CN102166840B - Z direction continuous carbon fiber prefabricated body - Google Patents
Z direction continuous carbon fiber prefabricated body Download PDFInfo
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- CN102166840B CN102166840B CN201110029797.4A CN201110029797A CN102166840B CN 102166840 B CN102166840 B CN 102166840B CN 201110029797 A CN201110029797 A CN 201110029797A CN 102166840 B CN102166840 B CN 102166840B
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Abstract
The invention relates to an improvement on Z direction continuous carbon fiber prefabrication, which is characterized in that: a planar laminated carbon fiber fabric is weftless carbon fiber cloth formed by arranging long fibers in an interlaminar crossing way. A Z direction structure is stable, and basically undamaged continuous carbon fibers are arranged in the three-dimensional direction of the prefabricated body, so that the isotropy of the prefabricated body is enhanced, and a three-dimensional structural framework is formed. A chopped fiber web in which fibers are randomly distributed is introduced between adjacent layers, and a plurality of holes are distributed randomly, so that the introduction and uniform distribution of matrix carbon are facilitated. Due to the adoption of the weftless fabric, the needle threading resistance is reduced, the Z direction continuous fiber interval can be enlarged, and the Z direction continuous fiber introducing efficiency is improved; and large K-beam carbon fibers can be adopted, so that the cost can be lowered by 40-60 percent. The prefabricated body provided by the invention can be taken as a structural material, a functional material and a structural-functional material.
Description
Technical field
The present invention relates to a kind of Z-direction has the charcoal fibre three-dimensional precast body of continuous carbon fiber, especially the improvement to existing continuous carbon fiber preform interlayer fabric.
Background technology
Prepare various high-performance C/C composites, all need first to prepare charcoal fibre three-dimensional precast body, charcoal fibre three-dimensional precast body (hereinafter to be referred as precast body) refers to that X-direction, Y-direction, Z-direction all have the structural strength of expectation.Yet because smooth armful of carbon fiber surface is poor with power, only adopt X-direction, Y-direction charcoal fiber or woven fabric superimposed, its interlayer bonding strength is extremely low, so the more employing acupuncture of prior art technology, in superimposed precast body Z-direction, introduce fiber reinforcement, thereby obtain, there is the precast body that three-dimensional fiber connects, for example: US Patent No. 5869411, Chinese patent 96121709,95191073, CN101575766, it is all to adopt acupuncture to form precast body that applicant formerly applies for a patent CN02138191.7 etc.This adopts acupuncture to introduce Z-direction fiber, to obtain the precast body of interlayer bonding strength, it still has deficiency: for example by acupuncture mode, in Z-direction, introduce interlayer and connect fiber, no doubt can strengthen precast body Z-direction structural strength, but objectively because of needle-penetration, to cross thickness limited in one's ability, so that interlayer Z-direction fiber connects thickness is also limited; Secondly, it is the staple fiber producing through acupuncture that Z-direction connects fiber, and acupuncture course sustains damage the X-direction of former lay and Y-direction fiber, two reasons cause Z direction strength (interlayer tension, shearing resistance) always very not high, are difficult to make Z direction strength and the high composite of overall construction intensity.
