CN111058187A

CN111058187A - Preparation method and equipment of SiC fiber prepreg tape attached with interface layer

Info

Publication number: CN111058187A
Application number: CN201911372714.4A
Authority: CN
Inventors: 阳海棠; 王培生; 黄小忠
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-24
Anticipated expiration: 2039-12-27
Also published as: CN111058187B

Abstract

The invention provides a preparation method of a SiC fiber prepreg tape attached with an interface layer, which comprises the following steps: after the continuous silicon carbide fiber bundle is unreeled, the continuous silicon carbide fiber bundle is led onto a tension pulley through a wire guide roller and a guide pulley, and the tension pulley straightly sends the continuous silicon carbide fiber bundle into a pulp removing device to spread the continuous silicon carbide fiber bundle; then the continuous silicon carbide fiber bundle is led into a sizing device through a guide wheel, so that the glue solution fully infiltrates the continuous silicon carbide fiber, and then the continuous silicon carbide fiber bundle is led into a filament spreading device, and the continuous silicon carbide fiber bundle is fully spread and shaped by a roller in the filament spreading device; feeding the fully-unfolded and shaped continuous silicon carbide fiber bundle into a winding roller to obtain a flat and uniform prepreg tape; the prepreg tape prepared by the invention can greatly improve the toughness of silicon carbide fibers, the deposited interface layers are uniform and consistent, the overlapping parts of two adjacent beams of fibers in the prepreg tape are few, the fiber bundles are good in smoothness and thin in thickness, and in addition, the preparation equipment can control parameters in real time and can realize full automation and complete controllability.

Description

Preparation method and equipment of SiC fiber prepreg tape attached with interface layer

Technical Field

The invention relates to the technical field of prepreg tape preparation, in particular to a preparation method and equipment of a SiC fiber prepreg tape with an interface layer.

Background

With the continuous progress of aerospace and aviation technologies, the requirements on materials are higher and higher, and compared with various different alloys, the composite material prepared from the carbon fiber or the silicon carbide fiber has obvious advantages in the aspects of density, high temperature resistance, service life and the like, wherein the ceramic matrix composite material prepared from the silicon carbide fiber has more outstanding advantages in the high-temperature oxidation resistance method.

The traditional method for preparing the silicon carbide fiber ceramic is to weave an interface layer firstly and then deposit the interface layer, for example, in a patent with the publication number of CN109650924A, a composite material is obtained by adopting a method of weaving a prefabricated body firstly and then depositing the interface layer, but if the thickness of a member is larger, the phenomenon that the interface layer at the center and the interface layer at the surface are not uniform is easily caused, and the integral performance of the member is not high.

Meanwhile, based on different requirements on the structure of the component and the characteristic that the silicon carbide fiber is high in brittleness, the fiber is seriously abraded, and the integral performance of the component cannot be improved by weaving and depositing the silicon carbide fiber at certain specific time. The traditional preform weaving scheme is mainly manual, the automatic production can be realized by the unidirectional tape laying method, the finished product of the component manufactured by the method is compact and can be molded in net size, the designability of later-stage component preparation can be realized, the component with the optimal mechanical property can be obtained, and the requirements of different service environments can be met. However, in the prior art, mainly for the research of carbon fiber prepreg tapes, for example, patent No. CN103158209B discloses a method for preparing a continuous carbon fiber reinforced thermoplastic prepreg tape, and patent No. CN 106239937 a discloses a device for preparing a continuous fiber reinforced thermoplastic prepreg tape, considering that silicon carbide fiber is a brittle material, and has low elongation at break and small elasticity, a preparation method and equipment for preparing a silicon carbide fiber prepreg tape are urgently needed to improve the performance of a silicon carbide fiber composite material.

Disclosure of Invention

Aiming at the problems in the prior art, the application provides a preparation method and equipment of a SiC fiber prepreg tape attached with an interface layer, the fiber interface layers at all positions of the prepared prepreg tape are uniform, the loss of silicon carbide fibers in the prepreg tape is less, burrs are avoided, and meanwhile, the preparation equipment can control parameters in real time and can realize full automation and complete controllability.

