CN115745640B - Forming process of ceramic matrix composite slender thin-wall pipe - Google Patents
Forming process of ceramic matrix composite slender thin-wall pipe Download PDFInfo
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- CN115745640B CN115745640B CN202211362260.4A CN202211362260A CN115745640B CN 115745640 B CN115745640 B CN 115745640B CN 202211362260 A CN202211362260 A CN 202211362260A CN 115745640 B CN115745640 B CN 115745640B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a ceramic matrix composite slender thin-wall pipe forming process, and relates to the technical field of thin-wall pipe forming. A ceramic matrix composite slender thin-wall tube forming process comprises the following steps of 1, preparing a fiber fabric; 2. placing the fiber fabric into a forming tool for preparation and forming; 3. placing the molded fiber fabric into a calibrating tool to prepare a calibrating tool; 4. the fiber fabric after the correction is prepared by adopting a vertical hanging method. The process can prevent the fiber fabric from deforming in the preparation process, achieve the uniformity of wall thickness and straightness meeting the use requirement, and solve the problem of distortion in the forming process of the thin-wall tube ceramic matrix composite fiber fabric with super-length-diameter ratio.
Description
Technical Field
The invention relates to the technical field of thin-wall tube forming, in particular to a ceramic matrix composite slender thin-wall tube forming process.
Background
The description of the background art to which the present invention pertains is merely for illustrating and facilitating understanding of the summary of the invention, and should not be construed as an explicit recognition or presumption by the applicant that the applicant regards the prior art as the filing date of the first filed application.
The super-length-diameter ratio thin-wall cladding tube is an important component of a columnar core of a modular high-temperature nuclear reactor, wherein a plurality of cladding tubes are arranged in parallel to form an array structure to form the columnar core. The cladding tube core is mainly used for cladding fuel particles, and coolant flows from the space between the cladding tube matrixes to complete heat exchange. The length of use of the super-length-diameter ratio thin-walled cladding tube is generally in the range of 200-4000 mm, the wall thickness of the tube is 1-3 mm, and the diameter of the tube is generally smaller than 30mm.
SiC f The SiC ceramic matrix composite material is used as a novel thermal structure/function integrated strategic material, has the characteristics of low density, high temperature resistance, gao Bijiang, high-modulus, oxidation resistance, ablation resistance, insensitivity to cracks, no catastrophic damage and the like, and is widely applied to the heavy-point fields of aviation, aerospace, nuclear power, photovoltaics and the like. The cladding tube is prepared by adopting silicon carbide cloth and then adopting chemical vapor deposition, the fiber is integrally formed, the fiber continuity is strong, and compared with the traditional metal material, the cladding tube is lighter in weight and more resistant to high temperature, but the cladding tube is easy to distort and deform due to the stress effect in the chemical vapor deposition preparation process, and the use requirement of the cladding tube cannot be met.
Disclosure of Invention
The invention aims to provide a ceramic matrix composite slender thin-wall tube forming process, which aims to solve the problem that an existing cladding tube is easy to distort and deform due to stress in the chemical vapor deposition preparation process.
The technical scheme for solving the technical problems is as follows:
a ceramic matrix composite slender thin-wall tube forming process comprises the following steps:
s1: wrapping a layer of paper core outside the metal inner core, and then wrapping fiber fabrics with a certain thickness outside the paper core;
s2: placing the fiber fabric with the metal inner core and the paper core in a forming tool, slowly extracting the metal inner core, and then placing the forming tool in a chemical vapor deposition furnace to sequentially prepare a carbon interface layer and a silicon carbide matrix for shaping the fiber fabric;
s3: placing the molded fiber fabric into a calibration tool, and then repeatedly feeding the calibration tool into and discharging the chemical vapor deposition furnace to prepare a silicon carbide matrix, wherein the silicon carbide matrix is used for preventing the fiber fabric from deforming in the chemical vapor deposition process;
s4: and hanging the fiber fabric subjected to the correction in a chemical vapor deposition furnace by adopting a vertical hanging method, and then repeatedly feeding the fiber fabric into and discharging the fiber fabric from the chemical vapor deposition furnace to prepare a silicon carbide matrix, so as to obtain the hollow fiber fabric with higher densification, better straightness, uniform density distribution and higher rigidity.
