CN103770431B - The preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers - Google Patents
The preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers Download PDFInfo
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- CN103770431B CN103770431B CN201410007252.7A CN201410007252A CN103770431B CN 103770431 B CN103770431 B CN 103770431B CN 201410007252 A CN201410007252 A CN 201410007252A CN 103770431 B CN103770431 B CN 103770431B
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Abstract
The invention discloses the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers, have following steps: 1, surface treatment is carried out to sheet metal, to strengthen the bond strength with metallic plate; 2, the Fiber prepreg cut is folded against right angle gauge, keep machine direction consistent; Be that radioactivity flatiron Fiber prepreg is with bubble residual between extruding layer from centre to edge with the flatirons of 90 ~ 100 DEG C; 3, use powder method or solwution method to add appropriate nanometer to the metal sheet surface or fibreboard surface that need bonding and strengthen additive; Then metallic plate and fiberboard alternative stacked, note in lamination making machine direction keep vertical with the pressor unit direction of sheet metal; 4, by the fibre metal laminate of step 3 gained, put solidification in hot press or autoclave into and obtain finished product.Its advantage is: in the manufacturing process of fibre metal laminate, improves the interlaminar strength between fibrage and metal level, improves fibrage and metal interlevel fracture toughness.
Description
Technical field
The present invention relates to a kind of preparation method of composite, be specifically related to the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers.
Background technology
Aluminum alloy materials has compared with low-density and higher intensity and shock resistance, and it is also comparatively cheap to have good machinability cost.Therefore just aerospace field is widely used in since earlier 1930s.But aluminum alloy materials has some limitation such as lower fatigue life and corrosion resistance limits its further using value.And the glass fibre of twentieth century four the fifties invention and carbon fibre composite have very high specific strength and specific stiffness, and there is good fatigue properties and corrosion resistance, but outside this laminated composite material face transverse strength and shock resistance poor, and Coating combination face easily produces delamination.In order to overcome some shortcomings of aluminum alloy materials and fibrous composite existence simultaneously, in later 1970s, be have developed the fibre metal laminate material of metal material and fiber composite by TU Delft Polytechnics.This material combines the advantage of metal and fibrous composite, and overcomes its most shortcoming, is a kind of structural material having huge applications prospect in high-tech areas such as Aero-Space, military affairs, automobiles.Its most is representational be exactly the material of fiberglass reinforced plastics and aluminium alloy compound namely: GFRP/Al laminate (commercial code GLARE), has been used on the fuselage of Air Passenger A380 at present.Although fibre metal laminate has the performance of a series of excellence, its metal level and fiber composite layer can cause boundary strength weak problem because foreign material is combined.
Chinese patent literature CN102516569A discloses a kind of preparation method of carbon nanotube non-woven fabric interlayer modified fiber reinforced composite materials, direct for carbon nano-tube non-woven fabrics intercalation is entered into the interlayer resin-rich area territory of fiber reinforced thermosetting resin based composites by it, utilizes autoclave forming process or liquid condition shaping technique to prepare interlayer modified composite according to the original curing process of matrix resin.Thus improve composite interlayer strong-malleableize performance, obtain HI high impact damage resistence and high damage tolerance.At present, the method that also open directly use nanometer adding layers is interlayer modified carrys out the technology of the interlaminar strength of fortifying fibre metal laminate.
Summary of the invention
For the defect that fracture toughness between the fibrage of fibre metal laminate and metal level is lower, technical problem to be solved by this invention is just to provide the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers, it can improve the interlaminar strength between fibrage and metal level, improves interlaminar fracture toughness.
Method of the present invention, comprises the following steps:
1, surface treatment is carried out to metallic plate, to strengthen the bond strength with metallic plate;
2, the Fiber prepreg cut is folded against right angle gauge, keep machine direction consistent; Be that radioactivity flatiron Fiber prepreg is with bubble residual between extruding layer from centre to edge with the flatirons of 90 ~ 100 DEG C;
3, use powder method or solwution method to add appropriate nanometer to the metal sheet surface and fibreboard surface that need bonding and strengthen additive; Then metallic plate and fiberboard alternative stacked, note in lamination making machine direction keep vertical with the material pressor unit direction of metallic plate;
4, by the fibre metal laminate of step 3 gained, put solidification in hot press or autoclave into and obtain finished product.
In described step 1, metal sheet surface is treated to mechanical grinding, electrochemical corrosion, acid treatment, laser ablation or plasma spraying, and described metallic plate has aluminium alloy plate, corrosion resistant plate or titanium alloy sheet.
In described step 2, the base material of Fiber prepreg is glass fibre, carbon fiber, cotton fibriia or bamboo fibre.
In described step 3, it is single or multiple lift CNT, VGCF, acidifying VGCF, carbon black, Graphene or graphene oxide that nanometer strengthens additive.
In described step 3, described powder method refers to Powdered nanometer additive, adopts the sieve of suitable sizing grid, and quantitative nanometer powder Direct Uniform is sprinkled upon on the fiberboard or metal plate that will bond.
