CN117700229A - Manufacturing method of reaction sintering silicon carbide composite ceramic structure and ceramic structure - Google Patents
Manufacturing method of reaction sintering silicon carbide composite ceramic structure and ceramic structure Download PDFInfo
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- CN117700229A CN117700229A CN202311681207.5A CN202311681207A CN117700229A CN 117700229 A CN117700229 A CN 117700229A CN 202311681207 A CN202311681207 A CN 202311681207A CN 117700229 A CN117700229 A CN 117700229A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 233
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- 238000005245 sintering Methods 0.000 title claims abstract description 49
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 64
- 239000000654 additive Substances 0.000 claims abstract description 42
- 230000000996 additive effect Effects 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 238000005475 siliconizing Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 238000010309 melting process Methods 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 238000000149 argon plasma sintering Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 239000006260 foam Substances 0.000 abstract description 4
- 230000002028 premature Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000007822 coupling agent Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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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
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- Ceramic Products (AREA)
Abstract
The invention discloses a manufacturing method of a reaction sintering silicon carbide composite ceramic structure and the ceramic structure, which comprises the following steps: producing a ceramic body by an additive manufacturing method, and enabling the inner wall and/or the outer wall of the ceramic body to form a fixed groove; sintering the ceramic blank; the ceramic reinforcing block is embedded into the fixing groove. The ceramic blank is produced in an additive manufacturing mode, the ceramic blank with a complex shape and structure can be manufactured, and a required fixing groove can be formed at a required position in the additive manufacturing process by controlling a modeling model of the additive manufacturing, so that the fixing groove is not required to be processed on the ceramic structure, and the fixing groove is not required to be formed in a lost foam mode; through carrying out the sintering to ceramic body for ceramic body solidification to form required ceramic structure, through embedding the fixed slot with ceramic reinforcing block, ceramic reinforcing block can strengthen ceramic structure's local abrasion resistance, slows down ceramic structure's local wearing and tearing, avoids ceramic structure because wearing and tearing and premature failure.
Description
Technical Field
The invention relates to the technical field of ceramic structures, in particular to a manufacturing method of a reaction sintering silicon carbide composite ceramic structure and the ceramic structure.
Background
In order to enhance the wear resistance of the ceramic material, a groove is generally formed in a part of the ceramic material, and then a wear-resistant member is embedded in the groove to enhance the wear resistance of the part of the ceramic material.
It is currently common practice to form grooves in ceramic articles after they are formed, or during the manufacture of green bodies of ceramic articles by means of lost foam or the like.
Because the hardness of the ceramic structure is relatively high, grooves are processed on the formed ceramic product, and the grooves are easy to process; for the ceramic structure with complex structure, if the groove is formed by adopting the vanishing film mode, the layout position of the vanishing film has higher difficulty, and the groove cannot be formed on the ceramic structure conveniently.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method for manufacturing a reaction-sintered silicon carbide composite ceramic structure and a ceramic structure, which solve the technical problem that the grooves cannot be formed on the ceramic structure conveniently in the prior art.
In order to achieve the technical aim, the technical scheme of the invention provides a manufacturing method of a reaction sintering silicon carbide composite ceramic structure, which comprises the following steps:
producing a ceramic body by an additive manufacturing method, and enabling the inner wall and/or the outer wall of the ceramic body to form a fixed groove;
carrying out high-temperature siliconizing sintering on the ceramic blank;
and embedding the ceramic reinforcing block into the fixing groove of the ceramic body.
In one embodiment, the ceramic reinforcing block is embedded in the fixing groove of the ceramic blank body in the step, and the ceramic reinforcing block is embedded in the fixing groove of the sintered ceramic blank body;
or embedding the ceramic reinforcing block into the fixing groove of the ceramic blank before sintering, and bonding the ceramic reinforcing block and the ceramic blank by adopting an adhesive.
In one embodiment, the ceramic body is produced by an additive manufacturing method in a step, and the inner wall and/or the outer wall of the ceramic body form a fixed groove, wherein the components of raw materials used in the additive manufacturing are silicon carbide micro powder, carbon powder, resin and additives.
In one embodiment, the average particle size of the particles in the feedstock is from 20 μm to 500 μm.
In one embodiment, the additive manufacturing process is a laser selective melting process, the adopted laser sintering power is 20-100W, and the layering thickness is 0.05-0.5 mm.
In one embodiment, the components of the additive include a sintering aid.