The beneficial effects of adopting above-mentioned technical scheme are: the fiber fabric of the technical scheme is an elongated thin-wall tube, the metal inner core has a certain supporting force, the fiber fabric is formed into the thin-wall tube with uniform wall tube, the fiber fabric wrapped with the metal inner core and the paper core is placed in the forming tool to prepare the carbon interface layer and the silicon carbide matrix, the contact area between the fiber fabric and the forming tool is large, the fiber fabric is not easy to loose and deform, the forming tool plays a fixed role, and the fiber fabric is prevented from being distorted and deformed in the forming process. The formed fiber fabric has increased density and certain rigidity, and can be subjected to shaping by being placed in a shaping tool, and can be placed in a chemical vapor deposition furnace together with the fiber fabric for retreatment. The fiber fabric after molding and shaping treatment has better rigidity and straightness, at the moment, the fiber fabric can be placed into a chemical vapor deposition furnace for densification treatment by adopting a vertical suspension method without a molding tool and a shaping tool, and the fiber fabric is inevitably deformed under the action of stress in the preparation process. The method solves the problems that the existing method can not realize the distortion and deformation of the thin-wall tube ceramic matrix composite fiber fabric in the forming process of the super-length-diameter ratio, so that the processing process is eccentric, the wall thickness of the fiber fabric is uneven, and the production and use requirements can not be met.
Further, in step S2, the forming tool includes an upper die and a lower die, the die clamping surfaces of the upper die and the lower die are respectively provided with an arc groove, and the two arc grooves form a placing cavity for placing the fiber fabric; a plurality of reinforcing frames are sleeved after the upper die and the lower die are clamped, and graphite wedge blocks are respectively arranged between the reinforcing frames and the outer walls of the upper die and the lower die; the placing cavities are at least two.
The technical scheme has the beneficial effects that: the method comprises the steps of firstly placing fiber fabrics in arc grooves of a lower die, enabling two ends of the fiber fabrics to extend to two ends of the arc grooves, then closing the upper die and the lower die, sequentially sleeving the upper die and the lower die through a plurality of reinforcing frames after closing, enabling certain gaps to exist between the top wall of the upper die and the reinforcing frames, between the side wall of the upper die and the reinforcing frames and between the side wall of the lower die and the reinforcing frames, respectively placing graphite wedges at the gaps, and enabling the fiber fabrics to be embedded in a placing cavity and placed in a chemical vapor deposition furnace together with a forming tool. The shaping frock of this technical scheme includes split type last mould and lower mould, conveniently places the fabric in the mould to can avoid last mould and lower mould separation through a plurality of strengthening frames after the compound die, set up the wedge between last mould and lower mould and strengthening frame moreover and can also make last mould and lower mould tightly pressfitting, avoid dislocation between last mould and the lower mould, thereby improve the shaping precision of fabric.
Further, in step S3, the calibration fixture includes a calibration base, a fastener, and a plurality of calibration fixing blocks arranged on the calibration base at intervals, the top of the calibration base is provided with a through slot, the bottom end of the calibration fixing block is embedded in the corresponding through slot and connected with the calibration base through the fastener, and the top end of the calibration fixing block is provided with a clamping slot for fixing the fiber fabric; the distance between the correction fixing blocks is 50-150 mm, and at least two through grooves are arranged.
The beneficial effects of adopting above-mentioned technical scheme are: tightening the fastener installs the correction fixed block in the correction base, and in the fibrous fabric placed clamping groove, owing to be provided with two at least logical grooves, consequently can two at least fibrous fabrics of correction simultaneously, this technical scheme's correction fixed block plays the effect of fixed fibrous fabric, can avoid tubular fibrous fabric to roll in the stove, and fibrous fabric and correction frock's area of contact is less this moment in addition, can also improve deposition efficiency.
Further, in the step S3, the fiber fabric is shaped and fixed again after being turned over for 180 degrees before being immersed in the chemical vapor phase in the furnace.
Further, in step S2, splicing forming tools with corresponding lengths according to the lengths of the fiber fabrics; step S3, splicing the correction tool with the corresponding length according to the length of the fiber fabric; the forming tool and the calibrating tool are spliced through the locating pin and the screw.
The beneficial effects of adopting above-mentioned technical scheme are: under the condition that the length of the fiber fabric is longer, the fiber fabric can be molded and shaped in a splicing mode, and the molding tool and the shaping tool matched with the length of the fiber fabric are spliced according to the length of the fiber fabric, so that the operation flexibility in the preparation process is improved.
Further, the vertical suspension method in step S4 is: the carbon ropes penetrate through the inner cavities of the fiber fabrics, the two ends of the carbon ropes are knotted, the carbon ropes are used for preventing the carbon ropes from being separated from the inner cavities of the fiber fabrics, the fiber fabrics are vertically hung in a chemical vapor deposition furnace, and the upper ends and the lower ends of the fiber fabrics fall off and are hung and deposited before each chemical vapor infiltration process.
