CN110240494A - A kind of fiber reinforcement Cf/SiC composite plate weld connector - Google Patents
A kind of fiber reinforcement Cf/SiC composite plate weld connector Download PDFInfo
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- CN110240494A CN110240494A CN201910575197.4A CN201910575197A CN110240494A CN 110240494 A CN110240494 A CN 110240494A CN 201910575197 A CN201910575197 A CN 201910575197A CN 110240494 A CN110240494 A CN 110240494A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/88—Metals
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
A kind of fiber reinforcement Cf/SiC composite plate weld connector, belongs to composite material and dissimilar metal connection area.500-1500 μm of phase of joint surface fibre reinforced of the present invention, which is first placed in Cf/SiC composite material in NaOH solution after heating corrosion with dried for standby after ultrasonic cleaning；Surface sweeping speed, surface sweeping spacing and laser power are arranged in software material is processed to obtain finished product.This welding point uses a kind of structure of fibre reinforced, there are fibre reinforced phases between Cf/SiC composite material and the welding point of metal, joint fibre reinforced is mutually a part of the fiber establishment body of Cf/SiC composite inner, joint fibre reinforced phase and brazing metal soak, fibre reinforced is connected composite material and brazing metal, by fiber reinforced effect and effect is extracted, achievees the purpose that Welded Joints toughening.
Description
Technical field
The present invention relates to a kind of fiber reinforcement Cf/SiC composite plate weld connector, belongs to composite material and dissimilar metal connects
Connect field.
Background technique
In terms of application angle, currently, each big country, the world attaches great importance to the development of the advanced weapons of system such as anti-ballistic, the U.S. will
The development and configuration of missile defense systems are used as a great state basic policy, and China has also carried out grinding in advance for advanced kinetic energy interceptor
Study carefully.Thrust chamber (such as missile propulsive plant thrust chamber, Anti-ballistic missile attitude control thrust chamber) as dynamical system uses lightweight, height
Specific strength, C/SiC resistant to high temperature (i.e. carbon fibre reinforced silicon carbide) composite material.More than ten years grinds since " 95 " are passed through in China
System breaches the establishment molding of C/SiC composite material, densifies the key technologies such as anti-oxidant, and technology reaches its maturity, and has entered work
The journey development stage.Currently, the composite thrust chamber body portion C/SiC and ejector filler head titanium alloy are using bolt connection type living
It is attached, to solve the problems, such as engines ground test run.Since the sealant that connection living uses is graphite material, when with placing
Between extension, graphite institute compression chord can gradually discharge, and there are gas leakage hidden danger, reliability and safety are poor.In addition, connection living
Since Work fixture device is heavier, structure is complicated, counteracts the advantage of C/SiC composite material light weight, or even also improves whole
The weight of a thrust-chamber assembly.China so far still it is not yet in effect solve C/SiC composite thrust room connectivity problem, become the hair
The maximum technology barrier of motivation engineering application
In terms of material angle, Cf/ SiC ceramic matrix composite material combines the plurality of advantages of carbon fiber and silicon carbide ceramics, not only has
There are a series of excellent property such as single-phase SiC ceramic high abrasion, resistant to chemical etching, high-termal conductivity, high temperature resistant and low linear expansion coefficient
Can, and since the implantation of carbon fiber enhances the toughness of SiC ceramic matrix, SiC ceramic is effectively overcomed to crackle and heat
The sensibility of shake.In many applications, it is often necessary to be attached Cf/SiC composite material with metal material, it is mutual to reach advantage
The purpose of benefit, but the methods of conventional active metal brazing, diffusion welding, Transient liquid phase connection there are bonding strength compared with
Low, interfacial reaction is difficult to control, interface forms the urgent problems such as brittlement phase, interfacial stress are big, thermal expansion mismatches.
The above obtained welded joint structure of connection method, is two-phase face contact, and there is no fiber reinforced therefore disconnected
Splitting is brittle fracture mechanism, yielding stage is not present in stress-strain diagram, bring consequence is often in the application for this
It is catastrophic, without any strain tendency, thoroughly fracture suddenly.
Summary of the invention
In order to overcome the above structure bring defect, this welding point uses a kind of structure of fibre reinforced, Cf/
There are fibre reinforced phase between SiC ceramic matrix composite material and the welding point of metal, joint fibre reinforced is mutually Cf/SiC multiple
A part of fiber establishment body inside condensation material, joint fibre reinforced phase and brazing metal soak, fibre reinforced phase
Composite material and brazing metal are connected, by fiber reinforced effect and effect is extracted, achievees the purpose that Welded Joints toughening.
