CN104559641B - Stealth material surface electromagnetism defect-restoration method therefor - Google Patents
Stealth material surface electromagnetism defect-restoration method therefor Download PDFInfo
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- CN104559641B CN104559641B CN201310497626.3A CN201310497626A CN104559641B CN 104559641 B CN104559641 B CN 104559641B CN 201310497626 A CN201310497626 A CN 201310497626A CN 104559641 B CN104559641 B CN 104559641B
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- electromagnetism
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Stealth material surface electromagnetism defect-restoration method therefor, belongs to technical field of electronic materials.The present invention comprises the steps：Defect gap is filled and led up using conducting resinl, then with electromagnetism defect repair material coat the defect.While the present invention realizes same scatter control performance, possesses good mechanical environment performance.And it is process is simple, workable, it is easy to promote.
Description
Technical field
The invention belongs to technical field of electronic materials, the implementation method of surface electromagnetism defect is more particularly to repaired.
Background technology
Since World War II, stealth technology has turned into the research emphasis of countries in the world.With the development of stealth technology, weapon dress
Standby stealth capabilities are significantly enhanced, and the strong scattering source such as its minute surface, angle body, cavity has obtained effective control.In order under
The surface such as the further lifting of generation weaponry stealth capabilities, gap, step electromagnetism defect is badly in need of as current stealth technology
The problem of solution.And due to the limitation of armament systems manufacturing process, its surface texture be inevitably present substantial amounts of gap,
The surface such as rivet, step electromagnetism defect, if not being controlled by, one or two gap or step are just enough to destroy the weapons such as aircraft dress
Standby Stealth Fighter, therefore the scatter control of the surface electromagnetism defect such as gap, step turns into one of the development of current stealth technology
Emphasis.
In stealthing design, orientation is taken to crack, the scheme such as rivet arrangement design dissipates to the surface such as gap, step electromagnetism
Penetrate control and play very positive effect.And under the limitation of the conditions such as aeroperformance, manufacturing process, above-mentioned configuration design is but received
Very big limitation is arrived, at this moment, it is a very effective means to take Radar Stealth Materials to load.Radar Stealth Materials user
Just flexibly, reliability is high, the excellent feature of electromagnetic scattering control performance, and critical role is accounted in stealth technology development.Early-stage Study
In show, for the scatter control of gap class electromagnetism defect in, when by the way of material joint filling, no matter electrically lossy material or
Magnetic loss consumption material, their loss is distributed substantially no attenuation to magnetic current can even be strengthened.For H- polarization, appropriate increase
Packing material real part of permittivity and magnetic conductivity real part can decay rapidly the distribution of its magnetic current, but real part of permittivity is further
Magnetic current distribution is substantially unchanged after increase, and the further increase of magnetic conductivity real part causes magnetic current distribution to increase on the contrary.E- is polarized,
Increase real part of permittivity is distributed substantially without influence on magnetic current, and the distribution of increase magnetic conductivity real part magnetic current also gradually increases but increases width
Degree is very small.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of stealth material surface electromagnetism defect-restoration method therefor, use
The present invention, has obvious inhibition to the back scattering that surface electromagnetism defect is produced.
The present invention solves the technical scheme that the technical problem uses, stealth material surface electromagnetism defect-restoration method therefor,
It is characterised in that it includes following step：Defect gap is filled and led up using conducting resinl, then with electromagnetism defect repair material coat the defect
Place.
The electromagnetism defect repair material is by micron order silver powder, epoxy resin, base polyurethane prepolymer for use as, mixed solvent and idol
Connection agent KH560 is constituted.The concrete content of each component can be set by performance requirement.
Used as an example, the electromagnetism defect repair material is by micron order silver powder, E03 trades mark epoxy resin, polyurethane
Performed polymer, butanone and cyclohexanone mixed solvent and coupling agent KH560 are constituted, and the ratio of each component is：Micron order silver powder 58~
62；E03 trade mark epoxy resin：19~22；Base polyurethane prepolymer for use as：30~34;KH560 silane couplers：0.4~0.8；Butanone with
Cyclohexanone mixed solvent：25~35.Above component unit is mass fraction（Gram）, wherein base polyurethane prepolymer for use as is with 2,4- toluene
Diisocyanate is the polyester prepolymer of monomer.
The present invention has following outstanding advantages：
1. electromagnetism defect repair material has good repairing effect to gap, the first-class surface electromagnetism defect of rivet, effectively drop
Low its back scattering；
2. compared with simply using aluminium foil/conducting resinl reparation, realized present invention employs electromagnetism defect repair material
While same scatter control performance, possesses good mechanical environment performance；
3. electromagnetism defect repair material has lightweight, and adhesive force is strong, the features such as scatter control bandwidth；
4. process is simple, workable, it is easy to promote.