The deficiency strengthening in order to overcome acupuncture Z-direction, improve precast body interlayer adhesion, reduce layering, make Z-direction structure more stable, improve each same tropism, for example US Patent No. 4218276 adopts carbon fiber sheets to connect continuous fiber in Z-direction and makes precast body, and applicant also once adopted continuous carbon fiber longitudinally through mode, in Z-direction, to form continuous fiber, better reinforcement precast body Z-direction structural strength.Yet for making precast body have good structural strength, and the distribution of applicable pore structure, plane (X, Y-direction) mostly adopts little K bundle (1-6K) charcoal fibre fabric.Braid is many through broadwise fiber interweaving point, and for guaranteeing the smooth of interlayer woven cloth, conventionally need pre-to tension force, in longitude and latitude crosspoint, form like this moment, and woven cloth and thin each Moment Point spacing of K bundle fiber are shorter, when its tension force causes Z-direction puncture, resistance and friction are large,, puncture difficulty for example, for large thickness goods (>=300mm) venipuncture difficulty large, strengthen puncture dynamics and very easily cause again the out-of-flatness of interlayer cloth, out-of-flatness can affect the plane performance of precast body equally; Secondly, introduce the puncture of continuous fiber thick steel needle and also can damage X, Y-direction fiber, objectively can cause X, Y-direction performance to reduce; Besides, this continuous fiber adopts for example about 1.0-1.4 mm of little spacing, and not only manufacture difficulty is larger, and larger to plane X, Y-direction fibre damage, and more easily makes flat fabric produce fold, affects plane mechanical property.In addition, not only cost is high for little K bundle charcoal fiber, and braiding overlap joint node is many, easily cause fiber overlapped points effect of the interface deposition, easily causes follow-up carbon matrix to introduce inhomogeneous, and place, braided fiber overlap joint Cheng Weigong， intertwined point fiber bending also can cause plane performance to reduce.These all can cause the reduction of precast body mechanical property, or limit the raising of its performance.If adopted in Z-direction, arrange on pre-manufactured steel needle plate and successively stack carbon fabric, although above-mentioned, through the large deficiency of resistance, can be overcome, not only production efficiency obviously declines greatly, and actual industrialization is difficult for accepting, and other deficiencies are not overcome yet.Above-mentioned deficiency still has is worth improved place.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provides a kind of little to X, Y-direction fibre damage, and on plane performance, substantially without impact, and Z-direction fiber introduces easily, and the Z-direction that production efficiency is high has continuous carbon fiber preform.
The object of the invention realizes, and main improvement is that plane X, the employing of Y-direction charcoal fiber replace little K bundle woven fabric (through weft fabric) without latitude cloth, thereby overcomes the deficiencies in the prior art, realizes the object of the invention.Specifically, Z-direction of the present invention has continuous carbon fiber preform, comprises the successively carbon fabric of lay-up, and longitudinally has continuous carbon fiber to pass, it is characterized in that lay-up carbon fabric be long fibre interlayer intersect put without latitude carbon fiber sheet.
Before the detailed description, first by basic function and the effect that can reach invention, make a presentation, so that those skilled in the art have one clearly to understand to this patent general plotting technical scheme.
Precast body interlayer charcoal fiber of the present invention adopts laid fabric cloth, and interlayer long fibre intersection, because laid fabric only only has one direction tension force, and without fiber overlap joint, has reduced guiding puncture continuous fiber resistance; Secondly, fabric is directly and not crooked without weft fiber crossed fiber, both be conducive to the performance of fibre strength, simultaneously also few to fibre damage without weft fiber puncture of steel needles again, can eliminate two-way fabric completely and in preparation Z-direction, have the deficiency of continuous fiber precast body, make that X, Y, Z three-dimensional all have continuously and substantially without or damage less the precast body of fiber, can obtain all high, overall construction intensity good, mechanical property is excellent composites of three-dimensional intensity.
In addition,, for further improving interlayer associativity, improve the combination property of precast body, the net tire (claiming again non-woven mat) that can also made by short fiber without latitude cloth interlayer lay.Without latitude cloth interlayer lay net tire, net tire fiber random distribution, each the same tropism who has improved precast body, and net the form of the foetus formula has the porous of random distribution, not only for follow-up carbon deposit provides sufficient space, is conducive to the more charcoals of deposition, improved C/ C complex carbon residue; And deposition C-structure distribution performance is good, be conducive to improve the overall performance of making material.Depending on gained precursor structure intensity and performance requirement, net tire can with without latitude cloth, successively alternately put, also can some layers without latitude cloth lay one deck net tire.
In the present invention: without latitude cloth, with prior art, can adopt little K bundle charcoal fiber, but due to without latitude cloth without interweaving another to fiber, unidirectional fibre can obtain abundant expansion, has equally good pore structure, thereby can adopt the large K bundle fiber that price is relatively low.Without latitude carbon fiber sheet lamination lay, a kind of is better to adopt successively staggered or rotation lay, wherein especially take rotation lay as best, is more conducive to improve each same tropism.Z-direction continuous fiber, same prior art, to desired thickness, passes guiding continuous carbon fiber by draw point in flat stack.