500-1500 μm of phase thickness of surface fibre reinforced at welding point of the invention, wherein metal sputtering is in Cf table
Face, Cf fiber are interspersed between metal phase and Cf phase two-phase, solve technical problem the technical solution adopted is that passing through following steps
It realizes:
S1. Cf/SiC composite material is placed in the NaOH solution that concentration is 1-10mol/L；
S2. solution is heated to 10-100 DEG C, reaction corrosion 1-72h；
S3. sample, ultrasonic cleaning, dried for standby are taken out；
S4. metallic region figure is edited in optical fiber laser control software；
S5. setting surface sweeping speed is 1-1000mm/s in software, surface sweeping spacing is 0.01-1mm, laser power 10-
100%；
S6. the Cf/SiC composite sample that will be metallized is placed on laser processing platform, place thereon with a thickness of
The metal foil of 0.01-0.5mm；
S7. it adjusts position focal length and is laser machined, metal foil steam raising under the effect of the laser is splashed to
Cf/SiC composite material surface, the Cf/SiC composite material to be metallized；
S8. sample is polished, drying obtains finished product.
The utility model has the advantages that
Compared with existing welding structure, the advantage of this structure is: this welding point uses a kind of fibre reinforced
Structure, CfThere are fibre reinforced phase, joint fibre reinforced phases between/SiC ceramic matrix composite material and the welding point of metal
It is CfA part of fiber establishment body inside/SiC ceramic matrix composite material, joint fibre reinforced phase and brazing metal soak, carbon
Fiber reinforcement is connected composite material and brazing metal, by fiber reinforced effect and extracts effect, reaches Welded Joints increasing
Tough purpose.
Detailed description of the invention
Fig. 1 is a kind of fiber reinforcement Cf/SiC composite plate weld joint structure schematic diagram of the present invention.
Surface product electron microscope at welding point after Fig. 2 corrodes for embodiment 1.
As shown in Figure 1, the welding metal of 1. joints, the fibre reinforced phase of 2. joints, 3.Cf/SiC composite material.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the examples below, implements below
Example for explaining only the invention, is not intended to limit the scope of the present invention..
Embodiment 1
S1. Cf/SiC composite material is placed in the NaOH solution that concentration is 3mol/L；
S2. solution is heated to 50 DEG C, reaction corrosion 10h；
S3. sample, ultrasonic cleaning, dried for standby are taken out；
S4. metallic region figure is edited in optical fiber laser control software；
S5. setting surface sweeping speed is 1-1000mm/s in software, surface sweeping spacing is 0.01-1mm, laser power 10-
100%；
S6. the Cf/SiC composite sample that will be metallized is placed on laser processing platform, place thereon with a thickness of
The metal foil of 0.01-0.5mm；
S7. it adjusts position focal length and is laser machined, metal foil steam raising under the effect of the laser is splashed to
Cf/SiC composite material surface, the Cf/SiC composite material to be metallized；
S8. sample is polished, drying obtains finished product.
500 μm of surface fibre reinforced phase at welding point after corrosion, as shown in Figure 1, joint fibre reinforced is mutually
A part of integral weaving body, carbon fiber metallized rear and solder, the broken curve for corroding exposing are ductile rupture, are had
Yielding stage.
Embodiment 2
S1. Cf/SiC composite material is placed in the NaOH solution that concentration is 5mol/L；
S2. solution is heated to 60 DEG C, reaction corrosion 20h；
S3. sample, ultrasonic cleaning, dried for standby are taken out；
S4. metallic region figure is edited in optical fiber laser control software；
S5. setting surface sweeping speed is 1-1000mm/s in software, surface sweeping spacing is 0.01-1mm, laser power 10-
100%；
S6. the Cf/SiC composite sample that will be metallized is placed on laser processing platform, place thereon with a thickness of
The metal foil of 0.01-0.5mm；
S7. it adjusts position focal length and is laser machined, metal foil steam raising under the effect of the laser is splashed to
Cf/SiC composite material surface, the Cf/SiC composite material to be metallized；
S8. sample is polished, drying obtains finished product.
1000 μm of surface fibre reinforced phase at welding point, joint fibre reinforced are mutually integral weaving bodies after corrosion
A part, corrode exposing carbon fiber it is metallized after and solder, broken curve be ductile rupture, have yielding stage.
