CN110026634B - Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal - Google Patents

Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal Download PDF

Info

Publication number
CN110026634B
CN110026634B CN201910392640.4A CN201910392640A CN110026634B CN 110026634 B CN110026634 B CN 110026634B CN 201910392640 A CN201910392640 A CN 201910392640A CN 110026634 B CN110026634 B CN 110026634B
Authority
CN
China
Prior art keywords
composite material
temperature
filler metal
brazing filler
brazing
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
Application number
CN201910392640.4A
Other languages
Chinese (zh)
Other versions
CN110026634A (en
Inventor
李淳
贺宗晶
曹健
兰博
亓钧雷
冯吉才
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Original Assignee
Harbin Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN201910392640.4A priority Critical patent/CN110026634B/en
Publication of CN110026634A publication Critical patent/CN110026634A/en
Application granted granted Critical
Publication of CN110026634B publication Critical patent/CN110026634B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Ceramic Products (AREA)

Abstract

Carbon fiber reinforced carbon-based composite material (C) brazed by using Si-Zr high-temperature brazing filler metalfA method of/C), relating to an applicationA method for brazing carbon fiber reinforced carbon-based composite material by high-temperature brazing filler metal. The invention aims to solve the problem of the prior CfThe use temperature of the/C composite material soldered joint is low, and the high-temperature mechanical property is poor. The invention comprises the following steps: firstly, preparing Si-Zr brazing filler metal; secondly, preparing brazing filler metal sheets; third, braze welding Cfa/C composite material. The invention adopts Si-Zr high-temperature solder to realize the braze welding connection of the carbon fiber reinforced carbon-based composite material at 1400-1480 ℃, and solves the problem of CfThe problem of poor high-temperature mechanical property of the/C composite material soldered joint is solved, and the problem that the complex C cannot be connected by a large-pressure applying connection method is avoidedfComposite component and high-pressure pair CfThe problem that the/C composite material is easy to damage is solvedfthe/C composite material is applied to the high-temperature fields of aerospace, nuclear power and the like.

