CN104559641A - Method for repairing electromagnetic defect on surface of stealth material - Google Patents
Method for repairing electromagnetic defect on surface of stealth material Download PDFInfo
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- CN104559641A CN104559641A CN201310497626.3A CN201310497626A CN104559641A CN 104559641 A CN104559641 A CN 104559641A CN 201310497626 A CN201310497626 A CN 201310497626A CN 104559641 A CN104559641 A CN 104559641A
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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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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a method for repairing an electromagnetic defect on the surface of a stealth material, and belongs to the technical field of electronic materials. The method comprises the following steps: filling and leveling up a defect slit with conductive glue, and then coating the defected recess with an electromagnetic defect repairing material. According to the method, the same scattering control performance is realized, and high mechanical environment performance is achieved; furthermore, the technology is simple, the operability is high, and the popularization is facilitated.
Description
Technical field
The invention belongs to technical field of electronic materials, particularly repair the implementation method of surperficial electromagnetism defect.
Background technology
Since World War II, stealthy technique has become the research emphasis of countries in the world.Along with the development of stealthy technique, the stealth capabilities of weaponry is significantly enhanced, and the strong scattering sources such as its minute surface, angle body, cavity have obtained effective control.In order to the further lifting of weaponry stealth capabilities of future generation, the surperficial electromagnetism such as gap, step defect becomes current stealthy technique urgent problem.And due to the limitation of weapons system manufacturing process, inevitably there is the surperficial electromagnetism defects such as a large amount of gaps, rivet, step in its surface tissue, if do not controlled, article one or two, gap or step are just enough to the Stealth Fighter destroying the weaponrys such as aircraft, and therefore the scatter control of the surperficial electromagnetism such as gap, step defect becomes an emphasis of current stealthy technique development.
In stealthing design, take orientation to crack, the scatter control of scheme to the surperficial electromagnetism such as gap, step such as rivet arrangement design play very positive effect.And under the restriction of the condition such as aeroperformance, manufacturing process, above-mentioned configuration design but receives very large limitation, at this moment, taking Radar Stealth Materials to load is very effective means.Radar Stealth Materials easy to use and flexible, reliability are high, the excellent feature of electromagnetic scattering control performance, in stealthy technique development, account for critical role.Show in early-stage Study, in the scatter control for gap class electromagnetism defect, when adopting the mode of material joint filling, no matter electrical loss material or magnetic loss material, their loss does not have attenuation even can strengthen to magnetic current distribution substantially.H-is polarized, suitable increase packing material real part of permittivity and magnetic permeability real part all can decay rapidly its magnetic current distribution, but it is substantially unchanged that real part of permittivity increases the distribution of rear magnetic current further, the further increase of magnetic permeability real part causes magnetic current distribution to increase on the contrary.To E-polarization, increase real part of permittivity on magnetic current distribution substantially without impact, the distribution of increase magnetic permeability real part magnetic current also increases gradually but the amplitude of increase is very little.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of stealth material surface electromagnetism defect-restoration method therefor, adopt the present invention, the backscattering that effects on surface electromagnetism defect produces has obvious inhibition.
The technical scheme that the present invention solve the technical problem employing is, stealth material surface electromagnetism defect-restoration method therefor, is characterized in that, comprises the steps: to adopt conductive resin to fill and lead up defect gap, then uses electromagnetism defect repair coated materials fault location.
Described electromagnetism defect repair material is made up of micron order silver powder, epoxy resin, base polyurethane prepolymer for use as, mixed solvent and coupling agent KH560.The concrete content of each component can do as one likes energy requirements set.
As an example, described electromagnetism defect repair material is made up of micron order silver powder, E03 trade mark epoxy resin, base polyurethane prepolymer for use as, butanone and pimelinketone mixed solvent and coupling agent KH560, 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 coupling agent: 0.4 ~ 0.8; Butanone and pimelinketone mixed solvent: 25 ~ 35.Above component unit is mass fraction (gram), and wherein base polyurethane prepolymer for use as take 2,4 toluene diisocyanate as the polyester prepolymer of monomer.
The present invention has following outstanding advantages:
1. electromagnetism defect repair material has good repairing effect to gap, rivet first-class surface electrical magnetic defect, effectively reduces its backscattering;
2. with simply adopt compared with aluminium foil/conductive resin reparation, present invention employs electromagnetism defect repair material while realizing same scatter control performance, possess good mechanical environment performance;
3. the features such as electromagnetism defect repair material has lightweight, strong adhesion, scatter control bandwidth;
4. technique is simple, workable, is easy to promote.
