CN109759662B - Ultrasonic-assisted porous ceramic brazing method - Google Patents
Ultrasonic-assisted porous ceramic brazing method Download PDFInfo
- Publication number
- CN109759662B CN109759662B CN201910041473.9A CN201910041473A CN109759662B CN 109759662 B CN109759662 B CN 109759662B CN 201910041473 A CN201910041473 A CN 201910041473A CN 109759662 B CN109759662 B CN 109759662B
- Authority
- CN
- China
- Prior art keywords
- ceramic
- ultrasonic wave
- ultrasonic
- filler metal
- brazing filler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
An ultrasonic-assisted porous ceramic brazing method relates to a porous ceramic brazing method. The invention aims to solve the problems that the existing ceramic/ceramic welding needs a vacuum environment or needs to carry out certain metallization treatment on the surface of the ceramic, needs certain heat preservation time, and has low welding efficiency and low joint performance. The preparation method comprises the following steps: firstly, preprocessing a to-be-welded part; secondly, wetting the ceramic; and thirdly, welding the ceramics. Or the preparation method comprises the following steps: firstly, porous ceramic pretreatment; and secondly, welding the ceramics. The invention is used for ultrasonic-assisted porous ceramic brazing.
Description
Technical Field
The invention relates to a method for brazing porous ceramics.
Background
Ceramics have good mechanical properties and chemical stability at high temperatures, and are widely used in the fields of aerospace, nuclear industry and the like. Porous ceramics are favored for their high strength, high hardness, good corrosion resistance, and low density. Porous ceramics have poor extensibility, poor workability, and are difficult to machine, which makes the manufacture of ceramic composites and large-sized parts very difficult. However, many of the components in the manufacturing industry now involve connections between the porous ceramics, and between the porous ceramics/metals. Therefore, the invention discloses a method suitable for connecting the porous ceramics, which has great promotion effect on promoting the wide use of the porous ceramics. The current common welding methods of porous ceramics and ceramics mainly comprise diffusion welding, brazing and the like.
A wide range of researchers have used various methods to weld them, and a joint with few defects and high strength is desired. However, since the ceramic itself has good thermal stability and is a material that is extremely difficult to wet, the welding process generally requires a vacuum environment or a certain metallization treatment on the surface of the ceramic, and requires a certain heat preservation time, the welding efficiency is low, and the joint performance is not high. Therefore, the invention discloses a high-efficiency low-temperature porous ceramic welding method which can be carried out in the atmospheric environment.
Disclosure of Invention
The invention provides an ultrasonic-assisted porous ceramic brazing method, aiming at solving the problems that the conventional ceramic/ceramic welding needs a vacuum environment or needs to carry out certain metallization treatment on the surface of ceramic, needs certain heat preservation time, and has low welding efficiency and low joint performance.
An ultrasonic-assisted porous ceramic brazing method is carried out according to the following steps:
firstly, pretreatment of a to-be-welded part:
cleaning the surfaces of 2-20 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 10-90%;
secondly, wetting the ceramic:
placing the brazing filler metal in a brazing filler metal groove, heating to be molten, and then immersing the pretreated porous ceramic into the molten brazing filler metal for wetting under the ultrasonic vibration and the brazing filler metal melting temperature to obtain ultrasonically-assisted wetted ceramic;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is loaded for 1-100 s, then the ultrasonic wave loading is suspended for 10-100 s, and the ultrasonic wave loading and suspension are taken as a cycle, and the cycle is repeated for 2-10 times;
thirdly, welding the ceramics:
under the condition that the clamping force is 0.1-10 MPa, stacking and clamping 2-20 ultrasonically-assisted wetted ceramics, immersing the clamped ceramic piece into molten brazing filler metal at the melting temperature of the brazing filler metal to apply ultrasonic vibration, finally taking out the ultrasonically-assisted ceramic piece, cooling to room temperature, and removing the clamping force to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-100 s, then the ultrasonic wave application is suspended for 10-100 s, and the ultrasonic wave application and suspension are taken as a cycle, and the cycle is repeated for 2-10 times.