Description

Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal
Technical Field
The invention relates to a method for brazing a carbon fiber reinforced carbon-based composite material by using high-temperature brazing filler metal.
Background
Carbon fiber reinforced carbon-based composite material (C)fthe/C composite material) has the characteristics of low density, high specific strength, low thermal expansion coefficient, excellent high-temperature mechanical property and the like, has wide application in the fields of aerospace and nuclear power, and some developed countries adopt C in the thermal structures, thermal protection and other parts of various types of spacecrafts and solid rocket enginesfa/C composite material. However, in order to make Cfthe/C composite material meets the severer service environment in engineering and needs to be prepared into a large-size component with a complex shape. In practical applications, the simple shape of C is generally connected by two timesfthe/C composite material is used for obtaining the required member.
With respect to CfThe connection of the/C composite material, scholars at home and abroad have carried out a great deal of related research work due to CfThe melting point of the/C composite material is very high, and the connection by fusion welding is difficult to realize. Existing joining methods include diffusion welding, vacuum hot pressing, electric field assisted sintering, self-propagating reaction, transient liquid phase joining, and brazing. According to the literature report, the brazing method has simple operation, low cost and lower requirement on the shape of the base material component, and becomes CfThe conventional connection methods for the/C composite materials. In the current research, the C is realized by mainly adopting brazing filler metals such as Ag-Cu-Ti, Ti-Zr-Ni-Cu, Ti-Cu-Ni and the likefThe brazing connection of the/C composite material is realized, but the joint can only be used under the condition of medium and low temperature and cannot exert Cfthe/C composite material has excellent high-temperature mechanical behavior. In the field of high temperature brazing, Si-Ti and TiSi are used only by He, Dadras and Salvo et al, respectively2And Si piece, for CfThe high temperature brazing connection research of the/C composite material is relatively lacked. It has been reported that the Si-Zr based alloy pair Cfthe/C composite material has good wetting and infiltration behaviors, and the Si-Zr alloy has a higher melting point.
Disclosure of Invention
The invention aims to solve the problem of the prior CfThe technical problems of low use temperature and poor high-temperature mechanical property of a/C composite material soldered joint are solved, and the method for soldering the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature solder is provided.
The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal comprises the following steps of:
firstly, preparing Si-Zr solder: polishing the surfaces of Zr sheets or Zr grains to remove oxide skin, then loading the Si blocks and the Zr sheets or Zr grains with the oxide skin removed into an electric arc melting device, melting and alloying by adopting electric arc heating under the vacuum condition, repeatedly melting for 5-7 times, and naturally cooling to obtain the Si-Zr high-temperature brazing filler metal; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22-32%;
secondly, preparing brazing filler metal sheets: cutting the Si-Zr high-temperature brazing filler metal prepared in the first step into sheets by adopting linear cutting equipment, polishing to remove oxide skin, then placing the sheets in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, and drying to obtain Si-Zr brazing filler metal sheets;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfthe/C composite material is used as a base material, and the Si-Zr brazing filler metal sheets prepared in the step two are fixed between two base materials to be assembled into a sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 10min to 30min under vacuum or protective atmosphere and at the temperature of 300 ℃, heating the sandwich structure to 1400 ℃ to 1480 ℃ at the heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 5min to 12min under vacuum or protective atmosphere and at the temperature of 1400 ℃ to 1480 ℃, cooling the sandwich structure to 300 ℃ at the cooling rate of 5 ℃/min under vacuum or protective atmosphere, and then furnace-cooling to room temperature under vacuum or protective atmosphere to finish CfAnd (3) a brazing process of the/C composite material.
The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal can be further carried out according to the following steps:
firstly, the method comprises the following steps: weighing Zr powder or ZrH2Taking the powder as a Zr source, weighing Si powder as the Si source, and then fully mixing and homogenizing the powder by adopting grinding and ball milling treatment to obtain Si-Zr high-temperature solder powder; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22-32%;
II, secondly: pressing the Si-Zr high-temperature brazing filler metal powder prepared in the step one into a sheet Si-Zr brazing filler metal by using a tablet press, or uniformly mixing an organic binder and the Si-Zr high-temperature brazing filler metal powder prepared in the step one into slurry; the mass fraction of the organic binder in the slurry is 5-20%;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfFixing the sheet Si-Zr brazing filler metal or slurry prepared in the second step between two base metals to assemble a sandwich structure by using the/C composite material as the base metalOr coating the slurry prepared in the second step between two base materials to assemble a sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 10min to 30min under vacuum or protective atmosphere and at the temperature of 300 ℃, heating the sandwich structure to 1400 ℃ to 1480 ℃ at the heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 10min to 12min under vacuum or protective atmosphere and at the temperature of 1400 ℃ to 1480 ℃, cooling the sandwich structure to 300 ℃ at the cooling rate of 5 ℃/min under vacuum or protective atmosphere, and then furnace-cooling to room temperature under vacuum or protective atmosphere to finish CfAnd (3) a brazing process of the/C composite material.