The technical scheme of the invention is as follows:

a preparation method of SiC fiber prepreg tape attached with an interface layer comprises the following steps:

s1: after the continuous silicon carbide fiber bundle is unreeled, the continuous silicon carbide fiber bundle is led to a tension pulley through a wire guide roller and a guide pulley, and the tension of the tension pulley is 1-10N;

s2: the tension pulley straightly sends the continuous silicon carbide fiber bundle into a pulp removing device, and the treatment solvent is acetone, so that the clustering agent on the surface of the continuous silicon carbide fiber is fully dissolved, and the continuous silicon carbide fiber bundle is unfolded;

s3: introducing the continuous silicon carbide fiber bundle subjected to the pulp removal treatment into a gluing device through a guide wheel, and controlling a scraper to obtain the continuous silicon carbide fiber bundle with the resin thickness of 0.1-0.5 mm through the traction action of a driving rubber wheel in the gluing device and the lubricating action of glue solution;

s4: introducing the continuous silicon carbide fiber bundle subjected to sizing treatment into a filament spreading device, and fully spreading the continuous silicon carbide fiber bundle by a roller in the filament spreading device;

s5: and (3) feeding the fully-unfolded and shaped continuous silicon carbide fiber bundle into a winding roller, and performing rolling treatment by a rolling roller arranged below the winding roller to obtain a flat and uniform prepreg tape.

The continuous silicon carbide fiber bundle in the step S1 is a modified continuous silicon carbide fiber bundle, and the pretreatment method includes:

(1) introducing the continuous silicon carbide fiber loose filaments into the interface layer by adopting a chemical vapor deposition process to obtain the silicon carbide fiber loose filaments with the surface attached with the interface layer;

(2) sizing the silicon carbide fiber loose filaments with the surface adhered with the interface layer to obtain continuous silicon carbide fiber bundles with slurry;

(3) and (3) carrying out fiber opening and shaping treatment on the continuous silicon carbide fiber bundle with the slurry to uniformly widen the continuous silicon carbide fiber bundle to obtain the continuous silicon carbide fiber bundle.

The interface layer is PyC, SiC or B₄C、ZrC、TaC、Si₃N₄And BN.

The chemical vapor deposition process specifically comprises the following steps: selecting a precursor according to the introduced interface layer, taking hydrogen as a reaction gas and argon as a dilution gas, introducing the gas into a chemical vapor deposition furnace by a bubbling method, wherein the deposition temperature is 500-1400 ℃, the deposition pressure is 0.5-12 KPa, the deposition time is 30-300 min, the deposition speed is 1-5 m/min, and the thickness of the deposited interface layer is 100 nm-2 mu m.

The precursor is one or more of methane, trichloromethylsilane, boron chloride, zirconium chloride, tantalum chloride, silicon chloride, boron halide and ammonia gas.

The glue solution in the gluing device in the step S3 is one or more of phenolic resin, boron phenolic resin, ammonia phenolic resin, barium phenolic resin, polyaryl acetylene resin, polyimide resin, furan resin, phenol triazine resin, benzoxazine resin, and asphalt.

In the step S4, the number of the roller is 12-30, and the heating temperature of the roller is controlled at 100-220 ℃.

In the step S5, the diameter of the wind-up roll is 300-350 mm, the rotating speed is 3-5 r/min, the pitch of the rolling roll is 0.5-2.0 mm, and the obtained prepreg tape has the thickness of 10 mu m-0.2 mm and the width of 200 mm-1000 mm. .

The utility model provides a preparation equipment of SiC fibre prepreg tape of adhesion boundary layer, includes godet roller, leading wheel, initiative wire feeding wheel, tension pulley, removes thick liquid device, rubberizing device, exhibition silk device, rolls roller and wind-up roll, continuous carborundum tow is from godet roller in proper order through leading wheel, initiative wire feeding wheel, tension pulley, remove thick liquid device, rubberizing device, exhibition silk device rolling in the wind-up roll, the leading wheel is used for continuous carborundum tow to turn to, and initiative wire feeding wheel one end sets up the drive, can drive continuous carborundum tow initiative and walk the line tension, the tension pulley keeps continuous carborundum tow initiative and walks the line tension.

Specifically, remove thick liquid device and include the solvent groove, the inside acetone liquid that is equipped with of solvent groove for removing thick liquid of continuous carborundum tow, the upper end in solvent groove sets up the apron, reduces volatilizing of acetone, the middle part in solvent groove sets up the Y type baffle of cutting apart solvent inslot space, and Y type baffle divide into thick washtrough and fine cleaning groove two parts with the solvent groove, sets up the intermediate roll in the upper end branch fork of baffle, the upper end of intermediate roll sets up the compression roller, and the inside in solvent groove is provided with the directive wheel, and the directive wheel is in introducing the acetone liquid with continuous carborundum tow, and continuous carborundum tow passes through between intermediate roll and compression roller, and the acetone liquid in continuous carborundum tow is extruded to the compression roller, and the through-hole of intercommunication thick washtrough is established to baffle upper end branch department, in the leading-in thick washtrough of the acetone liquid that will extrude. The continuous silicon carbide fiber bundle is subjected to the respective pulp removal treatment of rough washing and fine washing, so that the pulp removal effect is better. The length of the solvent tank in the invention is 120-180 mm.