In one embodiment, before sintering the ceramic body in the step, the method further comprises the steps of:
performing organic carburization on the ceramic blank;
and taking out the ceramic blank, drying and solidifying.
In one embodiment, in the step of high-temperature siliconizing and sintering the ceramic blank, the dried ceramic blank is placed in a sintering furnace, the temperature is raised at the speed of 20-80 ℃/h, the temperature is raised to 1500-1800 ℃, the heat preservation is continued for 1.5-3h, and the ceramic blank is naturally cooled to the room temperature.
In one embodiment, before the step of embedding the ceramic reinforcing block into the fixing groove of the ceramic body before sintering, the method further comprises the steps of:
and coating the adhesive on the inner wall of the fixing groove and/or the outer wall of the ceramic reinforcing block.
In one embodiment, after sintering the ceramic body in the step, the method further comprises the steps of:
and coating the adhesive on the inner wall of the fixing groove and/or the outer wall of the ceramic reinforcing block.
In one embodiment, the composition of the adhesive is:
wherein the ratio of the silicon carbide powder to the phenolic resin is 2:1.
The invention also relates to a ceramic structure, which is manufactured by adopting the manufacturing method of the reaction sintering silicon carbide composite ceramic structure;
the reaction-sintered silicon carbide composite ceramic structure comprises:
a ceramic body formed with a fixing groove; and
The ceramic reinforcing block is embedded in the fixing groove.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the ceramic blank body is produced in an additive manufacturing mode, the ceramic blank body with a complex shape and structure can be manufactured, and a required fixing groove can be formed at a required position in the additive manufacturing process by controlling a modeling model of additive manufacturing, so that the fixing groove is not required to be processed on the ceramic structure, and the fixing groove is not required to be formed in a lost foam mode; through carrying out the sintering to ceramic body for ceramic body solidification to form required ceramic structure, through embedding the fixed slot with ceramic reinforcing block, ceramic reinforcing block can strengthen ceramic structure's local abrasion resistance, slows down ceramic structure's local wearing and tearing, avoids ceramic structure because wearing and tearing and premature failure. Moreover, when the complex-shape ceramic product is manufactured by adopting the traditional additive manufacturing mode, the performance of the product is reduced relative to that of a conventional product, and in the application, the performance of the ceramic blank manufactured by adopting the additive manufacturing mode can be enhanced by embedding the ceramic reinforcing blocks on the ceramic blank by manufacturing the ceramic blank by adopting the additive manufacturing mode.
Drawings
FIG. 1 is a process flow diagram of a method for fabricating a reaction-sintered silicon carbide composite ceramic structure according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a ceramic structure according to an embodiment of the invention;
fig. 3 is a schematic structural view of a ceramic structure according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
As shown in fig. 1, the invention provides a method for manufacturing a reaction sintering silicon carbide composite ceramic structure, which comprises the following steps:
producing a ceramic body by an additive manufacturing method, and enabling the inner wall and/or the outer wall of the ceramic body to form a fixed groove;
high-temperature siliconizing and sintering are carried out on the ceramic blank;
the ceramic reinforcing block 2 is embedded into the fixing groove.
According to the invention, the ceramic blank body is produced in an additive manufacturing mode, the ceramic blank body with a complex shape and structure can be manufactured, and a required fixing groove can be formed at a required position in the additive manufacturing process by controlling a modeling model of additive manufacturing, so that the fixing groove is not required to be processed on the ceramic structure, and the fixing groove is not required to be formed in a lost foam mode; through carrying out high temperature siliconizing sintering to the ceramic body for the ceramic body solidification to form required ceramic structure, through embedding ceramic reinforcing piece 2 fixed slot, ceramic reinforcing piece 2 can strengthen ceramic structure's local abrasion resistance, impact strength and corrosion resistance, slows down ceramic structure's local wearing and tearing, avoids ceramic structure to lose efficacy because of wearing and tearing prematurely. Moreover, when the ceramic product with the complex shape is manufactured by adopting the traditional additive manufacturing mode, the performance of the product is reduced compared with that of a conventional product, and in the application, the ceramic blank body is manufactured by adopting the additive manufacturing mode, and the ceramic reinforcing blocks 2 are embedded on the ceramic blank body, so that the performance of the ceramic blank body manufactured by adopting the additive manufacturing mode can be reinforced.
It should be appreciated that the ceramic reinforcing block 2 may be a pressureless sintered silicon carbide ceramic, a reaction sintered silicon carbide ceramic, a recrystallized silicon carbide ceramic, etc., and that the ceramic reinforcing block 2 is stronger than the sintered ceramic body, at least in any one of wear resistance, impact resistance, corrosion resistance, etc.