The invention has the following beneficial effects:
the invention adopts Si-Zr high-temperature solder to realize the braze welding connection of the carbon fiber reinforced carbon-based composite material at 1400-1480 ℃, and solves the problem of the existing CfThe technical problem that the high-temperature mechanical property of the/C composite material soldered joint is not sufficiently researched is solved, and the problem that the complex C cannot be connected by a large-pressure applying connection method is avoidedfComposite component and high-pressure pair CfThe problem that the/C composite material is easy to damage is solved, thereby further exploiting Cfthe/C composite material is applied to the high-temperature fields of aerospace, nuclear power and the like.
Compared with the existing brazing filler metal, the Si-Zr high-temperature brazing filler metal prepared by the invention has the advantages of simple preparation method, better fluidity and capability of brazing the base metal Cfthe/C composite material has excellent high-temperature wettability and infiltration performance and is prepared by brazing filler metal and Cfthe/C composite material has sufficient interface reaction to generate SiC high-temperature ceramic phase, the joint structure is compact and has no defect, and the bonding strength of the joint is improved.
The high-temperature brazing method adopted by the invention effectively improves CfThe connection quality of the/C composite material is that the room temperature strength of the joint is 27 MPa-32 MPa; the shear strength is 26.8MPa when the test is carried out at 1000 ℃, and the high-temperature mechanical property is shown.
Drawings
FIG. 1 shows test A and test BfScanning structure photo of the soldering joint of the/C composite material;
FIG. 2 shows test A and test BfPhase analysis diagram of shear fracture of brazed joint of/C composite material.
Detailed Description
The first embodiment is as follows: the embodiment is a method for brazing a carbon fiber reinforced carbon-based composite material by using a Si-Zr high-temperature brazing filler metal, which specifically comprises the following steps:
firstly, preparing Si-Zr solder: polishing the surfaces of Zr sheets or Zr grains to remove oxide skin, then loading the Si blocks and the Zr sheets or Zr grains with the oxide skin removed into an electric arc melting device, melting and alloying by adopting electric arc heating under the vacuum condition, repeatedly melting for 5-7 times, and naturally cooling to obtain the Si-Zr high-temperature brazing filler metal; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22-32%;
secondly, preparing brazing filler metal sheets: cutting the Si-Zr high-temperature brazing filler metal prepared in the first step into sheets by adopting linear cutting equipment, polishing to remove oxide skin, then placing the sheets in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, and drying to obtain Si-Zr brazing filler metal sheets;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfthe/C composite material is used as a base material, and the Si-Zr brazing filler metal sheets prepared in the step two are fixed between two base materials to be assembled into a sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 10min to 30min under vacuum or protective atmosphere and at the temperature of 300 ℃, heating the sandwich structure to 1400 ℃ to 1480 ℃ at the heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 5min to 12min under vacuum or protective atmosphere and at the temperature of 1400 ℃ to 1480 ℃, cooling the sandwich structure to 300 ℃ at the cooling rate of 5 ℃/min under vacuum or protective atmosphere, and then furnace-cooling to room temperature under vacuum or protective atmosphere to finish Cfof/C composite materialsAnd (4) brazing process.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: and in the second step, the mixture is placed in absolute ethyl alcohol for ultrasonic cleaning for 8 min. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: and the protective atmosphere in the third step is nitrogen or argon. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the embodiment is a method for brazing a carbon fiber reinforced carbon-based composite material by using a Si-Zr high-temperature brazing filler metal, which specifically comprises the following steps:
firstly, the method comprises the following steps: weighing Zr powder or ZrH2Taking the powder as a Zr source, weighing Si powder as the Si source, and then fully mixing and homogenizing the powder by adopting grinding and ball milling treatment to obtain Si-Zr high-temperature solder powder; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22-32%;
II, secondly: pressing the Si-Zr high-temperature brazing filler metal powder prepared in the step one into a sheet Si-Zr brazing filler metal by using a tablet press, or uniformly mixing an organic binder and the Si-Zr high-temperature brazing filler metal powder prepared in the step one into slurry; the mass fraction of the organic binder in the slurry is 5-20%;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfFixing the flaky Si-Zr brazing filler metal or the slurry prepared in the step two between two base metals to form a sandwich structure or coating the slurry prepared in the step two between the two base metals to form the sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving the heat for 10min to 30min under the conditions of vacuum or protective atmosphere and 300 ℃, heating the sandwich structure to 1400 ℃ to 1480 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, and heating the sandwich structure to 1400 ℃ to 1480 ℃ under vacuum or protective atmosphere and at 1400 ℃ to 1480 DEG CKeeping the temperature for 10min to 12min under the condition of (1), cooling to 300 ℃ at the cooling rate of 5 ℃/min under the vacuum or protective atmosphere, and then cooling to room temperature along with the furnace under the vacuum or protective atmosphere to finish CfAnd (3) a brazing process of the/C composite material.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that: the organic binder in the second step is glycol or hydroxyethyl cellulose water solution with the mass fraction of 2%. The rest is the same as the fourth embodiment.