Further, the stirring rollers for stirring acetone are arranged below the inner portions of the rough washing tank and the fine washing tank of the solvent tank, the slurry removing efficiency is improved, the heating plate is arranged inside the bottom plate of the solvent tank, the optimal slurry removing temperature is kept, and the slurry removing efficiency is also improved.

Further, the continuous silicon carbide fiber bundle enters an acetone recovery device from the pulp removing device, the acetone recovery device comprises an acetone removing chamber and an acetone volatilizing box for collecting acetone, the acetone removing chamber is positioned at the outlet of the solvent groove, the continuous silicon carbide fiber bundle after pulp removal passes through the acetone chamber, the acetone removing chamber is communicated with the acetone volatilizing box, the interior of the solvent tank is communicated with the acetone volatilizing box, heating plates are arranged on the bottom plates of the acetone removing chamber and the acetone volatilizing box and used for increasing the temperature and promoting the volatilization of the acetone, the continuous silicon carbide fiber bundle after pulp removal can quickly remove residual acetone through the acetone removing chamber, the acetone enters the acetone volatilizing box and is volatilized through reheating, the acetone enters the solvent tank again through the pumping of the circulating fan, so that the acetone recovery device reduces the volatilization of the acetone in the air, and the environment is protected.

Further, continuous carborundum tow gets into the rubberizing device from removing the acetone room, the rubberizing device includes the initiative rubber tyer, scrapes roller and gluey groove, the latter half of initiative rubber tyer is located the inside of gluey groove, and the glue solution is equipped with of the inside of gluey groove, continuous carborundum tow is followed the lower extreme of initiative rubber tyer passes through, carries out the sizing, the bottom of gluey groove sets up the heating block, and the heating block is used for keeping the best temperature of sizing, improves sizing efficiency, the outer wall ring cloth guide pulley of initiative rubber tyer reduces the friction of initiative rubber tyer to continuous carborundum tow. The length of the glue groove is 70-90 mm.

Furthermore, a group of scrapers is arranged at the wire outlet end of the driving rubber wheel, and the continuous silicon carbide fiber bundle passes through the scrapers to extrude out redundant glue solution and keep the thickness of the resin.

Further, continuous carborundum tow gets into the exhibition silk device from the rubberizing device, the roller that the exhibition silk device includes the setting of at least three horizontal arrangement, and continuous carborundum tow passes the roller of horizontal arrangement from top to bottom for the expansion and the design of continuous carborundum tow, the inside of roller sets up the hot plate, promotes the drying of continuous carborundum tow.

Further, the wind-up roll is rolled up continuous carborundum tow, sets up the heating plate in the wind-up roll, exhibition silk device sets up the thickness detector with the wind-up roll, the calibrator is non-contact's online thickness profile measurement system, adopts X ray calibrator, laser calibrator, infrared calibrator or ultrasonic thickness calibrator, thickness that can real-time accurate measurement preimpregnation area, calibrator electricity connection director.

Further, one side of wind-up roll sets up rolls the roller, thereby rolls the processing of continuous carborundum tow on to the wind-up roll and obtains level and smooth, even preimpregnation area.

The solvent tank, the glue tank, the roller and the winding roller are all provided with heating blocks, the heating blocks are electrified heating wires, switches of the heating blocks are electrically controlled, the heating blocks are electrically connected with the controller, and the controller is also electrically connected with the tension wheel and the rolling roller.

The beneficial technical effects of the invention are as follows:

1. the interface layer is deposited before the silicon carbide fiber is prepared into the prepreg tape, so that the problems of high brittleness, low elongation at break and low elasticity of the silicon carbide fiber can be effectively solved, the toughness of the silicon carbide fiber can be greatly improved, the phenomenon of filament breakage and brittle fracture in the process of preparing the prepreg tape is avoided, and the smoothness of preparing the silicon carbide fiber prepreg tape with the interface layer and the excellent performances of the prepreg tape are ensured.

2. The silicon carbide fiber is subjected to primary sizing treatment after the interface layer is deposited, so that the silicon carbide fiber can be prevented from being broken, the surface damage of the silicon carbide fiber caused by a guide wheel can be reduced, simultaneously, after a sizing agent is dissolved and then glued, the flatness of a fiber bundle can be further improved, the overlapping part of two adjacent fiber bundles in a prepared prepreg tape is less, the fiber bundle is thinner, the flatness of the fiber bundle is good, and no bulge or pit is formed on the surface of the prepreg tape, so that when a laminated component is prepared, interlayer combination is more uniform, the performances of all parts of the component are consistent, and the thinner and more uniform surface quality of the component prepared in the later stage of the unidirectional tape is higher.