An ultrasonic-assisted porous ceramic brazing method is carried out according to the following steps:
firstly, porous ceramic pretreatment:
cleaning the surfaces of 2-20 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 10-90%;
secondly, welding of ceramics:
stacking 2-20 pretreated porous ceramics, arranging a brazing filler metal foil between adjacent pretreated porous ceramics, compacting under the condition that the compacting force is 0.1-10 MPa, heating the compacted ceramic piece until the brazing filler metal foil is molten, applying ultrasonic vibration to the compacted ceramic piece at the brazing filler metal melting temperature, finally taking out the ceramic piece after ultrasonic treatment, and keeping the compacting force at 0.1-10 MPa to compact and cool to room temperature to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
the thickness of the brazing filler metal foil is 0.1 mm-1 mm;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-100 s, then the ultrasonic wave application is suspended for 10-100 s, and the ultrasonic wave application and suspension are taken as a cycle, and the cycle is repeated for 2-10 times.
The mechanism of the invention is as follows: when a capillary tube is placed inside liquid water or molten metal that is subjected to ultrasonic vibrations, the water or metal rises along the inner wall of the conduit at a rapid rate, a phenomenon known as "sonocapillarity". In this process, the rise of the liquid in the capillary tube is independent of the wetting of the liquid with respect to the inner wall of the tube, in which case the liquid can still penetrate into the interior of the capillary tube. Generally, conventional solders have poor wettability to ceramics, and even if the ceramics are hot-dipped into the solders for a long period of time, the solders do not wet and penetrate into the ceramics. The problem that the liquid brazing filler metal is difficult to permeate into the porous ceramic can be well solved by utilizing the sound-induced capillary phenomenon. In addition, liquid brazing filler metal can produce the cavitation when experiencing ultrasonic vibration, and the collapse of cavitation bubble can produce the high temperature that local reaches several thousand degrees, also can produce the microjet that speed is very high, utilizes these two phenomena can solve the difficult moist problem in ceramic surface, realizes that the brazing filler metal is to the wetting of pottery. The gaps of the porous ceramics are generally smaller, and the narrow gaps can generate a sound cavitation phenomenon with stronger action, thereby being beneficial to the connection of the liquid solder and the ceramics.
The invention has the beneficial effects that:
1. the selection of the ceramic is flexible. The invention can weld any porous ceramics without the limitation of ceramic components.
2. The selection and the component proportion of the brazing filler metal are flexible. The invention can use any brazing filler metal, can be used at high and low temperatures, has flexible component proportion, and can be a single component or a composite brazing filler metal.
3. The temperature range in the welding process is wide. The invention can select proper brazing filler metal according to the use condition of the test piece, and then select the welding temperature according to the components of the brazing filler metal. For example, the soldering temperature of Sn-9Zn solder may be 200 ℃ or more, the soldering temperature of Zn-5Al solder may be 400 ℃ or more, and the soldering temperature of Al-12Si may be 600 ℃ or more.
4. The application position of the ultrasound is flexible. In the welding process, ultrasonic waves can be loaded on the ceramic and can also be applied on the clamp; the ultrasound may be applied continuously or intermittently.
5. The strength of the joint is high. The liquid brazing filler metal penetrates into the base metal to a certain depth through ultrasonic wave capillary and cavitation to form a compact composite material layer, the strength of the layer after welding is higher than that of the porous base metal, namely, the joint is broken from the base metal when stressed, and the strength of the base metal is improved by more than 32% after the liquid brazing filler metal penetrates into the base metal.
6. Low cost, strong adaptability and high welding efficiency. The welding can be finished in the atmospheric environment, the influence of the surrounding construction environment is hardly caused, and the heat insulation is not needed after the welding.
7. The invention has wide application range, is used for various complex parts with various thicknesses, and is suitable for welding the same or different porous ceramics.