Accompanying drawing explanation
Fig. 1 is surperficial electromagnetism defect carrier (gap), and wherein rivet head does not provide in the diagram, Tu Zhong unit millimeter.
Fig. 2 is that-10 °, carrier is placed into ejected wave face definition schematic diagram, and electromagnetic wave incident direction is defined as and is rotated counterclockwise in face.
Fig. 3 is carrier incident corrugated definition schematic diagram when vertically placing, and normal plane of its plane of incidence defined for Fig. 2 rotates 10 ° and obtains.Wherein, A is side-view, and B is front view.
Fig. 4 is that 9.41GHz horizontal polarization adopts electromagnetism defect repair material shields gap and both sides ailhead (but head ailhead does not process) and untreated front Electromagnetic Scattering Characteristics.
Fig. 5 is 9.41GHz horizontal polarization electromagnetism defect repair material shields gap and all ailheads and untreated front Electromagnetic Scattering Characteristics.
Fig. 6 is carrier rivet distribution plan (4 rows totally 420 sunk screws are evenly distributed on edge, and screw adopts circular gap to replace in the drawings)
Fig. 7 is the single screw schematic diagram in Fig. 6.
Embodiment
Embodiment one:
There is wide 1.0mm in carrier center, the gap of dark 1.5mm and edge and header arrangement 43 rivets, and the RCS mean value of 9.41GHz horizontal polarization+5 ° to+25 ° is the RCS mean value of-27.37dBsm, 9.41GHz vertical polarization 0 ° to ± 15 ° is-27.47dBsm.
If with vertical bar aluminum foil shielded gap and both sides ailhead, head rivet does not shield, then the RCS mean value of 9.41GHz horizontal polarization+5 ° to+25 ° is the RCS mean value of-33.61dBsm, 9.41GHz vertical polarization 0 ° to ± 15 ° is-36.78dBsm.
If fill and lead up gap with conductive resin, gap and both sides rivet head surface is coated with again with electromagnetism defect repair material, head rivet head is not coated with, then the RCS mean value of 9.41GHz horizontal polarization+5 ° to+25 ° is-31.06dBsm, the RCS mean value of 9.41GHz vertical polarization 0 ° to ± 15 ° is-37.77dBsm, as shown in Figure 4.
At X-band, with aluminium foil with to reduce performance with the reparation RCS of method to the slot electromagnetic defect on carrier of electromagnetism defect repair material substantially suitable.But adopt aluminium foil reparation not have mechanical environment performance, can not use in engineering, and it is high to adopt electromagnetism defect repair material of the present invention to repair its sticking power, is less than I grade; Shock-resistantly reach 50Kg.cm; Snappiness is good, reaches 3mm; Technique is simple, and it is convenient to implement.
Embodiment two:
There is wide 1.0mm in carrier center, the gap of dark 1.5mm and edge and header arrangement 43 rivets, and the RCS mean value of 3GHz vertical polarization 0 ° to ± 15 ° is-29.57dBsm.
If with vertical bar aluminum foil shielded seam and the rivet head stitching both sides, head rivet does not shield, then the RCS mean value of 3GHz vertical polarization 0 ° to ± 15 ° is-27.03dBsm.
If fill and lead up gap with conductive resin, then be coated with gap and both sides rivet head surface with electromagnetism defect repair material, head rivet head is not coated with, then the RCS mean value of 3GHz vertical polarization 0 ° to ± 15 ° is-30.57dBsm.
Under S-band vertical polarization state, by the method for conductive resin and the process of electromagnetism defect repair coated materials, the method adopting vertical bar aluminum foil shielded is better than to the backward scattered inhibition in gap.Meanwhile, electromagnetism defect repair material meets mechanical environment use properties, and aluminum foil shielded does not possess mechanical environment use properties.
The electromagnetism defect repair material adopted is made up of micron order silver powder, E03 trade mark epoxy resin, base polyurethane prepolymer for use as, butanone and pimelinketone mixed solvent and coupling agent KH560, 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 coupling agent: 0.4 ~ 0.8; Butanone and pimelinketone mixed solvent: 25 ~ 35.Above component unit is mass fraction (gram), and wherein base polyurethane prepolymer for use as take 2,4 toluene diisocyanate as the polyester prepolymer of monomer.