3. The method of depositing the interface layer and then manufacturing the prepreg tape can effectively ensure that the silicon carbide fiber is complete, less broken filaments and no burrs exist, better maintains various performances of the fiber, simultaneously has high deposition speed and short deposition period under the condition of ensuring that the interface layer on the surface of the silicon carbide fiber is uniform and consistent, can reduce the production period and improve the production efficiency while ensuring the product quality, and in addition, the silicon carbide fiber attached with the interface layer has excellent adhesive property with resin, can effectively improve the mechanical property of the silicon carbide fiber prepreg tape, thereby more accurately predicting the mechanical property of a woven member.

4. The sizing treatment can increase the softness of the prepreg tape and facilitate laying, and the sizing resin adopts resin with high residual carbon content, so that the interlayer force can be increased during later pyrolysis, the interface layer is ensured not to be easy to disperse or slide, and residual carbon elements can react with silicon at high temperature to generate silicon carbide during later densification treatment, thereby further increasing the compactness and uniformity of the silicon carbide prepreg tape; in addition, the resin with high carbon residue rate has the advantages of high temperature resistance and thermal corrosion resistance, and can better promote the application of the silicon carbide fiber prepreg tape in the aerospace field.

5. After the continuous silicon carbide fiber bundle passes through the rubber wheel, the silicon carbide fiber passes through a plurality of roller rollers, so that the fiber bundle is conveniently unfolded, the brittle failure of the silicon carbide fiber can be effectively reduced through heating treatment in the roller rollers, meanwhile, the roller rollers are also provided with rolling wheels for rolling the prepreg tape, the fiber bundle is unfolded more, the pitch value is relatively higher, the uniform prepreg tape with low porosity and thin thickness can be obtained, the prepreg tape can be used for preparing ceramic components with more complex structures, and the performance is excellent.

6. The prepreg tape preparation equipment is provided with a thickness detection and regulation and control system, thickness data are detected by a thickness gauge, data parameters are transmitted to the controller, and the controller regulates the tension of the tension pulley, the heating temperature and the pressure of the rolling roller according to the thickness data, so that full automation is realized, the equipment can control the parameters in real time according to the thickness detected by the thickness gauge, the thickness and the thickness uniformity of the prepreg tape are ensured, manpower is saved, and the prepreg tape preparation equipment is completely controllable.

7. The solvent tank of the prepreg tape preparation equipment is divided into a plurality of solvent tanks, the solvent tanks can carry out the respective desizing treatment on the continuous silicon carbide fiber bundles through rough washing and fine washing, the desizing effect is improved, the outlet of each solvent tank is provided with an acetone recovery device, the drying speed of acetone of the continuous silicon carbide fiber bundles is accelerated, acetone volatilized from the continuous silicon carbide fiber bundles is recovered, the volatilization of the acetone in the air is reduced, and the environment friendliness is facilitated.

Drawings

FIG. 1 is a schematic view of an apparatus for preparing a SiC fiber prepreg tape with an interface layer according to the present invention.

FIG. 2 is a schematic structural diagram of a gluing device of a preparation device of the SiC fiber prepreg tape attached with the interface layer.

Fig. 3 is a scanning electron micrograph of a SiC fiber with a PyC interface layer attached in example 1.

FIG. 4 shows example 4 with Si attached₃N₄Scanning electron micrographs of SiC fibers of the interfacial layer.

Fig. 5 is a scanning electron microscope image of an SiC fiber having a BN interface layer adhered thereto in example 5.

Fig. 6 is a photograph of a SiC fiber prepreg tape with a PyC interface layer attached in example 1.

In the figure: 1. a godet roller; 2. a guide wheel; 3. a driving wire feeding wheel; 4. a tension pulley; 5. a solvent tank; 6. A driving rubber wheel; 7. a scraper; 8. a glue groove; 9. a roller; 10. a wind-up roll; 11. rolling a roller; 12. heating plates; 13. a thickness gauge; 14. an acetone removal chamber; 15. an acetone volatilization box; 151. a circulation fan; 51. a partition plate; 52. a steering wheel; 53. a stirring roller; 54. an intermediate roll; 55. and (4) pressing the rolls.