The invention is used for an ultrasonic-assisted porous ceramic brazing method.
Drawings
FIG. 1 is a schematic view of an ultrasonic-assisted porous ceramic brazing process according to an embodiment, in which 1 is a molten brazing filler metal, 2 is a clamped ceramic part, 3 is an ultrasonic tool bit, 4 is a brazing filler metal groove, and 5 is a heating device;
FIG. 2 is a scanning electron microscope image of the cross-sectional morphology of a porous ceramic weldment weld prepared in the first example, where 1 is porous ceramic, 2 is the weld, and 3 is a diffusion layer;
FIG. 3 is a diagram of a crack propagation material after a shearing experiment of a porous ceramic weld assembly prepared in the first example, where 1 is porous ceramic, 2 is a weld joint, and 3 is a crack;
fig. 4 is a schematic diagram of the brazing process of the ultrasonic-assisted porous ceramic in the second embodiment, in which 1 is a brazing filler metal foil, 2 is porous ceramic, 3 is an ultrasonic tool head, 4 is a fixing device, and 5 is a heating device.
Detailed Description
The first embodiment is as follows: the method for ultrasonically assisting the porous ceramic brazing is carried out according to the following steps:
firstly, pretreatment of a to-be-welded part:
cleaning the surfaces of 2-20 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 10-90%;
secondly, wetting the ceramic:
placing the brazing filler metal in a brazing filler metal groove, heating to be molten, and then immersing the pretreated porous ceramic into the molten brazing filler metal for wetting under the ultrasonic vibration and the brazing filler metal melting temperature to obtain ultrasonically-assisted wetted ceramic;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is loaded for 1-100 s, then the ultrasonic wave loading is suspended for 10-100 s, and the ultrasonic wave loading and suspension are taken as a cycle, and the cycle is repeated for 2-10 times;
thirdly, welding the ceramics:
under the condition that the clamping force is 0.1-10 MPa, stacking and clamping 2-20 ultrasonically-assisted wetted ceramics, immersing the clamped ceramic piece into molten brazing filler metal at the melting temperature of the brazing filler metal to apply ultrasonic vibration, finally taking out the ultrasonically-assisted ceramic piece, cooling to room temperature, and removing the clamping force to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-100 s, then the ultrasonic wave application is suspended for 10-100 s, and the ultrasonic wave application and suspension are taken as a cycle, and the cycle is repeated for 2-10 times.
The beneficial effects of the embodiment are as follows: 1. the selection of the ceramic is flexible. This embodiment can weld any porous ceramic without being limited by the ceramic composition.
2. The selection and the component proportion of the brazing filler metal are flexible. Any brazing filler metal can be used in the embodiment, the brazing filler metal can be used at high and low temperatures, and the brazing filler metal is flexible in component proportion, can be a single component and can also be a composite brazing filler metal.
3. The temperature range in the welding process is wide. According to the embodiment, the proper brazing filler metal can be selected according to the using condition of the test piece, and then the welding temperature can be selected according to the components of the brazing filler metal. For example, the soldering temperature of Sn-9Zn solder may be 200 ℃ or more, the soldering temperature of Zn-5Al solder may be 400 ℃ or more, and the soldering temperature of Al-12Si may be 600 ℃ or more.
4. The application position of the ultrasound is flexible. In the welding process, ultrasonic waves can be loaded on the ceramic and can also be applied on the clamp; the ultrasound may be applied continuously or intermittently.
5. The strength of the joint is high. The liquid brazing filler metal penetrates into the base metal to a certain depth through ultrasonic wave capillary and cavitation to form a compact composite material layer, the strength of the layer after welding is higher than that of the porous base metal, namely, the joint is broken from the base metal when stressed, and the strength of the base metal is improved by more than 32% after the liquid brazing filler metal penetrates into the base metal.
6. Low cost, strong adaptability and high welding efficiency. The welding can be finished in the atmospheric environment, the influence of the surrounding construction environment is hardly caused, and the heat insulation is not needed after the welding.