Z-direction of the present invention has continuous carbon fiber preform, with respect to prior art, because adopting, interlayer replaces lay-up without latitude carbon fiber sheet or without latitude carbon fiber sheet and web of staple fibers tire, not only having retained prior art adopts continuous fiber Z-direction to pass, improve interlayer cohesive force and be difficult for layering, the constitutionally stable advantage of Z-direction, and make gained precast body three-dimensional be substantially undamaged continuous carbon fiber, improve each same tropism of precast body, thereby obtained good three-dimensional structure skeleton.Without latitude carbon fiber sheet, both utilized unidirectional fibre intensity, simultaneously owing to substantially there is no weft fiber, the damage to fiber when effectively minimizing introducing continuous fiber pin passes, little to the fibre damage of plane charcoal; Secondly, plane is to overlapping charcoal fiber without interlocking, and pin is little through resistance, and also greatly having improved threads a needle introduces the efficiency of Z-direction continuous fiber; Besides, without latitude measuring fiber, launch to obtain more evenly fine and closely woven pore structure.And without interweaving another to fiber, unidirectional fibre can obtain abundant expansion without latitude cloth, can adopt many large K bundle fibers (>=12 K) that price is low, same volume precast body, adopts large K bundle charcoal fiber, and cost can reduce 40-60%.Particularly interlayer is introduced the web of staple fibers tire of fiber random distribution, and net mold has random distribution porous, for follow-up carbon matrix, introduces more passage is provided, and is conducive to carbon matrix and introduces and be evenly distributed.Adopt large K bundle fiber, Z-direction has higher fiber volume fraction, thereby can strengthen Z-direction continuous fiber spacing, and Z-direction continuous carbon fibrillar center, apart from 1.5-5.0mm, connects Z-direction fiber difficulty thereby reduced, and do not reduce performance.Due to the raising of precast body performance, precast body of the present invention, both can be used as structural material, simultaneously can be used as again functional material, and structure and function have both material.Precast body of the present invention and C/ C composite have without latitude layer of cloth (can also have net plies) simultaneously, and Z-direction continuous whole fiber, for being different from prior art three-dimensional preformed body characteristics place.Precast body of the present invention, can differentiate interlayer fabric by metallographic or ESEM method.
Below in conjunction with two exemplary embodiments; essence of the present invention is further understood in exemplary illustration and help; but embodiment detail is only for the present invention is described; do not represent that the present invention conceives lower whole technical scheme; therefore should not be construed as the total technical scheme of the present invention is limited; some are In the view of technical staff; the unsubstantiality that does not depart from the present invention's design increases and/or changes; for example, to there is simple the change or replacement of technical characterictic of same or similar technique effect, all belong to protection domain of the present invention.
The specific embodiment
Embodiment 1: without latitude cloth lamination Z-direction, have continuous carbon fiber through precast body, precast body size 100 * 100 * 100mm
3, Z-direction fibrillar center is apart from 2mm.
Adopt the fibrage of 12K charcoal without latitude cloth, surface density 240g/m
2, cutting, without latitude cloth 100 * 100mm (10～20mm is amplified on each limit of actual cutting size), is successively ended lamination by long fibre direction rotation 60 degree lamination lay to desired thicknesses by what cut without latitude cloth.On 100 * 100mm platform, equidistant 2mm arranges longitudinal draw point matrix, X-direction and Y-direction draw point number are respectively 50, draw point matrix is passed to stratified fiber body, by root, replace draw point and connect the longitudinal continuous carbon fiber of 12K, closely knit 22～24 layers/cm that makes that pressurizes, form Z-direction have continuous carbon fiber without latitude cloth puncture fabric.Performance indications see attached list.
Embodiment 2: as embodiment 1, wherein at lamination during without latitude cloth, every interlayer has surface density 70g/m
2short carbon fiber net tire.The closely knit number of plies of pressurizeing is 16～18 layers/cm.Performance indications see attached list.