Detailed Description

The present invention will be described in detail with reference to the accompanying fig. 1 and the embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The embodiment provides a preparation method of a SiC fiber prepreg tape attached with an interface layer, which comprises the following steps:

s1: after the continuous silicon carbide fiber bundle is unreeled, the continuous silicon carbide fiber bundle is led onto a tension pulley 4 through a wire guide roller 1 and a guide pulley 2, and the tension of the tension pulley 4 is 1N and is used for stabilizing the tension of the continuous silicon carbide fiber bundle;

s3: introducing the continuous silicon carbide fiber bundle subjected to the pulp removal treatment into a gluing device through a guide wheel, and controlling a scraper to obtain the continuous silicon carbide fiber bundle with the resin thickness of 0.1mm through the traction action of a driving rubber wheel in the gluing device and the lubricating action of glue solution;

s5: and (3) feeding the fully-unfolded and shaped continuous silicon carbide fiber bundle into a winding roller 10, and performing rolling treatment by using a rolling roller 11 arranged below the winding roller 10 to obtain a flat and uniform prepreg tape, as shown in fig. 6.

The preparation method of the continuous silicon carbide fiber bundle in the step S1 includes the following steps:

(1) introducing the continuous silicon carbide fiber loose filaments into a PyC interface layer by adopting a chemical vapor deposition process to obtain silicon carbide fiber loose filaments with the surface attached with the PyC interface layer;

(2) sizing the silicon carbide fiber loose filaments with the PyC interface layers attached to the surfaces to obtain continuous silicon carbide fiber bundles with the pulp;

The chemical vapor deposition process specifically comprises the following steps: selecting methane as a precursor, hydrogen as a reaction gas and argon as a diluent gas, introducing the gases into a chemical vapor deposition furnace by a bubbling method, wherein the deposition temperature is 1400 ℃, the deposition pressure is 12KPa, the deposition speed is 5m/min, the deposition time is 60min, the thickness of a deposited interface layer is 1 μm, and the obtained SiC fiber attached with a PyC interface layer is shown in figure 3;

and the glue solution in the gluing device in the step S3 is phenolic resin.

The number of the roller 9 in step S4 is 12, and the heating temperature of the roller 9 is controlled to 100 ℃.

In step S5, the diameter of the wind-up roll 10 is 300mm, the rotating speed is 5r/min, the pitch of the rolling roll 11 is 0.5mm, the thickness of the obtained prepreg tape is 10um, and the width of the prepreg tape is 200 mm.

The utility model provides a preparation equipment of SiC fibre prepreg tape of adhesion boundary layer, refers to figure 1, includes godet roller 1, leading wheel 2, initiative wire feeding wheel 3, tension pulley 4, removes thick liquid device, rubberizing device, exhibition silk device, rolls roller 11 and wind-up roll 10, continuous carborundum fibre bundle passes through leading wheel 2, initiative wire feeding wheel 3, tension pulley 4, removes thick liquid device, rubberizing device, exhibition silk device rolling in wind-up roll 10 from godet roller 1 in proper order, leading wheel 2 is used for continuous carborundum fibre bundle to turn to, and 3 one end of initiative wire feeding wheel sets up the drive, can drive continuous carborundum fibre bundle initiative and walk the line, tension pulley 4 keeps continuous carborundum fibre bundle initiative and walks line tension.

Specifically, referring to fig. 2, the slurry removing device includes a solvent tank 5, acetone liquid is filled in the solvent tank 5 and used for removing slurry of the continuous silicon carbide fiber bundle, a cover plate is arranged at the upper end of the solvent tank 5 to reduce volatilization of acetone, a Y-shaped partition plate 51 for dividing the internal space of the solvent tank 5 is arranged in the middle of the solvent tank 5, the solvent tank 5 is divided into a rough washing tank and a fine washing tank by the Y-shaped partition plate 51, a middle roller 54 is arranged in a branch at the upper end of the partition plate 51, a press roller 55 is arranged at the upper end of the middle roller 54, a steering wheel 52 is arranged in the solvent tank 5, the continuous silicon carbide fiber bundle is introduced into the acetone liquid by the steering wheel 52, the continuous silicon carbide fiber bundle passes between the middle roller 54 and the press roller 55, the acetone liquid in the continuous silicon carbide fiber bundle is extruded by the press roller 55, a through hole communicated with the rough washing tank is arranged at a branch at, the extruded acetone solution was introduced into a rough wash tank. The continuous silicon carbide fiber bundle is subjected to the respective pulp removal treatment of rough washing and fine washing, so that the pulp removal effect is better. The length of the solvent tank 5 in the present invention is 120 to 180 mm.

Further, the stirring rollers 53 for stirring acetone are arranged below the inner portions of the rough washing tank and the fine washing tank of the solvent tank 5, the slurry removing efficiency is improved, the heating plate 12 is arranged inside the bottom plate of the solvent tank 5, the optimal slurry removing temperature is kept, and the slurry removing efficiency is also improved.