7. The embodiment has wide application range, is used for various thicknesses and various complex parts, and is suitable for welding the same or different porous ceramics.
The second embodiment is as follows: the second embodiment is different from the first embodiment in that: the porous ceramic in the step one is Si3N4Ceramic, Si2N2O ceramic, SiC ceramic, SiBCN ceramic, ZrO2Ceramic, Al2O3Ceramic, TiB2Ceramics, B4C ceramic, ZrB2Ceramics, TaB2One or more of ceramic, ZrC ceramic, binary ceramic, ternary ceramic and quaternary ceramic. OthersThe same as in the second embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: when the use temperature of the porous ceramic welding part in the step three is below 190 ℃, the solder in the step two is Sn-based solder; when the use temperature of the porous ceramic welding part in the step three is below 380 ℃, the brazing filler metal in the step two is Zn-based brazing filler metal; and when the use temperature of the porous ceramic welding piece in the step three is below 600 ℃, the brazing filler metal in the step two is Al-based brazing filler metal. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the Sn-based brazing filler metal is Sn-9Zn brazing filler metal or Sn-4Cu brazing filler metal; the Zn-based brazing filler metal is Zn-5Al brazing filler metal; the Al-based brazing filler metal is Al-12Si brazing filler metal. The others are the same as the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: and step three, the cooling mode is water cooling or air cooling. The rest is the same as the first to fourth embodiments.
The sixth specific implementation mode: the method for ultrasonically assisting the porous ceramic brazing is carried out according to the following steps:
firstly, porous ceramic pretreatment:
cleaning the surfaces of 2-20 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 10-90%;
secondly, welding of ceramics:
stacking 2-20 pretreated porous ceramics, arranging a brazing filler metal foil between adjacent pretreated porous ceramics, compacting under the condition that the compacting force is 0.1-10 MPa, heating the compacted ceramic piece until the brazing filler metal foil is molten, applying ultrasonic vibration to the compacted ceramic piece at the brazing filler metal melting temperature, finally taking out the ceramic piece after ultrasonic treatment, and keeping the compacting force at 0.1-10 MPa to compact and cool to room temperature to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
the thickness of the brazing filler metal foil is 0.1 mm-1 mm;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-100 s, then the ultrasonic wave application is suspended for 10-100 s, and the ultrasonic wave application and suspension are taken as a cycle, and the cycle is repeated for 2-10 times.
The beneficial effects of the embodiment are as follows: 1. the selection of the ceramic is flexible. This embodiment can weld any porous ceramic without being limited by the ceramic composition.
2. The selection and the component proportion of the brazing filler metal are flexible. Any brazing filler metal can be used in the embodiment, the brazing filler metal can be used at high and low temperatures, and the brazing filler metal is flexible in component proportion, can be a single component and can also be a composite brazing filler metal.
3. The temperature range in the welding process is wide. According to the embodiment, the proper brazing filler metal can be selected according to the using condition of the test piece, and then the welding temperature can be selected according to the components of the brazing filler metal. For example, the soldering temperature of Sn-9Zn solder may be 200 ℃ or more, the soldering temperature of Zn-5Al solder may be 400 ℃ or more, and the soldering temperature of Al-12Si may be 600 ℃ or more.
4. The application position of the ultrasound is flexible. In the welding process, ultrasonic waves can be loaded on the ceramic and can also be applied on the clamp; the ultrasound may be applied continuously or intermittently.
5. The strength of the joint is high. The liquid brazing filler metal penetrates into the base metal to a certain depth through ultrasonic wave capillary and cavitation to form a compact composite material layer, the strength of the layer after welding is higher than that of the porous base metal, namely, the joint is broken from the base metal when stressed, and the strength of the base metal is improved by more than 32% after the liquid brazing filler metal penetrates into the base metal.
6. Low cost, strong adaptability and high welding efficiency. The welding can be finished in the atmospheric environment, the influence of the surrounding construction environment is hardly caused, and the heat insulation is not needed after the welding.