Embodiment three:
There is wide 1.0mm in carrier center, the gap of dark 1.5mm and edge placement 420 rivets, gap sawtooth aluminum foil shielded.Electromagnetism fault location is gap (comprising the gap of sunk screw).
If with 420, aluminum foil shielded edge rivet, then the RCS mean value of 9.41GHz horizontal polarization 0 ° to ± 15 ° is the RCS mean value of-41.45dBsm, 9.41GHz vertical polarization 0 ° to ± 15 ° is-38.14dBsm.
If fill and lead up gap and 420, edge sunk screw with conductive resin, then the full plate of electromagnetism defect repair coated materials (except microwave absorbing coating) is used, then the RCS mean value of 9.41GHz horizontal polarization 0 ° to ± 15 ° is the RCS mean value of-45.66dBsm, 9.41GHz vertical polarization 0 ° to ± 15 ° is-36.47dBsm.
At X-band, with aluminium foil with to reduce performance with the method for the electromagnetism defect repair material reparation RCS to the gap on carrier and rivet first-class surface electrical magnetic defect substantially suitable.But adopt aluminium foil reparation not have mechanical environment performance, can not use in engineering, and it is high to adopt electromagnetism defect repair material of the present invention to repair its sticking power, is less than I grade; Shock-resistantly reach 50Kg.cm; Snappiness is good, reaches 3mm; Technique is simple, and it is convenient to implement.
Embodiment four:
There is wide 1.0mm in carrier center, the gap of dark 1.5mm and edge placement 420 rivets, gap sawtooth aluminum foil shielded.Electromagnetism fault location is gap (comprising the gap of sunk screw).
If with 420, aluminum foil shielded edge rivet, then the RCS mean value of 3GHz vertical polarization 0 ° to ± 15 ° is-29.65dBsm.
If fill and lead up gap and 420, edge sunk screw with conductive resin, then use the full plate of electromagnetism defect repair coated materials (except microwave absorbing coating), then the RCS mean value of 3GHz vertical polarization 0 ° to ± 15 ° is-30.39dBsm.
Under S-band vertical polarization state, by the method for conductive resin and the process of electromagnetism defect repair coated materials, the method adopting vertical bar aluminum foil shielded is slightly better than to gap and the backward scattered inhibition of rivet head.Meanwhile, electromagnetism defect repair material meets mechanical environment use properties, and aluminum foil shielded does not possess mechanical environment use properties.
Claims (3)
1. stealth material surface electromagnetism defect-restoration method therefor, is characterized in that, comprises the steps: to adopt conductive resin to fill and lead up defect gap, then uses electromagnetism defect repair coated materials fault location.
2. stealth material surface as claimed in claim 1 electromagnetism defect-restoration method therefor, it is characterized in that, described electromagnetism defect repair material is made up of micron order silver powder, epoxy resin, base polyurethane prepolymer for use as, mixed solvent and coupling agent KH560.
3. stealth material surface as claimed in claim 1 electromagnetism defect-restoration method therefor, it is characterized in that, described electromagnetism defect repair material is made up of micron order silver powder, E03 trade mark epoxy resin, base polyurethane prepolymer for use as, butanone and pimelinketone mixed solvent and coupling agent KH560, 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 coupling agent: 0.4 ~ 0.8; Butanone and pimelinketone mixed solvent: 25 ~ 35; Above component unit is mass fraction, and wherein base polyurethane prepolymer for use as take 2,4 toluene diisocyanate as the polyester prepolymer of monomer.
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| 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 true CN104559641A (en) | 2015-04-29 |
| CN104559641B CN104559641B (en) | 2017-06-09 |
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Cited By (3)
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|---|---|---|---|---|
| CN105366034A (en) * | 2015-11-25 | 2016-03-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for shielding gap of unmanned aerial vehicle motion structure |
| CN106628174A (en) * | 2016-11-09 | 2017-05-10 | 北京航空航天大学 | Repair assembly for screw head special for radar stealthy combat aircraft |
| CN112606993A (en) * | 2020-12-24 | 2021-04-06 | 中国航空工业集团公司沈阳飞机设计研究所 | Flap edge scattering suppression device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366034A (en) * | 2015-11-25 | 2016-03-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for shielding gap of unmanned aerial vehicle motion structure |
| 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 |
| CN106628174A (en) * | 2016-11-09 | 2017-05-10 | 北京航空航天大学 | Repair assembly for screw head special for radar stealthy combat aircraft |
| 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 |
| CN112606993A (en) * | 2020-12-24 | 2021-04-06 | 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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