Comparative example: with example 2, the precast body that wherein flat fabric has latitude cloth to make for employing 3K.Performance indications see attached list.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge, those of ordinary skills will recognize also can adopt additive method, or the substituting of conventional known technology in prior art, and the equivalence of feature changes or modifies, mutual various combination between feature, for example charcoal fiber K number changes, the variation of net tire lamination quantity, the change of Z-direction continuous carbon fibrillar center distance, etc. unsubstantiality change, can be employed equally, can realize this patent representation function and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (2)
1. a Z-direction has continuous carbon fiber preform, comprise the successively carbon fabric of lay-up, and Z-direction has continuous carbon fiber to pass, it is characterized in that: lay-up carbon fabric be long fibre interlayer intersect put without latitude carbon fiber sheet, without latitude carbon fiber sheet interlayer, have charcoal fleece tire; Describedly without latitude carbon fiber sheet interlayer, intersect and to put as by machine direction interlayer rotation lay-up; Without latitude carbon fiber sheet charcoal fiber, be >=12 K charcoal fibers, Z-direction continuous carbon fibre bundle is >=12 K charcoal fibers.
2. Z-direction according to claim 1 has continuous carbon fiber preform, it is characterized in that Z-direction continuous carbon fibrillar center is apart from 1.5-5.0mm.
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| CN201110029797.4A CN102166840B (en) | 2011-01-27 | 2011-01-27 | Z direction continuous carbon fiber prefabricated body |
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| CN201110029797.4A CN102166840B (en) | 2011-01-27 | 2011-01-27 | Z direction continuous carbon fiber prefabricated body |
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| CN102166840B true CN102166840B (en) | 2014-01-15 |
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| CN103572709A (en) * | 2012-07-31 | 2014-02-12 | 翁庆隆 | Method of using laminated composite material to repair transportation facilities and laminated composite material structure |
| CN103482995B (en) * | 2013-08-06 | 2015-01-07 | 江苏天鸟高新技术股份有限公司 | Continuous carbon fiber reinforced crucible preform and preparation method thereof |
| CN104711775B (en) * | 2015-04-01 | 2017-07-21 | 赵晓明 | A kind of continuous decentralized filament fiber Nomex and preparation method thereof |
| CN108374163B (en) * | 2016-12-22 | 2020-03-17 | 中国航空制造技术研究院 | Preparation method of micro-lattice structure |
| CN108284619B (en) * | 2018-02-11 | 2020-07-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Interlayer toughening composite material, preparation method and application thereof |
| CN110485047B (en) * | 2019-09-18 | 2024-04-05 | 江苏恒神股份有限公司 | Quasi-three-dimensional preform for aircraft brake disc and preparation method thereof |
| CN111960841A (en) * | 2020-08-31 | 2020-11-20 | 陕西美兰德炭素有限责任公司 | Preparation method of crucible tray of single crystal furnace |
| CN114853495A (en) * | 2022-04-21 | 2022-08-05 | 西安超码科技有限公司 | Preparation method of carbon/carbon hot pressing mold for high-pressure hot pressing sintering furnace |
| CN115609997A (en) * | 2022-11-14 | 2023-01-17 | 广东韩研活性炭科技股份有限公司 | Modified honeycomb carbon forming method |
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| CA2077130C (en) * | 1991-09-04 | 2003-04-29 | Edward Lee Morris | Carbon fiber reinforced carbon/carbon composite and method of its manufacture |
| FR2726013B1 (en) * | 1994-10-20 | 1997-01-17 | Carbone Ind | PROCESS FOR PRODUCING A FIBROUS SUBSTRATE BY SUPERIMPOSING FIBROUS LAYERS AND SUBSTRATE THUS OBTAINED |
| EP0767265B1 (en) * | 1995-10-04 | 2000-12-20 | The B.F. Goodrich Company | Laminar fibrous structure having Z-fibers that penetrate a constant number of layers |
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| CN1408920A (en) * | 2002-08-27 | 2003-04-09 | 宜兴市天鸟高新技术有限公司 | Non-woven needle-punched fabric and quasi three-dimensional prefab |
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Address after: 214205 Yixing City, Wuxi Province, Central Branch Park apricot Road Patentee after: Jiangsu bird High Tech Co., Ltd. Address before: 214205 Yixing City, Wuxi Province, Central Branch Park apricot Road Patentee before: Jiangsu Tianniao High Technology Co., Ltd. |
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