7. The embodiment has wide application range, is used for various thicknesses and various complex parts, and is suitable for welding the same or different porous ceramics.
The seventh embodiment: the sixth embodiment is different from the sixth embodiment in that: the porous ceramic in the step one is Si3N4Ceramic, Si2N2O ceramic, SiC ceramic, SiBCN ceramic, ZrO2Ceramic, Al2O3Ceramic, TiB2Ceramics, B4C ceramic, ZrB2Ceramics, TaB2One or more of ceramic, ZrC ceramic, binary ceramic, ternary ceramic and quaternary ceramic. The rest is the same as the sixth embodiment.
The specific implementation mode is eight: the sixth or seventh embodiment is different from the sixth or seventh embodiment in that: when the use temperature of the porous ceramic welding part in the step two is below 190 ℃, the solder foil is Sn-based solder; when the use temperature of the porous ceramic welding part in the step two is below 380 ℃, the brazing filler metal foil is Zn-based brazing filler metal; when the use temperature of the porous ceramic welding part in the step two is below 600 ℃, the brazing filler metal foil is Al-based brazing filler metal. The others are the same as the sixth or seventh embodiments.
The specific implementation method nine: this embodiment differs from one of the sixth to eighth embodiments in that: the Sn-based brazing filler metal is Sn-9Zn brazing filler metal or Sn-4Cu brazing filler metal; the Zn-based brazing filler metal is Zn-5Al brazing filler metal; the Al-based brazing filler metal is Al-12Si brazing filler metal. The others are the same as the embodiments six to eight.
The detailed implementation mode is ten: the present embodiment differs from one of the sixth to ninth embodiments in that: and the cooling mode of the step two is water cooling or air cooling. The others are the same as in the sixth to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
the first embodiment is as follows:
referring to fig. 1, the embodiment is specifically illustrated, and a method for ultrasonically assisted porous ceramic brazing is performed according to the following steps:
firstly, pretreatment of a to-be-welded part:
cleaning the surfaces of the 2 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 30%;
secondly, wetting the ceramic:
placing the brazing filler metal in a brazing filler metal groove, heating to be molten at the temperature of 420 ℃, and then immersing the pretreated porous ceramic into the molten brazing filler metal for wetting under the conditions of ultrasonic vibration and the temperature of 420 ℃ to obtain the ceramic subjected to ultrasonic-assisted wetting;
the ultrasonic vibration is continuously applied, and the ultrasonic is loaded for 120s under the conditions that the amplitude of the ultrasonic is 6 mu m, the frequency of the ultrasonic is 20kHz and the power of the ultrasonic is 1000W;
thirdly, welding the ceramics:
stacking and clamping 2 pieces of ultrasonically-assisted wetted ceramics under the condition that the clamping force is 0.2-0.4 MPa, immersing the clamped ceramic piece into molten solder at the temperature of 420 ℃ to apply ultrasonic vibration, finally taking out the ultrasonically-assisted ceramic piece, cooling to room temperature, and removing the clamping force to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
the ultrasonic vibration is continuously applied, and the ultrasonic is loaded for 120s under the conditions that the amplitude of the ultrasonic is 6 mu m, the frequency of the ultrasonic is 20kHz and the power of the ultrasonic is 1000W;
step one, the porous ceramic is ZrB2、SiC、TiB2And HfB2A quaternary ceramic of composition; said ZrB2:SiC:TiB2:HfB2In a volume ratio of 16:4:4: 1;
the brazing filler metal in the second step is Zn-5Al brazing filler metal;
the cooling mode in the third step is air cooling;
in the ultrasonic vibration of the embodiment, an ultrasonic tool bit is applied to a brazing filler metal groove;