Embodiment 3
S1. Cf/SiC composite material is placed in the NaOH solution that concentration is 7mol/L；
S2. solution is heated to 70 DEG C, reaction corrosion 30h；
S3. sample, ultrasonic cleaning, dried for standby are taken out；
S4. metallic region figure is edited in optical fiber laser control software；
S5. setting surface sweeping speed is 1-1000mm/s in software, surface sweeping spacing is 0.01-1mm, laser power 10-
100%；
S6. the Cf/SiC composite sample that will be metallized is placed on laser processing platform, place thereon with a thickness of
The metal foil of 0.01-0.5mm；
S7. it adjusts position focal length and is laser machined, metal foil steam raising under the effect of the laser is splashed to
Cf/SiC composite material surface, the Cf/SiC composite material to be metallized；
S8. sample is polished, drying obtains finished product.
1500 μm of surface fibre reinforced phase at welding point, joint fibre reinforced are mutually integral weaving bodies after corrosion
A part, corrode exposing carbon fiber it is metallized after and solder, broken curve be ductile rupture, have yielding stage.
Above-described embodiment is only intended to citing and explanation of the invention, and is not intended to limit the invention to described
In scope of embodiments.Furthermore it will be appreciated by persons skilled in the art that the present invention is not limited to the above embodiment, according to this hair
Bright introduction can also make more kinds of variants and modifications, these variants and modifications all fall within present invention model claimed
In enclosing.
Claims (4)
1. a kind of fiber reinforcement Cf/SiC composite plate weld connector, which is characterized in that surface carbon fiber increases at the welding point
Strong 500-1500 μm of phase thickness, wherein on the surface Cf, Cf fiber is interspersed between metal phase and Cf phase two-phase metal sputtering, welding
Connector is prepared by following steps:
S1. in NaOH solution Cf/SiC composite material being placed in；
S2. solution is heated and is corroded；
S3. sample, ultrasonic cleaning, dried for standby are taken out；
S4. metallic region figure is edited in optical fiber laser control software；
S5. surface sweeping speed, surface sweeping spacing and laser power are arranged in software is；
S6. the Cf/SiC composite sample that will be metallized is placed on laser processing platform, is placed thereon with a thickness of 0.01-
The metal foil of 0.5mm；
S7. it adjusts position focal length and is laser machined, the Cf/SiC composite material to be metallized；
S8. sample is polished, drying is stand-by.
2. a kind of fiber reinforcement Cf/SiC composite plate weld connector according to claim 1 is it is characterized in that, step S1
In NaOH solution concentration be 1-10mol/L.
3. a kind of fiber reinforcement Cf/SiC composite plate weld connector according to claim 1, which is characterized in that step S2
Middle heating temperature is 10-100 DEG C, etching time 1-72h.
4. a kind of fiber reinforcement Cf/SiC composite plate weld connector according to claim 1, which is characterized in that step S5
Middle surface sweeping speed is 1-1000mm/s, surface sweeping spacing is 0.01-1mm, laser power 10-100%.
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| CN201910575197.4A CN110240494A (en) | 2019-06-28 | 2019-06-28 | A kind of fiber reinforcement Cf/SiC composite plate weld connector |
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| CN201910575197.4A CN110240494A (en) | 2019-06-28 | 2019-06-28 | A kind of fiber reinforcement Cf/SiC composite plate weld connector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666389A (en) * | 2019-10-18 | 2020-01-10 | 郑州机械研究所有限公司 | Fiber-toughened tungsten carbide welding rod |
| CN114031425A (en) * | 2021-12-16 | 2022-02-11 | 大连大学 | Metallized ceramic |
| CN114230374A (en) * | 2021-12-16 | 2022-03-25 | 大连大学 | Silicon nitride surface metallization method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495979A (en) * | 1994-06-01 | 1996-03-05 | Surmet Corporation | Metal-bonded, carbon fiber-reinforced composites |