It should be understood that the wear resistance of the ceramic reinforcing block 2 is greater than or equal to the wear resistance of the sintered ceramic body, and when the wear resistance of the ceramic reinforcing block 2 is equal to the wear resistance of the ceramic body, the wear resistance of the ceramic structure can be slowed down by replacing the ceramic reinforcing block 2; when the wear resistance of the ceramic reinforcing block 2 is greater than that of the ceramic blank body, the ceramic reinforcing block 2 with better wear resistance can effectively slow down the wear of the ceramic structure.
In one embodiment, the ceramic reinforcing block 2 is embedded in the fixing groove in the step, and the ceramic reinforcing block 2 is embedded in the fixing groove of the sintered ceramic blank;
or embedding the ceramic reinforcing block 2 into a fixed groove of the ceramic blank before sintering, and bonding the ceramic reinforcing block 2 and the ceramic blank by adopting an adhesive.
At least two embedding schemes exist for the ceramic reinforcing block 2, in the first step, after the ceramic blank is produced in an additive manufacturing mode, the ceramic reinforcing block 2 is embedded into the ceramic blank formed by the additive manufacturing, and the ceramic reinforcing block 2 and the ceramic blank are sintered together at high temperature in a siliconizing mode, so that the ceramic reinforcing block 2 and the ceramic blank are sintered together for molding; the second scheme is that the ceramic blank manufactured by the additive manufacturing mode is singly subjected to high-temperature siliconizing sintering, and then an adhesive is provided to bond the ceramic reinforcing block 2 on the sintered ceramic blank.
And embedding the ceramic reinforcing block 2 into a fixed groove of the ceramic blank body before sintering, and bonding the ceramic blank body and the ceramic reinforcing block 2 by adopting the matching of silicon carbide powder and resin with high carbon residue.
In one embodiment, the ceramic body is produced in a step by an additive manufacturing method, and the components of raw materials used in the additive manufacturing are silicon carbide micro powder, carbon powder, resin and additives in a fixed groove formed on the inner wall and/or the outer wall of the ceramic body.
When the silicon carbide micro powder is sintered, silicon carbide ceramics can be formed, and the bonding strength of the ceramics after laser sintering can be enhanced through the resin and the additive in the raw materials, so that the bonding of different materials is promoted. It should be understood that the resin may be an epoxy resin and the additive may be a sintering aid.
It should be understood that the process used in additive manufacturing may be a laser selective melting process or a material extrusion 3D printing process, where the two manufacturing processes may differ in the raw materials, the raw materials are powdered and free of water when the laser selective melting process is selected, and the raw materials are pasty and contain a certain amount of water when the material extrusion 3D printing process is selected.
In one embodiment, the average particle size of the particles in the feedstock is from 20 μm to 500 μm.
By controlling the particle size of the particles in the raw materials, the powder with smaller particle size is favorable for filling into gaps formed by the large-particle raw materials, so that the bulk density of the powder is improved, the pores of the part or product formed by melting the selected laser area are reduced, and the surface quality and strength of the part or product are improved; if the fine powder particles are too many, spheroidization easily occurs in the melting or sintering process, which is rather unfavorable for the compaction and uniformity of the powder layer.
In one embodiment, the additive manufacturing process is a laser selective melting process, the adopted laser sintering power is 20-100W, and the layering thickness is 0.05-0.5 mm.
The raw materials can be subjected to primary sintering solidification through a laser selective melting process, so that the ceramic body after primary sintering solidification has certain structural strength.
In one embodiment, the components of the additive include a sintering aid.
By arranging the sintering aid, in the process of sintering the ceramic blank, the sintering aid can further promote the combination of different materials in the ceramic blank, and can eliminate layering in the height direction caused by the high-temperature adhesive, so that the ceramic material is integrally bonded.
In one embodiment, the composition of the additive further comprises a high temperature adhesive.
Through setting up high temperature adhesive, through the in-process that laser selective melting, high temperature adhesive is used for bonding laser melting's material, can strengthen the structural strength of ceramic body after the laser selective melting to the in-process that laser selective melting, can promote the combination between the material of the coplanar of interval around the spraying.
In one embodiment, before the step of high temperature siliconizing sintering the ceramic body, the method further comprises the steps of:
performing organic carburization on the ceramic blank;
and taking out the ceramic blank, baking, and solidifying.