by using the method of the embodiment, the porous ceramic welded joint with good weld formation and no defect inside can be obtained. The joints of different weld joint structures of the weld joint can be obtained by changing parameters such as ultrasonic time, power and the like;
in the figure 1, 1 is molten brazing filler metal, 2 is a clamped ceramic part, 3 is an ultrasonic tool head, 4 is a brazing filler metal groove, and 5 is a heating device;
FIG. 2 is a scanning electron microscope image of the cross-sectional morphology of a porous ceramic weldment weld prepared in the first example, where 1 is porous ceramic, 2 is the weld, and 3 is a diffusion layer; the liquid brazing filler metal is obtained by analyzing components of a scanning electron microscope, and the depth of the liquid brazing filler metal immersed into the porous ceramic is 42 microns;
fig. 3 is a diagram of a crack propagation object after a shearing experiment of the porous ceramic welding part prepared in the first example, wherein 1 is porous ceramic, 2 is a welding line, and 3 is a crack, the porous ceramic welding part prepared in the first example is subjected to a shearing test under the conditions that the welding size is 10mm × 10mm and the shearing speed is 1mm/min, and it can be seen from the diagram that the crack propagates from the inside of the ceramic matrix in the shearing process, the obtained shearing strength is 33MPa, which is higher than the strength (about 25MPa) of the quaternary ceramic itself in the present example, the strength of the joint at this time is higher than the strength of the ceramic itself, and after the liquid brazing filler metal permeates into the base metal, the strength of the base metal is further improved by about 32%.
Example two:
referring to fig. 4, the embodiment is specifically described, and a method for ultrasonically assisted porous ceramic brazing is performed according to the following steps:
firstly, porous ceramic pretreatment:
cleaning the surfaces of the 2 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 30%;
secondly, welding of ceramics:
stacking 2 pretreated porous ceramics, arranging a brazing filler metal foil between the 2 pretreated porous ceramics, compacting under the condition that the compacting force is 0.2-0.4 MPa, heating the compacted ceramic piece at the temperature of 200 ℃ until the brazing filler metal is molten, applying ultrasonic vibration to the compacted ceramic piece at the temperature of 200 ℃, finally taking out the ceramic piece after ultrasonic vibration, and keeping the compacting force at the condition that the compacting force is 0.2-0.4 MPa, compacting and cooling to room temperature to obtain a porous ceramic welding piece, namely completing the method for brazing the ultrasonic-assisted porous ceramics;
the thickness of the brazing filler metal foil is 1 mm;
the ultrasonic vibration is continuously applied, and the ultrasonic is loaded for 10s under the conditions that the amplitude of the ultrasonic is 10 mu m, the frequency of the ultrasonic is 30kHz and the power of the ultrasonic is 2000W;
step one, the porous ceramic is ZrB2、SiC、TiB2And HfB2A quaternary ceramic of composition; said ZrB2:SiC:TiB2:HfB2In a volume ratio of 16:4:4: 1;
the brazing filler metal foil is Sn-9Zn brazing filler metal;
and the cooling mode of the step two is air cooling.
In this example, 2 pieces of pretreated porous ceramics were placed with a brazing filler metal foil therebetween and placed in a fixture for preventing the porous ceramics from being positionally displaced during ultrasonic vibration in which an ultrasonic tool head is applied to a ceramic surface on one side and pressing force is applied by the ultrasonic tool head.
In fig. 4, 1 is a brazing filler metal foil, 2 is porous ceramic, 3 is an ultrasonic tool head, 4 is a fixing device, and 5 is a heating device.
By using the method of the embodiment, the joint with good weld formation and no defect in the interior can be obtained. When the method is used for welding, the ceramics do not need to be wetted in advance, and the welding efficiency can be further improved.