Further, the continuous silicon carbide fiber bundle enters the acetone recovery device from the pulp removal device, the acetone recovery device comprises an acetone removal chamber 14 and an acetone volatilization box 15 used for collecting acetone, the acetone removal chamber 14 is positioned at a wire outlet of the solvent groove 5, the continuous silicon carbide fiber bundle after pulp removal passes through the acetone chamber 14, the acetone removal chamber 14 is communicated with the acetone volatilization box 15, the inside of the solvent groove 5 is communicated with the acetone volatilization box 15, the bottom plates of the acetone removal chamber 14 and the acetone volatilization box 15 are both provided with a heating plate 12, the heating plate 12 is used for increasing the temperature and promoting the acetone volatilization, the continuous silicon carbide fiber bundle after pulp removal can quickly remove residual acetone through the acetone removal chamber 14, the acetone enters the acetone volatilization box 15 and is volatilized again through heating and then enters the solvent groove 5 through the pumping of the circulating fan 151, so that the acetone recovery device, the volatilization of acetone in the air is reduced, which is beneficial to environmental protection.

Further, continuous carborundum tow gets into the rubberizing device from going acetone room 14, the rubberizing device includes initiative rubber tyer 6, scraping roller 7 and glue groove 8, the latter half of initiative rubber tyer 6 is located the inside of glue groove 8, and the glue solution is equipped with of glue groove 8's inside, continuous carborundum tow is followed the lower extreme process of initiative rubber tyer 6 carries out the sizing, the bottom of glue groove 8 sets up heating block 12, and heating block 12 is used for keeping the sizing optimum temperature, improves sizing efficiency, the outer wall ring cloth guide pulley of initiative rubber tyer 6 reduces the friction of initiative rubber tyer 6 to continuous carborundum tow. The length of the glue groove is 70-90 mm.

Furthermore, a group of scrapers 7 is arranged at the wire outlet end of the driving rubber wheel 6, and the continuous silicon carbide fiber bundle passes through the scrapers 7 to extrude out redundant rubber liquid and keep the thickness of resin.

Further, continuous carborundum tow gets into the exhibition silk device from the rubberizing device, the exhibition silk device includes the roller 9 of the setting of at least three horizontal arrangement, and continuous carborundum tow passes horizontal arrangement's roller 9 from top to bottom for the expansion and the design of continuous carborundum tow, the inside of roller 9 sets up hot plate 12, promotes the drying of continuous carborundum tow.

Further, wind-up roll 10 rolls up continuous carborundum tow, sets up hot plate 12 in the wind-up roll 10, exhibition silk device sets up thickness detector 13 with wind-up roll 10, calibrator 13 is non-contact's online thickness profile measurement system, adopts X ray calibrator, laser calibrator, infrared calibrator or ultrasonic thickness calibrator, thickness that can real-time accurate measurement preimpregnation area, calibrator 13 electric connection director.

Further, one side of wind-up roll 10 sets up rolls roller 11, rolls roller 11 and rolls thereby obtains level and smooth, even preimpregnation area to the continuous carborundum tow on wind-up roll 10.

The solvent tank 5, the glue tank 8, the roller 9 and the winding roller 10 are all provided with heating blocks 12, the heating blocks 12 are electrified heating wires, switches of the heating blocks 12 are electrically controlled, the heating blocks are electrically connected with the controller, and the controller is also electrically connected with the tension wheel and the rolling roller.

Example 2

Compared with the embodiment 1, the difference of the method and the device for preparing the SiC fiber prepreg tape with the interface layer is that:

the tension wheel 4 adjusts the tension to be 5N.

The heating treatment temperature is 60 ℃, and the solvent is absolute ethyl alcohol.

The glue solution in the gluing device is phenolic resin, the heating temperature is controlled at 80 ℃, and the thickness of the resin is controlled at 0.3 mm.

The number of the roller 9 is 30, and the heating temperature of the roller is controlled at 160 ℃.

The diameter of wind-up roll 10 is 320mm, and the rotational speed is 4r/min, roll 10 pitch is 2mm, and the thickness that obtains the preimpregnation area is 0.2mm, and the width is 1000 mm.

The thickness gauge 13 is a laser thickness gauge.

Example 3

the tension wheel 4 adjusts the tension to be 10N.

The heating treatment temperature of the pulp removing device is 80 ℃, and the solvent is absolute ethyl alcohol.

The glue solution in the gluing device is phenolic resin, the heating temperature is controlled at 100 ℃, and the thickness of the resin is controlled at 0.1 mm.