Brief description of the drawings
Fig. 1 is surface electromagnetism defect carrier（Gap）, wherein manufactured head is not given in the diagram, and unit is in the least in figure
Rice.
Fig. 2 is that -10 ° of carrier places incidence wave face definition schematic diagram, and electromagnetic wave incident direction is defined as in face counterclockwise
Rotation.
Fig. 3 is incident corrugated definition schematic diagram when carrier is disposed vertically, and it is the normal plane rotation of the plane of incidence of Fig. 2 definition
10 ° obtain.Wherein, A is side view, and B is front view.
Fig. 4 is that 9.41GHz horizontal polarizations use electromagnetism defect repair material shields gap and both sides ailhead（But head ailhead
Do not process）With untreated preceding Electromagnetic Scattering Characteristics.
Fig. 5 is 9.41GHz horizontal polarization electromagnetism defect repair material shields gaps and all ailheads and untreated preceding electricity
Magnetic scattering characteristic.
Fig. 6 is carrier rivet distribution map（Totally 420 sunk screws are evenly distributed on edge to 4 rows, and screw is used in figure
Circular gap replaces）
Fig. 7 is the single screw schematic diagram in Fig. 6.
Specific embodiment
Specific embodiment one：
There are gap and edge and 43 rivets of header arrangement of width 1.0mm, deep 1.5mm, 9.41GHz levels in carrier center
The RCS average values of+5 ° to+25 ° of polarization are -27.37dBsm, the RCS average values of 0 ° to ± 15 ° of 9.41GHz vertical polarizations are -
27.47dBsm。
If with vertical bar aluminum foil shielded gap and both sides ailhead, head rivet is not shielded, then+5 ° of 9.41GHz horizontal polarizations to+
25 ° of RCS average values are -33.61dBsm, and the RCS average values of 0 ° to ± 15 ° of 9.41GHz vertical polarizations are -36.78dBsm.
If filling and leading up gap with conducting resinl, then gap and both sides rivet head surface, head riveting are applied with electromagnetism defect repair material
Ailhead is not applied, then the RCS average values of+5 ° to+25 ° of 9.41GHz horizontal polarizations are -31.06dBsm, 0 ° of 9.41GHz vertical polarizations
It is -37.77dBsm to ± 15 ° of RCS average values, as shown in Figure 4.
In X-band, the reparation with aluminium foil and with the method for electromagnetism defect repair material to the slot electromagnetic defect on carrier
RCS decrements performance is substantially suitable.But do not have mechanical environment performance using aluminium foil reparation, it is impossible to used in engineering, and used
It is high that electromagnetism defect repair material of the invention repairs its adhesive force, less than I grade；Impact resistance reaches 50Kg.cm；Pliability is good, reaches
3mm；Process is simple, it is easy to implement.
Specific embodiment two：
There are gap and edge and 43 rivets of header arrangement of width 1.0mm, deep 1.5mm, the vertical poles of 3GHz in carrier center
The RCS average values for changing 0 ° to ± 15 ° are -29.57dBsm.
If the manufactured head of both sides is stitched and stitched with vertical bar aluminum foil shielded, head rivet is not shielded, then 0 ° of 3GHz vertical polarizations are arrived
± 15 ° of RCS average values are -27.03dBsm.
If filling and leading up gap with conducting resinl, then gap and both sides rivet head surface, head riveting are applied with electromagnetism defect repair material
Ailhead is not applied, then the RCS average values of 0 ° to ± 15 ° of 3GHz vertical polarizations are -30.57dBsm.
Under S-band vertical polarization state, with conducting resinl and the method for electromagnetism defect repair material coating processing, to gap
The inhibition of back scattering is better than the method using vertical bar aluminum foil shielded.Meanwhile, electromagnetism defect repair material meets mechanical ring
Border performance, and aluminum foil shielded does not possess mechanical environment performance.
The electromagnetism defect repair material for being used is by micron order silver powder, E03 trades mark epoxy resin, base polyurethane prepolymer for use as, fourth
Ketone is constituted with cyclohexanone mixed solvent and coupling agent KH560, and the ratio of each component is：Micron order silver powder 58~62；The E03 trades mark
Epoxy resin：19~22；Base polyurethane prepolymer for use as：30~34;KH560 silane couplers：0.4~0.8；Butanone mixes with cyclohexanone
Solvent：25~35.Above component unit is mass fraction（Gram）, wherein base polyurethane prepolymer for use as is with 2,4- toluene di-isocyanate(TDI)s
It is the polyester prepolymer of monomer.
Specific embodiment three：
There are width 1.0mm, the gap of deep 1.5mm and edge 420 rivets of arrangement, gap sawtooth aluminum foil screen in carrier center
Cover.Electromagnetism fault location is gap（Gap including sunk screw）.
