample, an image acquisition device for acquiring an image of the sample, and a temperature measuring device for detecting the temperature of the sample, wherein the heating device comprises a heating box and a heating module; the sample to be heated is placed in the inner cavity of the heating box; the heating module comprises a waveguide and an electromagnetic wave generating device arranged on the left and right sides of the furnace body, wherein the waveguides on the left and right sides of the furnace body are a horizontal waveguide and a vertical waveguide, respectively; the electromagnetic wave generated by the electromagnetic wave generating device enters the furnace body through the horizontal waveguide and the vertical waveguide.
[0006] As a preferred solution, the heating box is made of high dielectric loss auxiliary heating material.
[0007] As a preferred solution, an opening is provided in the heating box, and the sample is placed in the inner cavity of the heating box and supported by a support block.
[0008] As a preferred solution, a visualization window is provided on the furnace cover at a position corresponding to the opening.
[0009] As a preferred solution, the outer layer of the heating box is provided with a heat-insulating structure.
[0010] As a preferred solution, electromagnetic wave stirrers are respectively provided on the upper and lower sides of the furnace body.
[0011] As a preferred solution, the image acquisition device is a high-resolution industrial camera, and the high-resolution industrial camera is arranged on the furnace cover of the furnace body, and the shooting port of the high-resolution industrial camera faces the visualization window.
[0012] As a preferred solution, the temperature measuring device is an infrared temperature measuring device.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1. The ultra-fast controllable strengthening device for alumina-based composite ceramics of the utility model is to strengthen Al 2 O 3 -AlN composite ceramics were subjected to electromagnetic field assisted ultra-fast heating treatment to induce Al 2 O 3 -AlN composite ceramic samples form a gradient oxidation prestressed layer from the outside to the inside, thereby achieving overall strengthening of the material.
[0015] 2. The ultra-fast controllable strengthening device for alumina-based composite ceramics of the utility model utilizes electromagnetic field assisted heating technology to strengthen Al 2 O 3 -Al N composite ceramics are treated at high temperature to achieve Al 2 O 3 -Al N composite ceramic samples are heated and cooled very quickly. The ultra-fast heating and cooling can greatly save the time of the oxidation process and greatly reduce energy loss. At the same time, the surface oxidation reaction process is accelerated by the principle of electromagnetic field activation, and the oxidation insulation time is shortened to form a gradient oxidation layer structure. During the electromagnetic field-assisted ultra-fast gradient oxidation process, the sample temperature and deformation are monitored in situ through the temperature measurement device and the image acquisition device, and the real-time data collection and analysis of the sample gradient oxidation start and end temperature and oxidation expansion are realized, and finally the process and effect of gradient oxidation layer stress strengthening are accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1-Figure 2 The schematic diagrams are structural diagrams of the ultra-fast controllable strengthening device of alumina-based composite ceramics from two different perspectives of the utility model.
[0017] Figure 3-Figure 4Schematic diagrams of the internal structure of the ultra-fast controllable strengthening device for alumina-based composite ceramics from two different perspectives of the utility model. DETAILED DESCRIPTION
[0018] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.
[0019] See also Figure 1-Figure 4 The ultra-fast controllable strengthening device of alumina-based composite ceramics of the utility model comprises a furnace body 1, a heating device arranged on the furnace body 1 for heating a sample 10, an image acquisition device for acquiring an image of the sample 10, and a temperature measuring device for detecting the temperature of the sample 10, wherein:
[0020] The heating device comprises a heating box 8 and a heating module, wherein the heating box 8 is made of a high dielectric loss auxiliary heat material, an opening is provided in the heating box 8, and a visualization window 7 is provided on the furnace cover 4 at a position corresponding to the opening; the sample 10 to be heated is placed in the inner cavity of the heating box 8 and supported by a high temperature resistant support block;
[0021] The heating module includes a waveguide tube and an electromagnetic wave generating device arranged on the left and right sides of the furnace body 1, wherein the waveguide tubes on the left and right sides of the furnace body 1 are respectively a horizontal waveguide tube 2 and a vertical waveguide tube 3; the electromagnetic waves generated by the electromagnetic wave generating device enter the furnace body 1 through the horizontal waveguide tube 2 and the vertical waveguide tube 3; and electromagnetic wave stirrers 11 are respectively arranged on the upper and lower sides of the furnace body 1.