The number of the roller 9 is 20, and the heating temperature of the roller is controlled at 100 ℃.

The diameter of wind-up roll 10 is 300mm, and the rotational speed is 5r/min, 11 pitch of roll-up roll 1.6mm, the thickness that obtains the preimpregnation area is 0.1mm, and the width is 500 mm.

The thickness gauge 13 is an ultrasonic thickness gauge.

Example 4

(1) introducing Si into the continuous silicon carbide fiber loose filaments by adopting a chemical vapor deposition process₃N₄An interface layer having Si adhered to the surface₃N₄Silicon carbide fiber loose filaments on the interface layer;

(2) attaching Si to the surface₃N₄Sizing the silicon carbide fiber loose filaments on the interface layer to obtain a continuous silicon carbide fiber bundle with slurry;

The chemical vapor deposition process specifically comprises the following steps: trichloromethylsilane and ammonia gas are used as precursors, hydrogen gas is used as reaction gas, argon gas is used as diluent gas, the gas is introduced into a chemical vapor deposition furnace through a bubbling method, the deposition temperature is 500 ℃, the deposition speed is 5m/min, the deposition pressure is 0.5KPa, the deposition time is 600min, the thickness of the deposited interface layer is 600nm, and the obtained attached layer is attached to the surface of the substrateWith Si₃N₄The SiC fibers of the interfacial layer are shown in fig. 4.

Example 5

(1) introducing the continuous silicon carbide fiber loose filaments into a BN interface layer by adopting a chemical vapor deposition process to obtain silicon carbide fiber loose filaments with the BN interface layer attached to the surface;

(2) sizing the silicon carbide fiber loose filaments with the BN interface layer attached to the surface to obtain a continuous silicon carbide fiber bundle with slurry;

The chemical vapor deposition process specifically comprises the following steps: boron chloride and ammonia gas are used as precursors, hydrogen gas is used as reaction gas, argon gas is used as dilution gas, the gases are introduced into a chemical vapor deposition furnace through a bubbling method, the deposition temperature is 500 ℃, the deposition speed is 3m/min, the deposition pressure is 0.5KPa, the deposition time is 600min, the thickness of the deposited interface layer is 400nm, and the obtained SiC fiber attached with the BN interface layer is shown in figure 5.

Example 6

the glue solution in the gluing device is polyaryl acetylene resin.

Example 7

the glue solution in the gluing device is benzoxazine resin.

Comparative example 1

Compared with the embodiment 1, the preparation method and the equipment of the SiC fiber prepreg tape of the comparative example with the interface layer are different in that:

the surface of the silicon carbide fiber is not modified.

Comparative example 2

the sizing resin is polyethylene resin.

Comparative example 3

and preparing the silicon carbide fiber prepreg tape by adopting the carbon fiber prepreg tape equipment.

Comparative example 4

And preparing the silicon carbide fiber prepreg tape by adopting unmodified silicon carbide fibers.

Test example 1

Thickness, porosity and thickness uniformity of the prepreg tapes obtained in examples 1 to 7 and comparative examples 1 to 4 were measured according to GB/T1966-:

TABLE 1

The thickness uniformity is the standard deviation of the thickness at 50 test points randomly selected for the prepreg tapes of examples 1-7 and comparative examples 1-4.

Test example 2

Winding and forming the prepreg tapes obtained in the examples 1-7 and the comparative examples 1-4 by adopting the following steps: cleaning the surface of the die by using acetone until the surface of the die is in an impurity-free adhesion state, uniformly coating the surface of the die with an epoxy resin demolding agent for 2 times, and heating the die to 40 ℃; winding the prepreg tape on the surface of the die by a winding machine, and winding the prepreg tape from inside to outside in a gradient decreasing mode of winding tension, wherein the winding angle is +/-60 degrees, the winding speed is 0.5m/s, the winding tension is 6N/cm, and the winding thickness is 3 mm; and then curing and demolding to obtain the component.

Bending test sample strips are prepared according to the standard of ASTMD790, short beam interlaminar shear test sample strips are prepared according to the standard of ASTMD2344, cantilever beam notched impact test sample strips are prepared according to the standard of ASTMD256, and the bending performance, the interlaminar shear strength and the notched impact strength of the obtained material are respectively tested, and the test results are shown in table 2.

TABLE 2

The silicon carbide fiber prepreg tape prepared by the method has the advantages of thin thickness, good smoothness and small lamination rate of adjacent fiber bundles, and the preparation method can effectively overcome the defects of large brittleness, low elongation and small elasticity of the silicon carbide fiber and ensure excellent mechanical property of the silicon carbide fiber prepreg tape.