The sixth specific implementation mode: the fourth or fifth embodiment is different from the specific embodiment in that: and the protective atmosphere in the third step is nitrogen or argon. The others are the same as the fourth or fifth embodiments.
The invention was verified with the following tests:
test one: the test is a method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal, and the method is specifically carried out according to the following steps:
firstly, preparing Si-Zr solder: polishing the surface of the Zr sheet to remove oxide skin, then putting the Si block and the Zr sheet with the oxide skin removed into an arc melting device, melting and alloying by adopting arc heating under the vacuum condition, repeatedly melting for 6 times, and naturally cooling to obtain the eutectic Si-10Zr high-temperature brazing filler metal; the mass fraction of Zr element in the eutectic Si-10Zr high-temperature solder is 27%;
secondly, preparing brazing filler metal sheets: cutting the eutectic Si-10Zr high-temperature brazing filler metal prepared in the step one into sheets by adopting linear cutting equipment, polishing to remove oxide skin, then placing the sheets in absolute ethyl alcohol for ultrasonic cleaning for 10min, and drying to obtain an Si-10Zr eutectic brazing filler metal sheet; the size of the Si-10Zr eutectic brazing sheet is 5.5mm multiplied by 400 mu m;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol, ultrasonically cleaning for 10min, blow-drying, and placing two C to be weldedfthe/C composite material is used as a base material, and the Si-10Zr eutectic brazing filler metal sheet prepared in the step two is fixed between two base materials to be assembled into a sandwich structure; fixing the sandwich structure with graphite mold, and placingHeating to 300 ℃ from room temperature at a heating rate of 10 ℃/min in a protective atmosphere in an atmosphere furnace, preserving heat for 30min at 300 ℃ in the protective atmosphere, heating to 1400 ℃ at a heating rate of 5 ℃/min in the protective atmosphere, preserving heat for 10min at 1400 ℃ in the protective atmosphere, cooling to 300 ℃ at a cooling rate of 5 ℃/min in the protective atmosphere, and cooling to room temperature in the protective atmosphere along with the furnace to finish Cfa/C composite material brazing process; the protective atmosphere is argon; the dimensions of the base material are 5mm × 5mm × 5 mm.
The joint performance is evaluated by adopting the compression shear strength, and the room temperature strength of the obtained joint is 27.5 MPa.
And (2) test II: this test differs from the test one in that: and step three, preserving the heat for 10min under the condition of protective atmosphere and temperature of 1420 ℃. The rest were the same as test one.
The joint performance is evaluated by adopting the compression shear strength, and the room temperature strength of the obtained joint is 27.4 MPa.
And (3) test III: this test differs from the test one in that: and step three, preserving the heat for 10min under the condition of protective atmosphere and temperature of 1440 ℃. The rest were the same as test one.
The joint performance is evaluated by adopting the compression shear strength, and the room temperature strength of the obtained joint is 29.1 MPa.
And (4) testing: this test differs from the test one in that: and in the third step, the temperature is kept for 10min under the condition of protective atmosphere and 1460 ℃. The rest were the same as test one.
The joint performance is evaluated by adopting the compression shear strength, and the room temperature strength of the obtained joint is 32.4 MPa.
The shear strength is 26.8MPa when the test is carried out at 1000 ℃, and the high-temperature mechanical property is shown.
And (5) testing: this test differs from the test one in that: and in the third step, the temperature is kept for 10min under the condition of protective atmosphere and 1480 ℃. The rest were the same as test one.
The joint performance is evaluated by adopting the compression shear strength, and the room temperature strength of the obtained joint is 31.3 MPa.
FIG. 1 shows a test barWelded CfScanning structure photograph of brazed joint of/C composite material, the midpoint of + represents the specific position of three test points (A, B and C), the area D is welding seam, the area E is Cfthe/C composite material, C being evident from FIG. 1fThe soldered joint of the/C composite material has good connection quality, and the eutectic Si-10Zr high-temperature solder is infiltrated into C on two sidesfIn the porous structure of the/C composite material, the pinning effect can improve the connection strength of the joint. Table 1 is a table of EDS analysis data at points A, B and C in FIG. 1, and in combination with the energy spectrum analysis in Table 1, it can be seen that the brazing seam is formed by ZrSi2Eutectic structure of phase and Si matrix, solder and CfA compact SiC interface layer is formed between the parent metals of the/C composite material, and the parent metals are continuous and have no cracks; ZrSi in SiC interface and brazing seam2Eutectic structure of-Si and infiltration into CfThe brazing filler metal in the/C composite material jointly enhances the performance of the joint.
TABLE 1
Figure BDA0002057092530000061
FIG. 2 shows test A and test BfPhase analysis diagram of a shear fracture of a brazed joint of a/C composite material, C in a, SiC in a, Si in a star, ZrSi in a star2From FIG. 2, it can be seen that the section is C, ZrSi2Si and SiC phases, which show that cracks penetrate through C during compression-shear fracture of the soldered jointfthe/C matrix, the interface reaction layer and the braze, this mixed fracture mode favours the strengthening of the joint, which further demonstrates the phase analysis in table 1.