[0022] See also Figure 1-Figure 4The ultra-fast controllable strengthening device of alumina-based composite ceramics of the utility model is based on the principle of electromagnetic dielectric coupling heating and electromagnetic activation to achieve ultra-fast heating and gradient oxidation of composite ceramics; wherein, the sample 10 is placed in a heating box 8 composed of a high dielectric loss auxiliary heat material, and the heating box 8 efficiently generates heat through electromagnetic coupling and radiates it to the surface of the sample 10, thereby achieving ultra-fast heating and oxidation of the sample 10; as the temperature of the gradient oxidation treatment increases, the dielectric loss of the sample 10 increases, and it itself can also couple with electromagnetic waves to achieve efficient self-volume heating; the thermal insulation structure 9 covers the heating box 8 to prevent the temperature from diffusing outwards while , which can reduce heat loss; accelerate the establishment of thermal equilibrium between the sample 10 and the surrounding environment; the electromagnetic wave enters the cavity of the furnace body 1 through the waveguides on both sides, and the waveguides on both sides are respectively arranged in a vertical manner and a horizontal manner, the purpose of which is to make the electromagnetic wave fed into the furnace cavity have two different vibration directions at the same time, thereby improving the uniformity of the dielectric coupling of the electromagnetic wave; at the same time, in order to further optimize the distribution state of the electromagnetic wave in the furnace cavity, an electromagnetic wave stirrer 11 is respectively arranged at the upper and lower positions of the center of the furnace cavity, and the rotation movement of the electromagnetic wave stirrer 11 makes the internal electromagnetic field distribution more uniform, and the coupling of the heating box 8 and the sample 10 with the electromagnetic field is more efficient.
[0023] In the process of ultra-fast gradient oxidation lamination stress strengthening, the visualization window 7 set on the furnace cover 4 can be used to realize real-time image acquisition and surface temperature measurement of the sample 10 by using a non-contact image acquisition device and a temperature measurement device; wherein the image acquisition device is a high-resolution industrial camera 5, and the temperature measurement device is an infrared temperature measurement device 6; the infrared temperature measurement device 6 realizes the real-time measurement of the temperature of the sample 10 under ultra-fast heating; the high-resolution industrial camera 5 can collect high-pixel images of the sample in real time during the ultra-fast heating and gradient oxidation process; the measured temperature data and image data are transmitted to the computer for data processing and analysis. Through real-time data processing, the expansion size of the sample 10 at the corresponding heating temperature can be obtained, the temperature-geometric deformation curve can be drawn, the deformation trend change of the material during the gradient oxidation process can be analyzed to obtain the starting temperature and starting time node, and the temperature and time node for obtaining the maximum strengthening effect can be predicted through the curve change trend.
[0024] Then, the output power of the electromagnetic wave is controlled to adjust the heating process, which can effectively control the gradient oxidation layer stress strengthening process and achieve the expected strengthening effect. By analyzing the in-situ deformation data of the gradient oxidation composite ceramics in the air environment; the electromagnetic field assisted ultra-fast heating treatment of the composite ceramics under air conditions can find that after reaching the gradient oxidation starting temperature, the deformation of sample 10 is not only thermal expansion, but also includes the deformation caused by oxidation. Therefore, in the drawn geometric deformation curve, when the oxidation reaction is violent, the slope of the deformation curve also changes significantly.
[0025] The above is a preferred implementation mode of the present invention, but the implementation mode of the present invention is not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.
Claims
1. An ultra-fast controllable strengthening device for alumina-based composite ceramics, characterized in that: It includes a furnace body, a heating device arranged on the furnace body for heating a sample, an image acquisition device for acquiring an image of the sample, and a temperature measuring device for detecting the temperature of the sample, wherein the heating device includes a heating box and a heating module; the sample to be heated is placed in the inner cavity of the heating box; the heating module includes a waveguide and an electromagnetic wave generating device arranged on the left and right sides of the furnace body, wherein the waveguides on the left and right sides of the furnace body are a horizontal waveguide and a vertical waveguide, respectively; the electromagnetic wave generated by the electromagnetic wave generating device enters into the furnace body through the horizontal waveguide and the vertical waveguide.
2. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 1, characterized in that: The heating box is made of high dielectric loss auxiliary heat material.
3. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 1, characterized in that: The heating box is provided with an opening, and the sample is placed in the inner cavity of the heating box and supported by a supporting block.
4. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 3, characterized in that: A visualization window is arranged on the furnace cover of the furnace body at a position corresponding to the opening.
5. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 1, characterized in that: The outer layer of the heating box is provided with a heat preservation structure.
6. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 1, characterized in that: Electromagnetic wave stirrers are respectively arranged on the upper and lower sides of the furnace body.
7. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 4, characterized in that: The image acquisition device is a high-resolution industrial camera, which is arranged on the furnace cover of the furnace body, and the shooting port of the high-resolution industrial camera faces the visualization window.
8. The ultra-fast controllable strengthening device for alumina-based composite ceramics according to claim 1, characterized in that: The temperature measuring device is an infrared temperature measuring device.