Claims (3)
1. An ultrasonic-assisted porous ceramic brazing method is characterized by comprising the following steps:
firstly, pretreatment of a to-be-welded part:
cleaning the surfaces of 2-20 porous ceramics by grinding, polishing and ultrasonic cleaning to obtain pretreated porous ceramics;
the porosity of the porous ceramic is 10-90%;
secondly, wetting the ceramic:
placing the brazing filler metal in a brazing filler metal groove, heating to be molten, and then immersing the pretreated porous ceramic into the molten brazing filler metal for wetting under the ultrasonic vibration and the brazing filler metal melting temperature to obtain ultrasonically-assisted wetted ceramic;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is loaded for 1-100 s, then the ultrasonic wave loading is suspended for 10-100 s, and the ultrasonic wave loading and suspension are taken as a cycle, and the cycle is repeated for 2-10 times;
thirdly, welding the ceramics:
under the condition that the clamping force is 0.1-10 MPa, stacking and clamping 2-20 ultrasonically-assisted wetted ceramics, immersing the clamped ceramic piece into molten brazing filler metal at the melting temperature of the brazing filler metal to apply ultrasonic vibration, finally taking out the ultrasonically-assisted ceramic piece, cooling to room temperature, and removing the clamping force to obtain a porous ceramic welding piece, namely completing the method for ultrasonically-assisted porous ceramic brazing;
when the ultrasonic vibration is continuously applied, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-1800 s;
when the ultrasonic vibration is applied in a gap, under the conditions that the amplitude of the ultrasonic wave is 0.1-100 mu m, the frequency of the ultrasonic wave is 15-50 kHz and the power of the ultrasonic wave is 100-2000W, the ultrasonic wave is applied for 1-100 s, then the ultrasonic wave application is suspended for 10-100 s, and the ultrasonic wave application and suspension are taken as a cycle, and the cycle is repeated for 2-10 times.
2. The method of claim 1 wherein step one said porous ceramic is Si3N4Ceramic, Si2N2O ceramic, SiC ceramic, SiBCN ceramic, ZrO2Ceramic, Al2O3Ceramic, TiB2Ceramics, B4C ceramic, ZrB2Ceramics, TaB2One or more of ceramics and ZrC ceramics.
3. The method of claim 1, wherein the cooling in step three is water cooling or air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041473.9A CN109759662B (en) | 2019-01-16 | 2019-01-16 | Ultrasonic-assisted porous ceramic brazing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041473.9A CN109759662B (en) | 2019-01-16 | 2019-01-16 | Ultrasonic-assisted porous ceramic brazing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109759662A CN109759662A (en) | 2019-05-17 |
| CN109759662B true CN109759662B (en) | 2020-07-07 |
Family
ID=66454052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910041473.9A Active CN109759662B (en) | 2019-01-16 | 2019-01-16 | Ultrasonic-assisted porous ceramic brazing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109759662B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347114B (en) * | 2020-04-09 | 2021-10-22 | 河南科技大学 | Ultrasonic-assisted solder spreading process observation device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568174A (en) * | 1978-11-15 | 1980-05-22 | Fuji Electric Co Ltd | Ultrasonic soldering method of ceramics element |
| JPH03103786A (en) * | 1989-09-19 | 1991-04-30 | Japan Radio Co Ltd | Ultrasonic probe |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
| CN105479030A (en) * | 2016-01-07 | 2016-04-13 | 哈尔滨工业大学 | Active anti-corrosion SnZn base brazing filler metal, manufacturing method thereof and low-temperature ultrasonic brazing method of ceramic and/or composite material and aluminum and magnesium alloy |
| CN105921839A (en) * | 2016-06-06 | 2016-09-07 | 哈尔滨工业大学（威海） | Kovar alloy and ceramic material ultrasonic brazing method |
| CN106563861A (en) * | 2016-10-19 | 2017-04-19 | 哈尔滨工业大学（威海） | Ultrasonic soldering method for fast forming ceramic-metal interconnection |