Claims (6)

1. A method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal is characterized in that the brazing filler metal and C are formed by active elements Si and Zrfthe/C composite material undergoes an interfacial chemical reaction to form Cf/C/SiC/Si-ZrSi2/SiC/CfThe structure of the structure;
form Cf/C/SiC/Si-ZrSi2/SiC/CfThe structure of the/C is specifically carried out according to the following steps:
firstly, preparing Si-Zr solder: polishing the surfaces of Zr sheets or Zr grains to remove oxide skin, then loading the Si blocks and the Zr sheets or Zr grains with the oxide skin removed into an electric arc melting device, melting and alloying by adopting electric arc heating under the vacuum condition, repeatedly melting for 5-7 times, and naturally cooling to obtain the Si-Zr high-temperature brazing filler metal; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22-32%;
secondly, preparing brazing filler metal sheets: cutting the Si-Zr high-temperature brazing filler metal prepared in the first step into sheets by adopting linear cutting equipment, polishing to remove oxide skin, then placing the sheets in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, and drying to obtain Si-Zr brazing filler metal sheets;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfthe/C composite material is used as a base material, and the Si-Zr brazing filler metal sheets prepared in the step two are fixed between two base materials to be assembled into a sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at a heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 10min to 30min under vacuum or protective atmosphere and at the temperature of 300 ℃, heating the sandwich structure to 1400 ℃ to 1480 ℃ at the heating rate of 5 ℃/min to 10 ℃/min under vacuum or protective atmosphere, preserving heat for 5min to 12min under vacuum or protective atmosphere and at the temperature of 1400 ℃ to 1480 ℃, cooling the sandwich structure to 300 ℃ at the cooling rate of 5 ℃/min under vacuum or protective atmosphere, and then furnace-cooling to room temperature under vacuum or protective atmosphere to finish CfAnd (3) a brazing process of the/C composite material.
2. The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal according to claim 1, wherein in the second step, the carbon fiber reinforced carbon-based composite material is ultrasonically cleaned in absolute ethyl alcohol for 8 min.
3. The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal according to claim 1, wherein the protective atmosphere in the third step is nitrogen or argon.
4. A method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal is characterized in that the brazing filler metal and C are formed by active elements Si and Zrfthe/C composite material undergoes an interfacial chemical reaction to form Cf/C/SiC/Si-ZrSi2/SiC/CfThe structure of the structure;
form Cf/C/SiC/Si-ZrSi2/SiC/CfThe structure of the/C is specifically carried out according to the following steps:
firstly, the method comprises the following steps: weighing Zr powder or ZrH2Taking the powder as a Zr source, weighing Si powder as the Si source, and then fully mixing and homogenizing the powder by adopting grinding and ball milling treatment to obtain Si-Zr high-temperature solder powder; the mass fraction of Zr element in the Si-Zr high-temperature solder powder is 22-32%;
II, secondly: pressing the Si-Zr high-temperature brazing filler metal powder prepared in the step one into a sheet Si-Zr brazing filler metal by using a tablet press, or uniformly mixing an organic binder and the Si-Zr high-temperature brazing filler metal powder prepared in the step one into slurry; the mass fraction of the organic binder in the slurry is 5-20%;
third, braze welding Cfthe/C composite material: two C to be weldedfPlacing the/C composite material in absolute ethyl alcohol for ultrasonic cleaning for 5-10 min, drying, and placing two C to be weldedfFixing the flaky Si-Zr brazing filler metal or the slurry prepared in the step two between two base metals to form a sandwich structure or coating the slurry prepared in the step two between the two base metals to form the sandwich structure; fixing the sandwich structure by a graphite mould, then placing the sandwich structure in a vacuum brazing furnace or an atmosphere furnace, heating the sandwich structure from room temperature to 300 ℃ at the heating rate of 5-10 ℃/min under the vacuum or protective atmosphere, preserving the heat for 10-30 min under the conditions of vacuum or protective atmosphere and the temperature of 300 ℃, and preserving the heat for 5-10 ℃/min under the vacuum or protective atmosphereRaising the temperature to 1400-1480 ℃ at a heating rate of 1400/min, preserving the heat for 10-12 min under the conditions of vacuum or protective atmosphere and 1400-1480 ℃, reducing the temperature to 300 ℃ at a cooling rate of 5 ℃/min under the vacuum or protective atmosphere, and then cooling to room temperature along with the furnace under the vacuum or protective atmosphere to finish CfAnd (3) a brazing process of the/C composite material.
5. The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal according to claim 4, wherein the organic binder in the second step is ethylene glycol or a 2% hydroxyethyl cellulose aqueous solution.
6. The method for brazing the carbon fiber reinforced carbon-based composite material by using the Si-Zr high-temperature brazing filler metal according to claim 4, wherein the protective atmosphere in the third step is nitrogen or argon.
CN201910392640.4A 2019-05-13 2019-05-13 Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal Active CN110026634B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910392640.4A CN110026634B (en) 2019-05-13 2019-05-13 Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910392640.4A CN110026634B (en) 2019-05-13 2019-05-13 Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal

Publications (2)

Publication Number Publication Date
CN110026634A CN110026634A (en) 2019-07-19
CN110026634B true CN110026634B (en) 2021-01-29

Family

ID=67241985

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910392640.4A Active CN110026634B (en) 2019-05-13 2019-05-13 Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal

Country Status (1)

Country Link
CN (1) CN110026634B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113478122B (en) * 2021-07-07 2023-01-31 临沂大学 Ultrahigh-temperature brazing filler metal for connecting C/SiC composite material and niobium alloy, preparation process thereof and vacuum active brazing method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831533B1 (en) * 2001-10-29 2004-07-30 Commissariat Energie Atomique PROCESS FOR METALLIZING AND / OR SELECTIVELY BRAZING BY A METALLIZATION COMPOSITION OF NON-WETTING OXIDE CERAMIC PIECES BY SAID COMPOSITION
FR2894499B1 (en) * 2005-12-08 2011-04-01 Snecma ASSEMBLY BETWEEN A METAL PIECE AND A PIECE OF CERAMIC MATERIAL BASED ON SIC AND / OR C
CN101786898B (en) * 2010-01-15 2011-12-28 北京科技大学 Method for connecting Cf/SiC composite material and Ni-based high-temperature alloy
CN103240544B (en) * 2013-05-23 2015-04-22 哈尔滨工业大学 High-temperature brazing filler metal for soldering C/C and C/SiC composite materials and preparation methods thereof
CN103341675B (en) * 2013-07-30 2015-05-20 哈尔滨工业大学 Method for braze welding of Cf/SiC composite material and metal Nb by using Ti-Co-Nb brazing filler metal
CN106112309B (en) * 2016-07-27 2018-02-23 江苏科技大学 A kind of brazing material for SiC ceramic soldering and the technique using material progress soldering
CN108213763A (en) * 2018-01-05 2018-06-29 四川大学 A kind of Zr bases solder and soldering processes connected for core SiC ceramic
CN108274086B (en) * 2018-01-24 2022-03-01 哈尔滨工业大学 Method for brazing carbon fiber reinforced carbon-based composite material at high temperature by two-step method

Also Published As

Publication number Publication date
CN110026634A (en) 2019-07-19

Similar Documents

Publication Publication Date Title
CN109877413B (en) Brazing material for SiC ceramic brazing and brazing method
JP6026285B2 (en) Method for joining parts made of SiC-based material by non-reactive brazing, brazing composition, and joint and assembly obtained by this method
CN102430829B (en) Method for raising brazing strength for ZrB2-based material
CN103223537B (en) Method for connecting high-strength graphite with copper alloy
CN108274086B (en) Method for brazing carbon fiber reinforced carbon-based composite material at high temperature by two-step method
CN105855745B (en) A kind of copper-based solder and its preparation method and application method
CN109047963B (en) CfComposite brazing connection method of/C composite material and nickel-based high-temperature alloy
CN105237026A (en) Ceramic/ceramic connection method for regulating and controlling middle solder layer through multi-physical-field coupling
CN110524082B (en) Method for quickly wetting carbon fibers in ceramic matrix composite by taking Fe as active element
CN101462890A (en) Connecting method for Cf/SiC composite material and titanium alloy
CN105149717A (en) Silicon-based ceramic surface metallization method
CN102489813A (en) Vacuum active brazing process of molybdenum-copper alloys and stainless steel
CN103341675B (en) Method for braze welding of Cf/SiC composite material and metal Nb by using Ti-Co-Nb brazing filler metal
CN106588064B (en) The solder and connection method of carbon/carbon compound material and nickel base superalloy
CN112296472B (en) Brazing method of graphite material
CN106041350A (en) Tungsten/copper or tungsten/steel connector and method for preparing same
CN103331499A (en) Method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals
CN110026634B (en) Method for brazing carbon fiber reinforced carbon-based composite material by using Si-Zr high-temperature brazing filler metal
CN102924109B (en) Cf/SiC ceramic matrix composite connecting method
CN113070543B (en) Method for brazing carbon material and nickel-based alloy by adopting Ag-Cr composite brazing filler metal
CN108555476B (en) Composite brazing filler metal for brazing quartz fiber reinforced composite ceramic and Invar alloy and preparation method and brazing method thereof
CN110480112A (en) Cf/ SiC ceramic matrix composite material reacts composite diffusion soldering connecting method with Ni based high-temperature alloy
CN106242606B (en) A method of utilizing Zr-Ni base solder brazing ZrB2-SiC composite ceramics
CN102825354A (en) Composite-diffusion brazing method of Cf/SiC ceramic based composite materials and titanium alloy
CN106216879B (en) A kind of Cu-TiH2- Ni+B composite solders and its preparation method and application

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