If with 420, aluminum foil shielded edge rivet, the RCS average values of 0 ° to ± 15 ° of 9.41GHz horizontal polarizations for-
The RCS average values of 0 ° to ± 15 ° of 41.45dBsm, 9.41GHz vertical polarization are -38.14dBsm.
If filling and leading up gap and 420, edge sunk screw with conducting resinl, then full plate is coated with electromagnetism defect repair material
（Except microwave absorbing coating）, then the RCS average values of 0 ° to ± 15 ° of 9.41GHz horizontal polarizations are -45.66dBsm, and 9.41GHz is vertical
The RCS average values of 0 ° to ± 15 ° of polarization are -36.47dBsm.
In X-band, with aluminium foil and with the method for electromagnetism defect repair material to the gap on carrier and the first-class surface of rivet
The reparation RCS decrements performance of electromagnetism defect is substantially suitable.But do not have mechanical environment performance using aluminium foil reparation, it is impossible in engineering
On use, and it is high to repair its adhesive force using electromagnetism defect repair material of the invention, less than I grade；Impact resistance reaches 50Kg.cm；
Pliability is good, up to 3mm；Process is simple, it is easy to implement.
Specific embodiment four：
There are width 1.0mm, the gap of deep 1.5mm and edge 420 rivets of arrangement, gap sawtooth aluminum foil screen in carrier center
Cover.Electromagnetism fault location is gap（Gap including sunk screw）.
If with 420, aluminum foil shielded edge rivet, the RCS average values of 0 ° to ± 15 ° of 3GHz vertical polarizations for-
29.65dBsm。
If filling and leading up gap and 420, edge sunk screw with conducting resinl, then full plate is coated with electromagnetism defect repair material
（Except microwave absorbing coating）, then the RCS average values of 0 ° to ± 15 ° of 3GHz vertical polarizations are -30.39dBsm.
Under S-band vertical polarization state, with conducting resinl and the method for electromagnetism defect repair material coating processing, to gap
Inhibition with manufactured head back scattering is slightly better than using the method for vertical bar aluminum foil shielded.Meanwhile, electromagnetism defect repair material
Meet mechanical environment performance, and aluminum foil shielded does not possess mechanical environment performance.
Claims (1)
1. stealth material surface electromagnetism defect-restoration method therefor, it is characterised in that comprise the steps：Defect is filled and led up using conducting resinl
Gap, then with electromagnetism defect repair material coat the defect, the electromagnetism defect repair material is by micron order silver powder, E03 boards
Number epoxy resin, base polyurethane prepolymer for use as, butanone and cyclohexanone mixed solvent and coupling agent KH560 are constituted, the ratio of each component
For：Micron order silver powder 58~62；E03 trade mark epoxy resin：19~22；Base polyurethane prepolymer for use as：30~34；KH560 is silane coupled
Agent：0.4~0.8；Butanone and cyclohexanone mixed solvent：25~35；Above component unit is mass fraction, wherein polyurethane prepolymer
Body is the polyester prepolymer with 2,4 toluene diisocyanate as monomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310497626.3A CN104559641B (en) | 2013-10-22 | 2013-10-22 | Stealth material surface electromagnetism defect-restoration method therefor |
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|---|---|---|---|
| CN201310497626.3A CN104559641B (en) | 2013-10-22 | 2013-10-22 | Stealth material surface electromagnetism defect-restoration method therefor |
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| CN104559641A CN104559641A (en) | 2015-04-29 |
| CN104559641B true CN104559641B (en) | 2017-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110845892A (en) * | 2019-11-12 | 2020-02-28 | 航天科工武汉磁电有限责任公司 | Fast-curing radar wave-absorbing putty and preparation method and application thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366034B (en) * | 2015-11-25 | 2018-07-13 | 中国航空工业集团公司沈阳飞机设计研究所 | A method of for blocking unmanned plane motion structure gap |
| CN106628174B (en) * | 2016-11-09 | 2023-08-15 | 北京航空航天大学 | Repair assembly for screw heads special for radar stealth combat aircraft |
| CN112606993B (en) * | 2020-12-24 | 2023-07-21 | 中国航空工业集团公司沈阳飞机设计研究所 | Flap edge scattering suppression device |
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| JP2008036847A (en) * | 2006-08-02 | 2008-02-21 | Furukawa Sky Kk | Precoated metal sheet excellent in damage resistance and conductivity |
| CN101275052A (en) * | 2008-05-14 | 2008-10-01 | 海洋化工研究院 | Corrosion-resistant electromagnetic screen coating and preparation thereof |
| CN103073981A (en) * | 2012-09-13 | 2013-05-01 | 电子科技大学 | High-temperature-resistant radar wave absorption coating and preparation method thereof |
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| CN104559641A (en) | 2015-04-29 |
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