In described step 3, described solwution method refers to the nanometer additive to Powdered, graininess or sheet, adopt ultrasonic wave to stir and nanometer additive is dispersed in organic solution as in acetone or dimethyl formamide (DMF) solution, then add a certain amount of epoxy resin to stir, in order to ensure good dispersiveness, machinery can be repeatedly used stir with ultrasonic wave, afterwards heating acetone or DMF are vapored away, finally be left nanometer reinforced epoxy uniform application on the fiberboard that will bond or metallic plate.
In step 4, the described gradient heating that is cured as solidifies, and be first heated to certain temperature from room temperature and keep certain hour to make the softening flowing of resin, to reduce bubble, be then heated to more than solidification temperature, constant temperature certain hour solidifies rear cooling naturally completely.
The present invention is in the manufacturing process of fibre metal laminate, by carrying out surface treatment to metallic plate, and add appropriate nanometer additive and carry out interlayer modified to the interlayer of fibrage and metallic plate, thus improve the interlaminar strength of fibre metal laminate, improve its interlaminar fracture toughness.
Owing to have employed technique scheme, the present invention has following advantage: in the manufacturing process of fibre metal laminate, improves the interlaminar strength between fibrage and metal level, improves fibrage and metal interlevel fracture toughness.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1:
The target of this embodiment manufactures the interlayer modified GFRP/Al composite laminated plate of gas-phase growth of carbon fibre (VGCF).
The material used has fiberglass reinforced plastics (GFRP) prepreg cloth (TOHOTenaxCo., Ltd. Dong Bangte Nike silk), aluminium 2017 (TOHOHitetsuKinzokuCo., Ltd. east nation nonferrous metal) and VGCF (ShowaDenkoK.K. Showa electrician).The parameter of material sees the following form:
Concrete making step is as follows:
1. 2 of degreasing aluminium alloy sheets being put into concentration is acidification 24 hours in the salpeter solution of 1mol/L, then with distilled water flushing to pH value in neutral.Oven dry surface moisture is stand-by.
2. the GFRP prepreg cloth getting 3 layers is folded with right angle gauge successively, ensures the uniformity of machine direction, and remains bubble toward surrounding flatiron to discharge interlayer from middle with the flatiron of 90-100 DEG C.
3. measure 10g/m
2vGCF, on GFRP, spray a small amount of alcohol prevents it from wafting to adsorb VGCF powder, be that zig-zag type is sprinkled upon VGCF on GFRP equably with the sieve that size of mesh opening is approximately 70 μm, afterwards that GFRP lamination is superimposed with aluminium alloy plate and make GFRP machine direction keep vertical with the pressor unit direction of aluminium sheet.The laminated layer sequence of the present embodiment is Al/GFRP0 ° of (3)/Al, i.e. each one deck aluminium sheet up and down, and middle three layers of machine direction are the GFRP prepreg cloth of 0 °.
4. the GFRP/Al laminate film folded is wrapped, then put hot press solidification into.First be heated to 80 DEG C from room temperature during solidification, constant temperature 30 minutes, is then heated to 130 DEG C, constant temperature 3 hours, naturally cools afterwards.
By end notches bending (ENF) experiment, we show that the interlaminar strength adding the GFRP/Al laminate of modification through surface acid etching and interlayer VGCF (does not have acid treatment than original sample, there is no VGCF adding layers) be improved significantly, II type fracture toughness improves 385%.In addition the present embodiment also proposed angle i.e. 90 ° and the 0 ° of impact on II mode Ⅱ fracture toughness between the pressor unit direction of machine direction and aluminium sheet.Through test determination, when machine direction is vertical with aluminium sheet pressor unit, II type Fracture Toughness exceeds 15.3%-73.6% than time parallel.
Embodiment 2:
The target of this embodiment manufactures the interlayer modified CFRP/Al composite laminated plate of VGCF.
The material used has carbon fibre reinforced plastic (CFRP) prepreg cloth (TOHOTenaxCo., Ltd. Dong Bangte Nike silk), aluminium 2017 (TOHOHitetsuKinzokuCo., Ltd. east nation nonferrous metal) and VGCF (ShowaDenkoK.K. Showa electrician).The parameter of material sees the following form:
Concrete making step is as follows:
1. 2 of degreasing aluminium alloy sheets being put into concentration is acidification 24 hours in the salpeter solution of 1mol/L, then with distilled water flushing to pH value in neutral.Oven dry surface moisture is stand-by.
2. the CFRP prepreg cloth getting 3 layers is folded with right angle gauge successively, ensures the uniformity of machine direction, and remains bubble toward surrounding flatiron to discharge interlayer from middle with the flatiron of 90-100 DEG C.
3. measure 20g/m
2vGCF, adopt ultrasonic stirrer that VGCF is dispersed in (amount of DMF should ensure good being dispersed in wherein of VGCF) in appropriate DMF solution, then add a certain amount of epoxy resin (VGCF weight: weight epoxy=1:5-15) to stir with planetary mixer, reuse ultrasonic stirrer to stir, then heat and DMF is vapored away, finally remaining VGCF reinforced epoxy uniform application on the fiberboard that will bond or metallic plate, afterwards that CFRP lamination is superimposed with aluminium alloy plate and make CFRP machine direction keep vertical with the pressor unit direction of aluminium sheet.The laminated layer sequence of the present embodiment is Al/CFRP0 ° of (3)/Al, i.e. each one deck aluminium sheet up and down, and middle three layers of machine direction are the CFRP prepreg cloth of 0 °.