Further, in step S1, the material of the fiber fabric is carbon cloth or silicon carbide cloth.
Further, in step S1, 1K, 3K or 6K carbon fibers are wound on the surface of the fiber fabric for fixation; in step S3, the 1K or 3K carbon fiber is used for fixing the fiber fabric in the calibration fixture.
The beneficial effects of adopting above-mentioned technical scheme are: because the fiber fabric is formed by winding, carbon fibers are wound on the surface of the fiber fabric wrapped with the metal inner core and the paper core for fixation, and the winding fiber fabric can be prevented from being scattered; in the process of correction, after the fiber fabric is placed in the correction tool, the carbon fiber is bound on the correction tool, so that the fiber fabric can be prevented from being separated from the correction tool.
Further, in step S2, after the carbon interface of the fiber fabric meets the process requirement, the metal inner core is used to slowly discharge the remaining paper core paper scraps.
Further, the matrix chemical vapor infiltration density of the fiber fabric in the step S2 is more than 1.2g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The density of the fiber fabric in the step S3 is more than 1.6g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The density of the fiber fabric in the step S4 is more than 2.3g/cm 3 。
The invention has the following beneficial effects:
(1) According to the invention, the fiber fabric is placed in the forming tool to prepare the carbon interface layer and the silicon carbide matrix, so that the fiber fabric is prevented from being distorted and deformed in the forming process, and the formed fiber fabric is placed in the sizing tool again to be subjected to sizing and is placed in a chemical vapor deposition furnace together with the fiber fabric for reprocessing.
(2) The invention adopts a suspension mode to suspend the fiber fabric in a chemical vapor deposition furnace, and the outer wall of the fiber fabric is not in direct contact with the outside, thereby preventing the fiber fabric from deformation in the preparation process, and the fiber fabric treated by the method has uniform wall thickness and straightness meeting the use requirement
(3) The forming tool comprises the split upper die and the split lower die, so that the fiber fabrics are conveniently placed in the dies, the upper die and the lower die can be prevented from being separated through the plurality of reinforcing frames after the dies are assembled, and the upper die and the lower die can be tightly pressed together by arranging the wedge-shaped blocks between the upper die and the lower die and between the upper die and the reinforcing frames, so that dislocation between the upper die and the lower die is avoided, and the forming precision of the fiber fabrics is improved.
Drawings
Fig. 1 is a schematic view of a structure of a fabric wrap of the present invention.
Fig. 2 is a schematic structural diagram of the forming tool of the present invention.
Fig. 3 is a schematic view of the structure of the placement cavity of the present invention.
Fig. 4 is a schematic structural diagram of the calibration fixture of the present invention.
Fig. 5 is a schematic structural view of the calibration block according to the present invention.
In the figure: 101-a metal core; 102-paper core; 103-a fibrous fabric; 2-forming a tool; 201-upper die; 202-a lower die; 203-arc grooves; 204-placing the cavity; 205-reinforcing frame; 206-graphite wedge blocks; 3-sizing tool; 301-calibrating a base; 302-a fastener; 303-calibrating the fixed block.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
A ceramic matrix composite slender thin-wall tube forming process comprises the following steps:
s1: referring to fig. 1, a paper core 102 is wrapped around a metal inner core 101, and then a fiber fabric 103 with a certain thickness is wrapped around the paper core 102;
the fiber fabric 103 is made of carbon cloth or silicon carbide cloth, and is wound on the outer wall of the paper core 102 in a winding manner. The surface of the fiber fabric 103 with the metal inner core 101 and the paper core 102 is wound with 1K, 3K or 6K carbon fiber for fixation, and the carbon fiber is wound on the surface of the fiber fabric 103 for fixation, so that the winding fiber fabric 103 can be prevented from being scattered.
S2: referring to fig. 2 and 3, a fiber fabric 103 wrapped with a metal inner core 101 and a paper core 102 is placed in a forming tool 2, then the metal inner core 101 is slowly drawn out, the fiber fabric 103 after mold assembly and the forming tool 2 are placed in a chemical vapor deposition furnace together for preparing a carbon interface layer, and after the carbon interface of the fiber fabric 103 meets the process requirements, the remaining paper core 102 and paper scraps are slowly discharged from the fiber fabric 103 by holding the metal inner core 101. Preparing silicon carbide matrix on the fiber fabric 103 after die assembly, wherein the matrix chemical vapor infiltration density of the fiber fabric 103 is more than 1.2g/cm 3 At this time, the mold is opened to take out the fiber cloth 103.
The forming tool 2 comprises an upper die 201 and a lower die 202, wherein the die clamping surfaces of the upper die 201 and the lower die 202 are respectively provided with an arc groove 203, the two arc grooves 203 form a placing cavity 204 for placing the fiber fabrics 103, and the placing cavity 204 can be provided with 1 or more according to the hearth size of a chemical weather deposition furnace; after the upper die 201 and the lower die 202 are clamped, a plurality of reinforcing frames 205 are sleeved, and graphite wedges 206 are respectively arranged between the reinforcing frames 205 and the outer walls of the upper die 201 and the lower die 202. The use process of the forming tool 2 comprises the following steps: the fiber fabric 103 is placed in the circular arc groove 203 of the lower die 202, two ends of the fiber fabric 103 extend to two ends of the circular arc groove 203, then the upper die 201 and the lower die 202 are clamped, the upper die 201 and the lower die 202 are sleeved in sequence through a plurality of reinforcing frames 205 after the clamping, at the moment, certain gaps exist between the top wall of the upper die 201 and the reinforcing frames 205, between the side wall of the upper die 201 and the reinforcing frames 205, and between the side wall of the lower die 202 and the reinforcing frames 205, graphite wedges 206 are placed at the gaps respectively, at the moment, the fiber fabric 103 is embedded in the placing cavity 204 and is placed in a chemical vapor deposition furnace together with the forming tool 2.
The forming tool 2 comprises the split upper die 201 and the split lower die 202, so that the fiber fabric 103 is conveniently placed in the die, the upper die 201 and the lower die 202 can be prevented from being separated through the plurality of reinforcing frames 205 after the die is assembled, and the upper die 201 and the lower die 202 can be tightly pressed together by arranging the wedge-shaped blocks between the upper die 201 and the lower die 202 and the reinforcing frames 205, so that dislocation between the upper die 201 and the lower die 202 is avoided, and the forming precision of the fiber fabric 103 is improved. The fiber fabric 103 is an elongated thin-wall tube, the metal inner core 101 has a certain supporting force, so that the fiber fabric 103 is formed into the thin-wall tube with uniform wall tube, the fiber fabric 103 is placed in the forming tool 2 for carbon interface layer preparation and silicon carbide matrix preparation, the contact area between the fiber fabric 103 and the forming tool 2 is large, the fiber fabric 103 is not easy to loose and deform, the forming tool 2 plays a role in fixing, and the fiber fabric 103 is prevented from being distorted and deformed in the forming process.
S3: referring to fig. 4 and 5, the formed fiber fabric 103 is placed in a calibration tool 3, 1K or 3K carbon fibers are used to fix the fiber fabric 103 in the calibration tool 3, the fiber fabric 103 is repeatedly fed into and discharged from a chemical vapor deposition furnace to prepare a silicon carbide matrix, and the fiber fabric 103 is turned over for 180 degrees and then is re-calibrated and fixed before each chemical vapor infiltration of the fiber fabric 103 into the furnace. To-be-fibrous web 103Density of more than 1.6g/cm 3 At this time, the fiber web 103 is taken out of the sizing tool 3.
The calibration fixture 3 comprises a calibration base 301, a fastener 302 and a plurality of calibration fixing blocks 303 which are arranged on the calibration base 301 at intervals, wherein the top of the calibration base 301 is provided with through grooves, and at least two through grooves are arranged according to the hearth size of the chemical vapor deposition furnace. The correction fixing blocks 303 are Y-shaped, the distance between the correction fixing blocks 303 is 50-150 mm, the bottom ends of the correction fixing blocks 303 are embedded in corresponding through grooves and are connected with the correction base 301 through fasteners 302, and clamping grooves for fixing the fiber fabrics 103 are formed in the top ends of the correction fixing blocks 303. The fastening pieces 302 are bolts, threaded holes matched with the fastening pieces 302 are formed in the side walls of the two sides of the correction base 301, the fastening pieces 302 are screwed down to install the correction fixing blocks 303 in the correction base 301, the fiber fabrics 103 are placed in clamping grooves, and the two ends of 1K or 3K carbon fibers are bound on the correction fixing blocks 303, and at least two through grooves are formed, so that at least more than two fiber fabrics 103 can be corrected simultaneously, the correction fixing blocks 303 play a role in fixing the fiber fabrics 103, and the tubular fiber fabrics 103 can be prevented from rolling in a furnace. The formed fiber fabric 103 has certain rigidity due to the increased density, and can be subjected to correction after being placed in the correction tool 3, and can be further subjected to retreatment by being placed in a chemical vapor deposition furnace together with the fiber fabric 103, and the deposition efficiency of the fiber fabric 103 is improved due to the reduction of the contact area between the fiber fabric 103 and the correction tool 3.
The length of the fiber fabric 103 can be realized by wrapping the metal inner core 101 and the paper core 102 with carbon cloth or silicon carbide cloth, and in step S2, splicing the forming tool 2 with the corresponding length according to the length of the fiber fabric 103; in step S3, the corresponding length of the calibration tool 3 is spliced according to the length of the fiber fabric 103. Under the longer condition of the length of the fiber fabric 103, the forming tool 2 and the correcting tool 3 which are matched with the length of the fiber fabric 103 can be formed and corrected in a splicing mode, and the forming tool 2 and the correcting tool 3 are spliced through the locating pin and the screw, so that the operation flexibility in the preparation process is improved.
S4: by vertical suspensionSuspending the fiber fabric 103 after the correction in a chemical vapor deposition furnace, repeatedly feeding and discharging the fiber fabric 103 into and from the chemical vapor deposition furnace to prepare a silicon carbide matrix, and waiting until the density of the fiber fabric 103 is more than 2.3g/cm 3 At this time, the fiber web 103 is taken out from the furnace and the fiber web 103 is subjected to subsequent processing for obtaining a hollow fiber web having high densification, good straightness, uniform density distribution, and high rigidity.
The vertical suspension method comprises the following steps: the two ends of the carbon rope are respectively knotted by using the carbon rope to penetrate through the inner cavity of the fiber fabric 103, so that the carbon rope is prevented from being separated from the inner cavity of the fiber fabric 103, the fiber fabric 103 is vertically suspended in a chemical vapor deposition furnace, and the upper end and the lower end of the fiber fabric 103 are suspended and deposited in a direction conversion mode before each chemical vapor infiltration into the furnace. The fiber fabric 103 after the molding and the calibration treatment is also required to be placed into a chemical vapor deposition furnace for treatment, and as the fiber fabric 103 has a certain length and is inevitably deformed under the action of stress in the preparation process, the fiber fabric 103 is suspended in the chemical vapor deposition furnace in a suspension mode, and the outer wall of the fiber fabric 103 is not in direct contact with a furnace body, so that the deformation of the fiber fabric 103 in the preparation process is prevented.
The fiber fabric 103 after molding and shaping treatment has better rigidity and straightness, at the moment, the fiber fabric 103 can be placed into a chemical vapor deposition furnace to continue densification treatment without adopting a vertical suspension method, and the fiber fabric 103 is inevitably deformed under the action of stress in the preparation process because the fiber fabric 103 has a certain length. The method solves the problems that the existing method can not realize the distortion and deformation of the thin-wall tube ceramic matrix composite fiber fabric 103 in the forming process of the super-length-diameter ratio, the core is deviated in the processing process, the wall thickness of the fiber fabric 103 is uneven, and the production and use requirements can not be met.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The forming process of the ceramic matrix composite slender thin-wall pipe is characterized by comprising the following steps of:
s1: wrapping a paper core (102) outside the metal inner core (101), and wrapping a fiber fabric (103) with a certain thickness outside the paper core (102);
s2: placing a fiber fabric (103) with a metal inner core (101) and a paper core (102) in a forming tool (2), slowly extracting the metal inner core (101), and then placing the forming tool (2) into a chemical vapor deposition furnace for sequentially preparing a carbon interface layer and a silicon carbide matrix for shaping the fiber fabric;
s3: placing the molded fiber fabric (103) into a calibration tool (3), and then repeatedly feeding the calibration tool (3) into and discharging from a chemical vapor deposition furnace to prepare a silicon carbide matrix, wherein the silicon carbide matrix is used for preventing the fiber fabric (103) from deforming in the chemical vapor deposition process;
s4: suspending the fiber fabric after the correction in a chemical vapor deposition furnace by adopting a vertical suspension method, and then repeatedly feeding the fiber fabric (103) into and discharging from the chemical vapor deposition furnace to prepare a silicon carbide matrix, so as to obtain a hollow fiber fabric with higher densification, better straightness, uniform density distribution and higher rigidity;
in step S2, the forming tool (2) includes an upper die (201) and a lower die (202), the die clamping surfaces of the upper die (201) and the lower die (202) are respectively provided with an arc groove (203), and the two arc grooves (203) form a placing cavity (204) for placing the fiber fabric (103); a plurality of reinforcing frames (205) are sleeved after the upper die (201) and the lower die (202) are clamped, and graphite wedge blocks (206) are respectively arranged between the reinforcing frames (205) and the outer walls of the upper die (201) and the lower die (202); the placing cavity (204) is provided with at least one;
in step S3, the calibration fixture (3) includes a calibration base (301), a fastener (302) and a plurality of calibration fixing blocks (303) arranged on the calibration base (301) at intervals, a through groove is formed in the top of the calibration base (301), the bottom end of the calibration fixing block (303) is embedded in the corresponding through groove and is connected with the calibration base (301) through the fastener (302), and a clamping groove for fixing the fiber fabric (103) is formed in the top end of the calibration fixing block (303); the distance between the correction fixing blocks (303) is 50-150 mm, and at least two through grooves are formed.