| WO2001068751A1 (en) * | 2000-03-16 | 2001-09-20 | Ppg Industries Ohio, Inc. | Impregnated glass fiber strands and products including the same |
| US6521331B1 (en) * | 1999-03-05 | 2003-02-18 | Mtu Aero Engines Gmbh | Layer structure including metallic cover layer and fiber-reinforced composite substrate, and a method of making the same |
| CN1528714A (en) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | Carbon, ceramic-nonmetallic material and metal material connection method |
| CN1234902C (en) * | 2002-09-12 | 2006-01-04 | 厦门大学 | Eletrochemical process for producing fibre strengthened metal base composite material |
| US20060065970A1 (en) * | 2004-09-29 | 2006-03-30 | Fujitsu Limited | Radiating fin and method for manufacturing the same |
| CN102924109A (en) * | 2012-10-18 | 2013-02-13 | 北京科技大学 | Cf/SiC ceramic matrix composite connecting method |
| CN105220087A (en) * | 2015-07-20 | 2016-01-06 | 西安科技大学 | A kind of high tough Ti (C, N) based ceramic metal matrix material and preparation method thereof |
| CN105364246A (en) * | 2015-12-21 | 2016-03-02 | 哈尔滨工业大学 | Method for performing auxiliary brazing on surface-corrosion SiO2 ceramic matrix composite |
| CN106653630A (en) * | 2017-01-22 | 2017-05-10 | 大连大学 | Silicon surface metallization method |
| CN108863425A (en) * | 2018-07-30 | 2018-11-23 | 西北工业大学 | The connection method of silicon carbide ceramics and its composite material |
| CN109518277A (en) * | 2018-11-05 | 2019-03-26 | 中国科学院半导体研究所 | The method that zonal corrosion is carried out to silicon carbide using melting lye |
-
2019
- 2019-06-28 CN CN201910575197.4A patent/CN110240494A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495979A (en) * | 1994-06-01 | 1996-03-05 | Surmet Corporation | Metal-bonded, carbon fiber-reinforced composites |
| US6521331B1 (en) * | 1999-03-05 | 2003-02-18 | Mtu Aero Engines Gmbh | Layer structure including metallic cover layer and fiber-reinforced composite substrate, and a method of making the same |
| WO2001068751A1 (en) * | 2000-03-16 | 2001-09-20 | Ppg Industries Ohio, Inc. | Impregnated glass fiber strands and products including the same |
| CN1234902C (en) * | 2002-09-12 | 2006-01-04 | 厦门大学 | Eletrochemical process for producing fibre strengthened metal base composite material |
| CN1528714A (en) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | Carbon, ceramic-nonmetallic material and metal material connection method |
| US20060065970A1 (en) * | 2004-09-29 | 2006-03-30 | Fujitsu Limited | Radiating fin and method for manufacturing the same |
| CN102924109A (en) * | 2012-10-18 | 2013-02-13 | 北京科技大学 | Cf/SiC ceramic matrix composite connecting method |
| CN105220087A (en) * | 2015-07-20 | 2016-01-06 | 西安科技大学 | A kind of high tough Ti (C, N) based ceramic metal matrix material and preparation method thereof |
| CN105364246A (en) * | 2015-12-21 | 2016-03-02 | 哈尔滨工业大学 | Method for performing auxiliary brazing on surface-corrosion SiO2 ceramic matrix composite |
| CN106653630A (en) * | 2017-01-22 | 2017-05-10 | 大连大学 | Silicon surface metallization method |
| CN108863425A (en) * | 2018-07-30 | 2018-11-23 | 西北工业大学 | The connection method of silicon carbide ceramics and its composite material |
| CN109518277A (en) * | 2018-11-05 | 2019-03-26 | 中国科学院半导体研究所 | The method that zonal corrosion is carried out to silicon carbide using melting lye |
Non-Patent Citations (5)
| Title |
|---|
| FAN DY 等: "Active brazing of carbon fiber reinforced SiC composite and 304 stainless steel with Ti-Zr-Be", 《MATERIALS SCIENCE AND ENGINEERING》 * |
| 李海刚等: "激光毛化对Cf/SiC与TC4钎焊接头组织及性能的影响", 《宇航材料工艺》 * |
| 沈孝芹等: "陶瓷基复合材料/金属焊接研究现状", 《焊接技术》 * |
| 董振华: "C/SiC复合材料与TC4钎焊工艺研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 钱苗根主编: "《现代表面工程》", 30 September 2012, 上海交通大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666389A (en) * | 2019-10-18 | 2020-01-10 | 郑州机械研究所有限公司 | Fiber-toughened tungsten carbide welding rod |
| CN110666389B (en) * | 2019-10-18 | 2021-07-02 | 郑州机械研究所有限公司 | Fiber-toughened tungsten carbide welding rod |
| CN114031425A (en) * | 2021-12-16 | 2022-02-11 | 大连大学 | Metallized ceramic |
| CN114230374A (en) * | 2021-12-16 | 2022-03-25 | 大连大学 | Silicon nitride surface metallization method |
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