| CN106673685A (en) * | 2017-01-20 | 2017-05-17 | 哈尔滨工业大学 | Method for brazing AlON ceramics and boron nitride/silicon nitride composite ceramics by adopting Ag-Cu-Ti brazing filler metal |
-
2019
- 2019-01-16 CN CN201910041473.9A patent/CN109759662B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568174A (en) * | 1978-11-15 | 1980-05-22 | Fuji Electric Co Ltd | Ultrasonic soldering method of ceramics element |
| JPH03103786A (en) * | 1989-09-19 | 1991-04-30 | Japan Radio Co Ltd | Ultrasonic probe |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
| CN105479030A (en) * | 2016-01-07 | 2016-04-13 | 哈尔滨工业大学 | Active anti-corrosion SnZn base brazing filler metal, manufacturing method thereof and low-temperature ultrasonic brazing method of ceramic and/or composite material and aluminum and magnesium alloy |
| CN105921839A (en) * | 2016-06-06 | 2016-09-07 | 哈尔滨工业大学（威海） | Kovar alloy and ceramic material ultrasonic brazing method |
| CN106563861A (en) * | 2016-10-19 | 2017-04-19 | 哈尔滨工业大学（威海） | Ultrasonic soldering method for fast forming ceramic-metal interconnection |
| CN106673685A (en) * | 2017-01-20 | 2017-05-17 | 哈尔滨工业大学 | Method for brazing AlON ceramics and boron nitride/silicon nitride composite ceramics by adopting Ag-Cu-Ti brazing filler metal |
Non-Patent Citations (1)
| Title |
|---|
| "铝合金超声波钎焊过程中液态钎料的填缝及界面润湿行为";许志武等;《材料工程》;20101231;第1-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109759662A (en) | 2019-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102151930B (en) | Dissimilar metal material brazing method | |
| CN100363137C (en) | Filling composite welding flux vibrating liquid phase welding method for non-continuous strengthening aluminium base composite material | |
| CN102489813B (en) | Vacuum active brazing process of molybdenum-copper alloys and stainless steel | |
| CN102581414A (en) | Method for brazing copper aluminum tubes without aid of brazing flux | |
| CN106735833A (en) | Sound based on eutectic reaction causes instant liquid-phase diffusion welding welding method | |
| US8186566B2 (en) | Method for cohesively bonding metal to a non-metallic substrate | |
| CN102658411A (en) | Ultrasonic brazing method for high-volume-fraction silicon carbide particle enhanced aluminum-base composite and low-expansion alloy | |
| CN109759662B (en) | Ultrasonic-assisted porous ceramic brazing method | |
| Xu et al. | Soldering porous ceramics through ultrasonic-induced capillary action and cavitation | |
| CN108500411B (en) | Ultrasonic brazing device and method based on needle type welding head | |
| CN105921839B (en) | A kind of kovar alloy and ceramic material ultrasonic brazing method | |
| CN112975185B (en) | Device for electric field auxiliary ceramic quick connection | |
| CN111843165B (en) | Diffusion connection method for diamond micro-channel | |
| JP3573815B2 (en) | Cooling device manufacturing method | |
| CN111604558B (en) | Low-cost, self-activating method for welding ceramics and application thereof | |
| CN105290606A (en) | Friction stir welding method for foam aluminum material | |
| CN105694614A (en) | Aluminum and steel plate for ships, method for welding aluminum and steel plate and method for preparing paint | |
| CN105269105A (en) | High-silicon aluminum alloy welding method for forming particle-reinforced weld joints through thermo-acoustic coupling | |
| CN109836166B (en) | Electromagnetic ultrasonic brazing method for SiC ceramic | |
| CN111975202A (en) | Laser welding method for dissimilar metal materials | |
| CN108907492B (en) | Molybdenum/steel joint and preparation method thereof | |
| CN110899896B (en) | Welding fixture and method for brazing large-size aluminum alloy curved surface skin and ribbed framework structure | |
| CN108422057B (en) | Ultrasonic-assisted direct-current resistance brazing method for aluminum alloy | |
| CN113319418A (en) | Molybdenum-rhenium alloy interlayer-free diffusion bonding method | |
| Singh et al. | Study Of Diffusion Bonding Of WL10 To SS Joining With & Without Titanium Interlayer Using Thermo Mechanical Simulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |