CN111592372A - Selective laser sintering molding device and method for ceramic matrix composite combined with fibrofelt - Google Patents
Selective laser sintering molding device and method for ceramic matrix composite combined with fibrofelt Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/49—Scanners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
- B22F12/63—Rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
- C04B35/575—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by pressure sintering
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a ceramic matrix composite material laser selective sintering forming device combined with a fiber felt, which comprises a rack, a paving system, a laser sintering forming system and a control unit, wherein the method comprises the steps of firstly, conducting layered slicing on a three-dimensional model of a part by using slicing software, then, guiding the three-dimensional model into an equipment control computer, then, controlling a matrix material spray head in the paving system to pave a matrix material on a fiber woven felt by equipment according to a set program, then, carrying out selective laser sintering and curing by the laser sintering system according to layered data, increasing laser power to cut off the profile of the fiber felt, and then, descending a layer thickness distance of a forming substrate; and stacking layer by layer to obtain a molded green body, and performing hot-pressing sintering to obtain a molded part. The invention adopts a fiber woven felt and plane paving material curing system, the types and the quantity of the matrix materials are not limited, the rapid molding of the continuous fiber reinforced composite material is realized, and the laser sintering molding green body is combined with heating and pressurizing to obtain a molding piece with high molding performance and precision.
Description
Technical Field
The invention relates to the technical field of additive manufacturing and forming of continuous fiber reinforced composite materials, in particular to a device and a method for selective laser sintering forming of a ceramic matrix composite material combined with a fiber mat.
Background
The continuous fiber reinforced polymer matrix composite and the continuous fiber reinforced ceramic matrix composite can realize great improvement of the performance of the composite, and are determined as the direction of the prior development of the structural material in the 21 st century.
The traditional preparation method of the continuous fiber reinforced composite material mainly comprises the methods of hot press molding of a mould, chemical vapor infiltration, chemical vapor impregnation and the like, and the molding methods can not prepare a part with a complex shape, and have low molding freedom and high cost; the appearance of additive manufacturing technology is expected to change the situation, the additive manufacturing technology aiming at the continuous fiber reinforced composite material is mainly focused on the continuous fiber reinforced polymer composite material at present, the forming method mainly comprises the steps of melting, blending and extruding continuous fiber wires and polymer matrix materials, and the formed part has obvious anisotropy of mechanical properties and low forming speed.
The 2D knitted body made of the continuous fibers has the X-Y orthogonal characteristic, the 2D knitted body is used as a consumable material for additive manufacturing, the forming time is greatly shortened, and the prepared composite material is excellent in mechanical property.
Disclosure of Invention
The invention aims to provide a device and a method for selective laser sintering forming of a ceramic matrix composite combined with a fiber felt, which are used for preparing a continuous fiber reinforced composite part by an additive manufacturing technology, wherein continuous fibers in a matrix are orthogonal to each other, the applicable types of the matrix and fiber materials are not limited, and the device has the characteristics of simple equipment, high forming speed and the like.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a selective laser sintering molding device for ceramic matrix composites combined with fiber mats comprises a rack, a material spreading system, a laser sintering molding system and a control unit;
the spreading system comprises a driving roller, a driven roller, a tension rod, a base material box, a base material spray head, a sliding block, an X guide rail and a Y guide rail; the driving roller and the driven roller are respectively arranged at the left end and the right end of the device, a 2D fiber braided body is wound between the driving roller and the driven roller, and the 2D fiber braided body is tensioned and kept horizontal through tensioning rods at the two ends; y guide rails in the horizontal front-back direction are erected above the driving roller and the driven roller respectively, X guide rails in the horizontal left-right direction are erected on the Y guide rails, the X guide rails are connected with the Y guide rails on two sides through adapter plates, a sliding block capable of performing linear reciprocating motion is installed on the X guide rails, a base material box and a base material nozzle are installed on the sliding block, and the base material nozzle is connected with the base material box;
the laser sintering forming system comprises a laser, a galvanometer, a forming base plate, a forming cylinder and a Z-axis lifting mechanism, wherein the forming cylinder is arranged below the material laying system, the Z-axis lifting mechanism penetrates into the forming cylinder from the lower part, the upper end of the Z-axis lifting mechanism is connected with the forming base plate, and the forming base plate can do Z-axis up-and-down reciprocating motion in the forming cylinder along with the Z-axis lifting mechanism; the laser and the vibrating mirror are arranged right above the forming substrate, and the center of the vibrating mirror is aligned with the center of the forming substrate.
The driving roller, the driven roller, the tensioning rod, the Y guide rail and the forming cylinder are all installed on the rack, and the laser and the galvanometer are installed on the X guide rail.
And the control unit controls the actions of the driving roller, the X guide rail, the Y guide rail, the Z-axis lifting mechanism, the base material spray head, the laser and the vibrating mirror through a control circuit.
When the forming substrate returns to zero, the upper surface of the forming cylinder and the upper surface of the forming substrate are flush with the 2D fiber woven body, and the 2D fiber woven body can cling to the upper surface of the forming substrate 12 to reciprocate on a horizontal plane.
The laser has adjustable light source power, and the light source power range is 100-2000W.
A selective laser sintering forming method of a ceramic matrix composite combined with a fiber felt comprises the following steps:
1) importing a three-dimensional model file of a part into a control unit, and setting slicing parameters in the control unit according to the type of a material to be printed and the forming precision to obtain a control instruction of equipment;
2) winding two ends of the 2D fiber braided body on the driving roller and the driven roller respectively, and pouring the base material into the base material box;
3) the control unit firstly returns the forming substrate to zero, and then the base material spray head lays base materials on the 2D fiber woven body covered on the forming substrate according to the slicing parameters;
4) starting printing, enabling a laser and a galvanometer to work in a matching mode, selectively sintering a base material according to a layered pattern, and sintering the base material and the 2D fiber woven body together;
5) the laser power is increased by the laser, and after the 2D fiber woven body is cut off according to the outline shape of the layered pattern, the forming substrate is lowered by a layer thickness distance;
6) the driving roller rotates clockwise to enable the 2D fiber woven body to move horizontally along the upper plane of the forming substrate, and the finished 2D fiber woven body is moved to the upper surface of the forming substrate;
7) repeating the operations of the steps 2) to 6) to finish the printing and forming of the 2D fiber woven body reinforced composite material green body;
8) carrying out post-treatment: and carrying out hot-pressing sintering on the molded green body to obtain a relatively compact 2D fiber braided body reinforced composite material part.
The slice parameters described in step 1) have a layer thickness of 200-400 um.
The 2D fiber braided body in the step 2) is a carbon fiber, silicon carbide fiber, alumina fiber or glass fiber 2D braided body.
The base material in the step 2) is a polymer material, a metal material, a ceramic material or a composite of the polymer material, the metal material and the ceramic material.
The heating temperature of the hot-pressing sintering in the step 8) is designed according to different base materials, when the base material is a polymer material, the heating temperature is a polymer melting point, and when the base material is a ceramic material, the heating temperature is not lower than the sintering densification temperature of the ceramic material.
Compared with the prior art, the invention has the beneficial effects that:
1) the ceramic matrix composite laser selective sintering forming method combined with the fiber felt is based on 2D fiber woven body materials to perform printing forming on green bodies, and greatly improves forming efficiency from 2D to 3D;
2) the formed part prepared by the method and the equipment has high compactness, and the continuous fibers in the formed part are orthogonally arranged and have excellent mechanical property;
3) the invention has wide variety of fibers and matrix materials, and fills the gap of the current continuous fiber reinforced ceramic material 3D printing technology.
Drawings
FIG. 1 is a schematic diagram of a structure of a special device for preparing a fiber woven body reinforced composite material.
Fig. 2 is a schematic diagram of the structure of the conveying part of the 2D fiber woven body.
FIG. 3 is a schematic view of the process of preparing a fiber braid reinforced composite layer by lamination and addition.
Fig. 4 is a process flow diagram of a preparation method provided by the present invention.
In the figure: 1-a laser; 2-a galvanometer; 3-a matrix material magazine; 4-a slide block; 5-a matrix material spray head; 6-2D fiber braid; 7-Y guide rails; 8-a tension rod; 9-driving roller; 10-a forming cylinder; 11-Z axis lifting mechanism; 12-forming a substrate; 13-a driven roller; 14-X slide rail.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The following examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic structural diagram of a device dedicated to additive manufacturing of a 2D fiber woven body reinforced composite material, which includes a frame, a material spreading system, a laser sintering molding system, and a control unit.
The material spreading system comprises a driving roller 9, a driven roller 13, a tension rod 8, a base material box 3, a base material spray head 5, a sliding block 4, an X guide rail 14 and a Y guide rail 7; the driving roller 9 and the driven roller 13 are respectively arranged at two ends of the device, and two ends of the 2D fiber weaving body 6 are respectively wound on the driving roller 9 and the driven roller 13, tensioned by the tensioning rod 8 and kept horizontal; the base material box 3 and the base material nozzle 5 are arranged on a sliding block 4, the sliding block 4 is arranged on an X guide rail 14 and can do linear reciprocating motion, and the X guide rail 14 is arranged on a Y guide rail 7 through an adapter plate.
The laser sintering forming system comprises a laser 1, a galvanometer 2, a forming substrate 12, a forming cylinder 10 and a Z-axis lifting mechanism 11; the forming substrate 12 is fixed on the Z-axis lifting mechanism 11 and can do Z-axis up-and-down reciprocating motion in the forming cylinder 10 along with the Z-axis lifting mechanism 11; the laser 1 and the galvanometer 2 are positioned right above the molding substrate 12, and the center of the galvanometer 2 is aligned with the center of the molding substrate 12.
And the driving roller 9, the driven roller 13, the tension rod 8, the Y guide rail 7 and the forming cylinder 10 are all arranged on the frame. The laser and the galvanometer are arranged on an X guide rail.
The control unit controls the actions of the driving roller 9, the X guide rail 14, the Y guide rail 7, the Z-axis lifting mechanism 11, the base material spray head 5, the laser 1 and the galvanometer 2 through control circuits.
When the forming substrate 12 returns to zero, the upper surface of the forming cylinder 10, the upper surface of the forming substrate 12 and the 2D fiber woven body 6 are flush, and at the moment, the 2D fiber woven body 6 can cling to the upper surface of the forming substrate 12 to reciprocate on a horizontal plane.
Fig. 4 is a process flow diagram of the preparation method provided by the present invention, and the specific preparation method comprises the following steps:
1) importing a three-dimensional model file of a part into a control unit, setting slicing parameters in the control unit according to the type of a material to be printed and the molding precision, wherein the thickness of a layer is 200-400 mu m, and then slicing the model to obtain a control instruction of equipment;
2) winding two ends of a 2D fiber braiding body 6 on a driving roller 9 and a driven roller 13 respectively, pouring a base material into a base material box 3, wherein the 2D fiber braiding body 6 is a carbon fiber, silicon carbide fiber, alumina fiber or glass fiber 2D braiding body, and the base material is a polymer material, a metal material, a ceramic material or a compound of the polymer material, the metal material and the ceramic material.
3) The control unit firstly returns the forming substrate 12 to zero, and then the base material spray head 5 lays base materials on the 2D fiber woven body 6 covered on the forming substrate 12 according to the slicing parameters;
4) starting printing, wherein the laser 1 and the galvanometer 2 work in a matching way, selectively sintering a base material according to a layered pattern, and sintering the base material and the 2D fiber woven body together;
5) the laser 1 increases the laser power, and the forming substrate 12 descends by a layer thickness distance after the 2D fiber woven body 6 is cut off according to the outline shape of the layered pattern;
6) the driving roller 9 rotates clockwise to enable the 2D fiber woven body to horizontally move along the upper plane of the forming substrate 12, and the finished 2D fiber woven body is moved to the upper surface of the forming substrate 12;
7) repeating the operations of the steps 2) to 6) to finish the printing and forming of the 2D fiber woven body reinforced composite material green body;
8) carrying out post-treatment: and carrying out hot-pressing sintering on the molded green body to obtain a relatively compact 2D fiber braided body reinforced composite material part. The heating temperature of the hot-pressing sintering post-treatment method is different according to different base materials, when the base materials are polymer materials, the heating temperature is a polymer melting point, and when the base materials are ceramic materials, the heating temperature is not lower than the sintering densification temperature of the ceramic materials.
Specifically, in the embodiment of the invention, modeling is carried out in three-dimensional software such as SolidWorks/ProE and the like, the modeling is stored as an STL format file and is imported into slicing software, the layering thickness is set to be 200um, the scanning speed is set to be 500mm/s, and the slicing software is imported into an equipment control computer after obtaining a machine control instruction; winding two ends of a carbon fiber woven body on a driving roller and a driven roller respectively, pouring silicon carbide slurry doped with PVA binder into a base material box, controlling a forming substrate to return to zero by a control unit, laying base material on the carbon fiber woven body according to a layered pattern by a base material spray head, sintering the base material by a laser in a 200W power selection area after laying is completed, fully bonding silicon carbide particles and the carbon fiber woven body, adjusting the power of the laser to 2000W, cutting the fiber woven body along layered contour data, lowering the forming substrate by 200um, completing single-layer curing forming, repeating the steps in the above way, and accumulating layer by layer to prepare a carbon fiber woven body reinforced silicon carbide ceramic green body; and (3) carrying out hot-pressing sintering on the molded green body under the conditions of no oxygen, 1800 ℃ and 20Mpa to obtain the relatively compact carbon fiber woven body reinforced silicon carbide ceramic.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a ceramic matrix composite laser selective sintering forming device who combines fibrofelt which characterized in that: the laser sintering forming machine comprises a machine frame, a material spreading system, a laser sintering forming system and a control unit;
the spreading system comprises a driving roller, a driven roller, a tension rod, a base material box, a base material spray head, a sliding block, an X guide rail and a Y guide rail; the driving roller and the driven roller are respectively arranged at the left end and the right end of the device, a 2D fiber braided body is wound between the driving roller and the driven roller, and the 2D fiber braided body is tensioned and kept horizontal through tensioning rods at the two ends; y guide rails in the horizontal front-back direction are erected above the driving roller and the driven roller respectively, X guide rails in the horizontal left-right direction are erected on the Y guide rails, the X guide rails are connected with the Y guide rails on two sides through adapter plates, a sliding block capable of performing linear reciprocating motion is installed on the X guide rails, a base material box and a base material nozzle are installed on the sliding block, and the base material nozzle is connected with the base material box;
the laser sintering forming system comprises a laser, a galvanometer, a forming base plate, a forming cylinder and a Z-axis lifting mechanism, wherein the forming cylinder is arranged below the material laying system, the Z-axis lifting mechanism penetrates into the forming cylinder from the lower part, the upper end of the Z-axis lifting mechanism is connected with the forming base plate, and the forming base plate can do Z-axis up-and-down reciprocating motion in the forming cylinder along with the Z-axis lifting mechanism; the laser and the vibrating mirror are arranged right above the forming substrate, and the center of the vibrating mirror is aligned with the center of the forming substrate.
2. The fiber mat bonded ceramic matrix composite laser selective sintering forming apparatus as claimed in claim 1, wherein: the driving roller, the driven roller, the tensioning rod, the Y guide rail and the forming cylinder are all installed on the rack, and the laser and the galvanometer are installed on the X guide rail.