Through the treatment, the ceramic body is subjected to organic carburization, so that the carbon content is increased, and the strength of the ceramic structure is further improved.
In one embodiment, in the step of high-temperature siliconizing and sintering the ceramic blank, the dried ceramic blank is placed in a sintering furnace, heated to 1500-1800 ℃ at a speed of 20-80 ℃/h, kept for 1.5-3 hours, and naturally cooled to room temperature.
In one embodiment, before the step of high temperature siliconizing sintering the ceramic body, the method further comprises the steps of:
cleaning attachments and/or protrusions on the inner wall of the fixing groove of the ceramic body.
The mode through the additive manufacturing produces ceramic body, can lead to the inner wall of the fixed slot of ceramic body to produce attachment or protrusion, if do not clear up these attachment or protrusion, can lead to the size of fixed slot inconsistent with the size of predetermineeing, lead to ceramic reinforcing piece 2 unable embedded fixed slot, or the inner wall of ceramic reinforcing piece 2 unable effective laminating fixed slot, in this embodiment, through clearing up these attachment or protrusion, can avoid these attachment or protrusion to influence ceramic reinforcing piece 2 embedded fixed slot to avoid these attachment or protrusion to influence the inner wall of ceramic reinforcing piece 2 laminating fixed slot.
In one embodiment, before the step of embedding the ceramic reinforcing block 2 into the fixing groove of the ceramic body before sintering, the method further comprises the steps of:
the adhesive is applied to the inner wall of the fixing groove and/or the outer wall of the ceramic reinforcing block 2.
By arranging the adhesive, the adhesive adheres the ceramic reinforcing block 2 to the inner wall of the fixing groove, so that the ceramic reinforcing block 2 is fixedly embedded in the fixing groove of the ceramic blank.
In one embodiment, the composition of the adhesive is:
wherein, the ratio of the silicon carbide powder to the phenolic resin is 2:1.
By arranging the phenolic resin, the phenolic resin plays a role in bonding, and after being cured at a high temperature, the residual carbon is high, so that the carbon content in the silicon carbide ceramic can be improved, and the strength is increased.
The accelerator is arranged and used for accelerating the curing of the adhesive, so that the curing time is shortened; the promoter may be 6% cobalt naphthenate.
The coupling agent is arranged and used for reinforcing the connection between the ceramic reinforcing block 2 and the ceramic; the coupling agent may be a silane coupling agent, and specifically may be KH-570.
By arranging the defoaming agent, the defoaming agent can avoid a large number of bubbles in the cured adhesive and avoid the bubbles from influencing the bonding strength; the defoamer may be a stearic acid modified polyether defoamer.
By arranging the leveling agent, the adhesive can be uniformly coated on the inner wall of the fixed groove and/or the outer wall of the ceramic reinforcing block 2 when coated on the inner wall of the fixed groove and/or the outer wall of the ceramic reinforcing block 2; the leveling agent may be a modified polysiloxane.
The curing agent is capable of reacting with the phenolic resin to form a stable chemical bond, thereby curing the phenolic resin. The curing agent may be m-phenylenediamine.
As shown in fig. 2, the present invention further relates to a ceramic structure, which is manufactured by the method for manufacturing the reaction sintering silicon carbide composite ceramic structure; the ceramic structure comprises a ceramic body 1 and a ceramic reinforcing block 2, wherein a fixing groove is formed in the ceramic body 1; the ceramic reinforcing block 2 is embedded in the fixed groove.
Through embedding ceramic reinforcing block 2 fixed slot, ceramic reinforcing block 2 can strengthen the local abrasion resistance, impact strength and the corrosion resistance of ceramic structure, slows down ceramic structure's local wearing and tearing, avoids ceramic structure to lose efficacy because of wearing and tearing prematurely.
As shown in fig. 3, in one embodiment, the reaction-sintered silicon carbide composite ceramic structure further includes an adhesive layer 3, where the adhesive layer 3 is formed by curing the adhesive.
Example 1
It should be understood that this embodiment is the same as the description of the above specific embodiment, and the description is not repeated except that:
example two
It should be understood that this embodiment is the same as the above description, and the description is not repeated except that:
example III
It should be understood that this embodiment is the same as the above description, and the description is not repeated except that:
example IV
It should be understood that this embodiment is the same as the above description, and the description is not repeated except that:
example five
It should be understood that this embodiment is the same as the above description, and the description is not repeated except that:
example six
It should be understood that this embodiment is the same as the above description, and the description is not repeated except that:
comparative example 1:
the formulation was the same as in example 3 except that no accelerator was contained.