2. The process for forming an elongated thin-walled tube of ceramic matrix composite according to claim 1 wherein in step S3, the fiber web (103) is reshaped and fixed after being turned 180 ° before each chemical vapor infiltration of the fiber web (103) into the furnace.
3. The process for forming the ceramic matrix composite elongated thin-walled tube according to claim 1, wherein in the step S2, forming tools (2) with corresponding lengths are spliced according to the lengths of the fiber fabrics (103); in the step S3, splicing the calibration tool (3) with the corresponding length according to the length of the fiber fabric (103); the forming tool (2) and the correcting tool (3) are spliced through a locating pin and a screw.
4. The process for forming an elongated thin-walled tube of ceramic matrix composite according to claim 1, wherein the vertical suspension in step S4 is as follows: the carbon ropes penetrate through the inner cavity of the fiber fabric (103), two ends of the carbon ropes are knotted respectively, and the carbon ropes are used for preventing the carbon ropes from being separated from the inner cavity of the fiber fabric (103), so that the fiber fabric (103) is vertically hung in a chemical vapor deposition furnace, and the upper end and the lower end of the fiber fabric (103) are hung and deposited in a direction-changing manner before each chemical vapor infiltration.
5. The process for forming an elongated thin-walled tube of ceramic matrix composite according to claim 1, wherein in step S1, the material of the fiber fabric (103) is carbon cloth or silicon carbide cloth.
6. The process for forming an elongated thin-walled tube of ceramic matrix composite according to claim 1, wherein in step S1, 1K, 3K or 6K carbon fibers are wound around the surface of the fiber fabric (103) for fixation; in step S3, the fiber fabric (103) is fixed in the sizing tool (3) by using 1K or 3K carbon fibers.
7. The process for forming an elongated thin-walled tube of ceramic matrix composite according to claim 1, wherein in step S2, after the carbon interface of the fiber fabric (103) meets the process requirements, the remaining paper core (102) scraps are slowly discharged by using the metal inner core (101).
8. The process for forming an elongated thin-walled tube of ceramic matrix composite material according to claim 1, wherein in step S2 the matrix chemical vapor infiltration density of the fiber fabric (103) is greater than 1.2g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the In step S3, the density of the fibrous web (103) is greater than 1.6g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the In step S4, the density of the fiber fabric is greater than 2.3g/cm 3 。
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| CN112645716A (en) * | 2020-12-22 | 2021-04-13 | 西安鑫垚陶瓷复合材料有限公司 | Deposition sizing tool and method for ceramic matrix composite part |
| CN112661521A (en) * | 2020-12-22 | 2021-04-16 | 西安鑫垚陶瓷复合材料有限公司 | Deposition sizing tool and method for ceramic matrix composite part |
| CN113603495A (en) * | 2021-07-29 | 2021-11-05 | 西北工业大学 | Method for preparing ceramic matrix composite bolt and pin based on long rod-shaped prefabricated body structure |
| CN114057502A (en) * | 2021-11-25 | 2022-02-18 | 西安鑫垚陶瓷复合材料有限公司 | Preparation method of ceramic matrix composite material slender thin-wall pipe fitting, ceramic matrix composite material slender thin-wall pipe fitting based on preparation method and application |
| CN114714476A (en) * | 2022-03-23 | 2022-07-08 | 西安鑫垚陶瓷复合材料有限公司 | Preparation method of continuous fiber reinforced ceramic matrix composite U-shaped beam |
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