4. the CFRP/Al laminate film folded is wrapped, then put in autoclave and solidify.First be heated to 80 DEG C from room temperature during solidification, constant temperature 30 minutes, is then heated to 130 DEG C, constant temperature 3 hours, naturally cools afterwards.
Tested by double cantilever beam (DCB), we show that the interlaminar strength adding the CFRP/Al laminate of modification through surface acid etching and interlayer VGCF is improved significantly, I type fracture toughness (does not have acid treatment than original sample, there is no VGCF adding layers) improve 41 times, improve 6.5 times than there is no the sample of VGCF adding layers through surface acid etching.
The manufacturing process of this method invention is simple, requires also not high to manufacturing equipment, but Be very effective, it is significant for the high performance fibre metal composite of manufacture.
Claims (7)
1. a preparation method for the interlayer modified fibre metal composite of nanometer adding layers, is characterized in that, comprise the following steps:
(1) surface treatment is carried out to metallic plate, to strengthen the bond strength with metallic plate;
(2) Fiber prepreg cut is folded against right angle gauge, keep machine direction consistent; Be that radioactivity flatiron Fiber prepreg is with bubble residual between extruding layer from centre to edge with the flatirons of 90 ~ 100 DEG C;
(3) use powder method or solwution method to add appropriate nanometer to the metal sheet surface and fibreboard surface that need bonding and strengthen additive; Then metallic plate and fiberboard alternative stacked, note in lamination making machine direction keep vertical with the material pressor unit direction of metallic plate;
(4) by the fibre metal laminate of step (3) gained, put solidification in hot press or autoclave into and obtain finished product.
2. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, it is characterized in that: in step (1), metal sheet surface is treated to mechanical grinding, electrochemical corrosion, acid treatment, laser ablation or plasma spraying, and described metallic plate has aluminium alloy plate, corrosion resistant plate or titanium alloy sheet.
3. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, is characterized in that: stating in step (2), the base material of Fiber prepreg is glass fibre, carbon fiber, cotton fibriia or bamboo fibre.
4. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, it is characterized in that: stating in step (3), it is single or multiple lift CNT, VGCF, acidifying VGCF, carbon black, Graphene or graphene oxide that nanometer strengthens additive.
5. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, it is characterized in that: stating in step (3), described powder method refers to Powdered nanometer additive, adopt the sieve of suitable sizing grid, quantitative nanometer powder Direct Uniform is sprinkled upon on the fiberboard or metallic plate that will bond.
6. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, it is characterized in that: stating in step (3), described solwution method refers to the nanometer additive to Powdered, graininess or sheet, adopting ultrasonic wave to stir is dispersed in nanometer additive in organic solution, then add a certain amount of epoxy resin to stir, afterwards heating acetone or DMF are vapored away, finally be left nanometer reinforced epoxy uniform application on the fiberboard that will bond or metallic plate.
7. the preparation method of the interlayer modified fibre metal composite of a kind of nanometer adding layers according to claim 1, it is characterized in that: in step (4), described is cured as gradient heating solidification, first being heated to certain temperature from room temperature keeps certain hour to make the softening flowing of resin, to reduce bubble, then be heated to more than solidification temperature, constant temperature certain hour solidifies rear cooling naturally completely.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104707888B (en) * | 2014-12-26 | 2016-09-14 | 中航复合材料有限责任公司 | A kind of fiber metal hybrid composite part laminated forming process |
| CN106079688A (en) * | 2016-06-02 | 2016-11-09 | 廊坊市高瓷新材料科技有限公司 | Reinforced structure and its preparation method |
| CN107234766B (en) * | 2017-06-27 | 2019-12-13 | 重庆大学 | Powder laminating process method for rapidly preparing magnesium-based fiber metal laminate |
| CN107379725A (en) * | 2017-07-10 | 2017-11-24 | 南京航空航天大学 | A kind of method and composite for improving titanium/fiber-reinforced composite laminates interface performance |
| CN108819369B (en) * | 2018-07-06 | 2020-07-24 | 西安拓邦航空科技有限公司 | Fiber reinforced resin matrix composite laminated board for aircraft |
| CN109504053B (en) * | 2018-07-12 | 2021-02-09 | 江苏华信新材料股份有限公司 | Polycarbonate laser etching film for smart card and preparation method thereof |
| CN110713611B (en) * | 2019-07-25 | 2022-04-15 | 北京汽车集团有限公司 | Interlaminar modification method of fiber reinforced composite material and fiber reinforced composite material |
| CN111231375A (en) * | 2020-01-14 | 2020-06-05 | 上海交通大学 | Hot forming and co-curing integrated forming method for CFRP/aluminum alloy composite structure |
| CN111231366B (en) * | 2020-01-14 | 2021-06-01 | 上海交通大学 | CFRP/aluminum alloy hot forming quenching aging co-curing integrated forming method |
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