3. The fiber mat bonded ceramic matrix composite laser selective sintering forming apparatus as claimed in claim 1, wherein: and the control unit controls the actions of the driving roller, the X guide rail, the Y guide rail, the Z-axis lifting mechanism, the base material spray head, the laser and the vibrating mirror through a control circuit.
4. The fiber mat bonded ceramic matrix composite laser selective sintering forming apparatus as claimed in claim 1, wherein: when the forming substrate returns to zero, the upper surface of the forming cylinder and the upper surface of the forming substrate are flush with the 2D fiber woven body, and the 2D fiber woven body can cling to the upper surface of the forming substrate 12 to reciprocate on a horizontal plane.
5. The fiber mat bonded ceramic matrix composite laser selective sintering forming apparatus as claimed in claim 1, wherein: the laser has adjustable light source power, and the light source power range is 100-2000W.
6. A selective laser sintering forming method of a ceramic matrix composite combined with a fiber felt is characterized by comprising the following steps: use of the device according to any of claims 1-5, comprising the steps of:
1) importing a three-dimensional model file of a part into a control unit, and setting slicing parameters in the control unit according to the type of a material to be printed and the forming precision to obtain a control instruction of equipment;
2) winding two ends of the 2D fiber braided body on the driving roller and the driven roller respectively, and pouring the base material into the base material box;
3) the control unit firstly returns the forming substrate to zero, and then the base material spray head lays base materials on the 2D fiber woven body covered on the forming substrate according to the slicing parameters;
4) starting printing, enabling a laser and a galvanometer to work in a matching mode, selectively sintering a base material according to a layered pattern, and sintering the base material and the 2D fiber woven body together;
5) the laser power is increased by the laser, and after the 2D fiber woven body is cut off according to the outline shape of the layered pattern, the forming substrate is lowered by a layer thickness distance;
6) the driving roller rotates clockwise to enable the 2D fiber woven body to move horizontally along the upper plane of the forming substrate, and the finished 2D fiber woven body is moved to the upper surface of the forming substrate;
7) repeating the operations of the steps 2) to 6) to finish the printing and forming of the 2D fiber woven body reinforced composite material green body;
8) carrying out post-treatment: and carrying out hot-pressing sintering on the molded green body to obtain a relatively compact 2D fiber braided body reinforced composite material part.
7. The selective laser sintering method for ceramic matrix composites with fiber mats according to claim 6, wherein: the slice parameters described in step 1) have a layer thickness of 200-400 um.
8. The selective laser sintering method for ceramic matrix composites with fiber mats according to claim 1, wherein: the 2D fiber braided body in the step 2) is a carbon fiber, silicon carbide fiber, alumina fiber or glass fiber 2D braided body.
9. The selective laser sintering method for ceramic matrix composites with fiber mats according to claim 1, wherein: the base material in the step 2) is a polymer material, a metal material, a ceramic material or a composite of the polymer material, the metal material and the ceramic material.
10. The selective laser sintering method for ceramic matrix composites with fiber mats according to claim 1, wherein: the heating temperature of the hot-pressing sintering in the step 8) is designed according to different base materials, when the base material is a polymer material, the heating temperature is a polymer melting point, and when the base material is a ceramic material, the heating temperature is not lower than the sintering densification temperature of the ceramic material.
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| CN202010639539.7A CN111592372A (en) | 2020-07-06 | 2020-07-06 | Selective laser sintering molding device and method for ceramic matrix composite combined with fibrofelt |
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| CN202010639539.7A CN111592372A (en) | 2020-07-06 | 2020-07-06 | Selective laser sintering molding device and method for ceramic matrix composite combined with fibrofelt |
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Cited By (2)
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|---|---|---|---|---|
| CN113386349A (en) * | 2021-06-16 | 2021-09-14 | 西南交通大学 | 3D printing method of carbon fiber reinforced resin-based plate |
| CN114773066A (en) * | 2022-05-19 | 2022-07-22 | 醴陵市凯德特种陶瓷有限公司 | Manufacturing method of toughened silicon carbide ceramic kiln furniture flat plate |
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