While the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and embodiments, but is fully applicable to various fields suitable for the present invention, and it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principle and spirit of the present invention, and therefore the present invention is not limited to the specific details without departing from the general concept defined in the claims and the scope of equivalents.

Claims

1. A preparation method of SiC fiber prepreg tape attached with an interface layer is characterized by comprising the following steps:

2. The method according to claim 1, wherein the continuous silicon carbide fiber bundle in the step S1 is a modified continuous silicon carbide fiber bundle, and the pretreatment is carried out by:

(2) and (3) carrying out fiber opening and shaping treatment on the silicon carbide fiber with the surface attached with the interface layer, so that the continuous silicon carbide fiber bundle is uniformly widened, and the continuous silicon carbide fiber bundle is obtained.

3. The method of claim 2, wherein the interfacial layer is PyC, SiC, B₄C、ZrC, H fiber C, TaC, Si₃N₄And BN.

4. The method according to claim 2, wherein the chemical vapor deposition process is in particular: selecting a precursor according to the introduced interface layer, taking hydrogen as a reaction gas and argon as a diluent gas, introducing the gases into a chemical vapor deposition furnace by a bubbling method, wherein the deposition temperature is 500-1400 ℃, the deposition pressure is 0.5-12 KPa, the deposition time is 30-300 min, the deposition speed is 1-5 m/min, and the thickness of the deposited interface layer is 100 nm-2 mu m.

5. The method according to claim 4, wherein the precursor is one or more of methane, trichloromethylsilane, boron chloride, zirconium chloride, tantalum chloride, silicon chloride, boron halide and ammonia gas.

6. The method according to claim 1, wherein the glue solution in the gluing device in step S3 is one or more of phenolic resin, boron phenolic resin, ammonia phenolic resin, barium phenolic resin, polyaryl acetylene resin, polyimide resin, furan resin, phenol triazine resin, benzoxazine resin, and asphalt.

7. The method as claimed in claim 1, wherein the number of the roll in the step S4 is 12-30, and the heating temperature of the roll is controlled at 100-220 ℃.

8. The method according to claim 1, wherein in step S5, the diameter of the wind-up roll is 300-350 mm, the rotating speed is 3-5 r/min, the pitch of the rolling roll is 0.5-5.0 mm, and the thickness of the prepreg tape is 10 μm-0.2 mm, and the width is 200 mm-1000 mm.

9. A preparation device of SiC fiber prepreg tape with an adhesion interface layer for the method according to any one of claims 1 to 8, which is characterized by comprising a godet roller, a guide wheel, a driving wire feeding wheel, a tension wheel, a slurry removing device, a sizing device, a wire spreading device, a rolling roller and a winding roller, wherein the continuous silicon carbide fiber bundle is wound on the winding roller from the godet roller through the guide wheel, the driving wire feeding wheel, the tension wheel, the slurry removing device, the sizing device and the wire spreading device in sequence;

the slurry removing device comprises a solvent tank, a Y-shaped partition plate for dividing the internal space of the solvent tank is arranged in the middle of the solvent tank, a middle roller is arranged in a fork at the upper end of the partition plate, a press roller is arranged at the upper end of the middle roller, a continuous silicon carbide fiber bundle passes through the middle roller and the press roller, a stirring roller for stirring acetone is arranged below the inside of the solvent tank, and a heating plate is arranged inside a bottom plate of the solvent tank;

the gluing device comprises a driving rubber wheel, a scraping roller and a rubber groove, the lower half part of the driving rubber wheel is positioned in the rubber groove, the bottom of the rubber groove is provided with a heating block, the continuous silicon carbide fiber bundle passes through the lower end of the driving rubber wheel, the outer wall of the driving rubber wheel is annularly distributed with a guide wheel, the wire outlet end of the driving rubber wheel is provided with a group of scrapers, and the continuous silicon carbide fiber bundle passes through the scrapers;

exhibition silk device includes the roller of the setting of at least three horizontal arrangement, the inside of roller sets up the hot plate, exhibition silk device sets up the thickness detector with the wind-up roll.

10. The apparatus according to claim 9, wherein an acetone recovery device is further arranged outside the solvent tank, the acetone recovery device comprises an acetone removal chamber through which the continuous silicon carbide fiber bundle subjected to pulp removal can pass and an acetone volatilization box for collecting acetone, the acetone removal chamber is communicated with the acetone volatilization box, the inside of the solvent tank is communicated with the acetone volatilization box, and heating plates are arranged on the bottom plates of the acetone removal chamber and the acetone volatilization box.