Comparative example 2:
the formulation was the same as in example 3 except that the defoaming agent was not contained.
Comparative example 3:
the formulation was the same as in example 3 except that the leveling agent was not contained.
Comparative example 4:
the formulation was the same as in example 3 except that the coupling agent was not contained.
Wherein, during testing, the tensile strength is measured on a universal tester; flexural strength was measured on an engineering ceramic flexural strength tester.
From the above data, it is known that the reactive sintering silicon carbide composite ceramic structure manufactured in the sixth embodiment has a bending strength between 168.1Mpa and 183.1Mpa and a tensile strength between 34.3Mpa and 40.5Mpa, and can accelerate the curing of the adhesive and shorten the curing time under the action of the accelerator; the coupling agent is used for reinforcing the connection between the ceramic reinforcing block and the ceramic, so that the connection strength between the ceramic reinforcing block and the ceramic is enhanced; the defoaming agent can prevent a large amount of bubbles from being in the adhesive after the adhesive is cured, and the bubbles are prevented from affecting the strong adhesion; by the synergistic effect between the above components, when the ratio of the components is as shown in the third embodiment, the error rate, the abrasion rate, the tensile strength and the bending strength of the obtained abrasion resistant body are all optimal values.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (11)
1. The manufacturing method of the reaction sintering silicon carbide composite ceramic structure is characterized by comprising the following steps of:
producing a ceramic body by an additive manufacturing method, and enabling the inner wall and/or the outer wall of the ceramic body to form a fixed groove;
carrying out high-temperature siliconizing sintering on the ceramic blank;
the ceramic reinforcing block is embedded into the fixing groove.
2. The method of fabricating a reaction-sintered silicon carbide composite ceramic structure according to claim 1, wherein in the step of embedding the ceramic reinforcing block into the fixing groove, the ceramic reinforcing block is embedded into the fixing groove of the sintered ceramic body;
or embedding the ceramic reinforcing block into the fixing groove of the ceramic blank before sintering, and bonding the ceramic reinforcing block and the ceramic blank by adopting an adhesive.
3. The method for manufacturing the reaction-sintered silicon carbide composite ceramic structure according to claim 1, wherein in the step, a ceramic blank is produced by an additive manufacturing method, and the inner wall and/or the outer wall of the ceramic blank form a fixed groove, and the components of raw materials used in the additive manufacturing are silicon carbide micro powder, carbon powder, resin and additives.
4. The method for producing a reactive sintered silicon carbide composite ceramic structure according to claim 3, wherein the average particle diameter of the particles in the raw material is 20 μm to 500 μm.
5. The method for manufacturing the reaction sintering silicon carbide composite ceramic structure according to claim 3, wherein the additive manufacturing process is a laser selective melting process, the adopted laser sintering power is 20-100W, and the layering thickness is 0.05-0.5 mm.
6. A method of making a reaction sintered silicon carbide composite ceramic structure in accordance with claim 3 wherein the components of said additive comprise a sintering aid.
7. The method for manufacturing the reaction sintering silicon carbide composite ceramic structure according to claim 1, wherein,
before the step of high-temperature siliconizing and sintering the ceramic blank, the method further comprises the steps of:
performing organic carburization on the ceramic blank;
and taking out the ceramic blank, drying and solidifying.
8. The method for manufacturing a reactive sintering silicon carbide composite ceramic structure according to claim 7, wherein in the step of performing high-temperature siliconizing sintering on the ceramic body, the dried ceramic body is placed in a sintering furnace, the temperature is raised at a speed of 20-80 ℃/h, the temperature is raised to 1500-1800 ℃, the heat preservation is continued for 1.5-3h, and the ceramic body is naturally cooled to room temperature.
9. The method of making a reaction sintered silicon carbide composite ceramic structure in accordance with claim 2, further comprising the step of, prior to the step of embedding the ceramic reinforcing block into the holding groove of the ceramic body prior to sintering:
and coating the adhesive on the inner wall of the fixing groove and/or the outer wall of the ceramic reinforcing block.
10. The method for manufacturing a reaction sintered silicon carbide composite ceramic structure according to claim 9, wherein the binder comprises the following components:
wherein the ratio of the silicon carbide powder to the phenolic resin is 2:1.
11. A ceramic structure, characterized in that it is manufactured by the method for manufacturing a reaction-sintered silicon carbide composite ceramic structure according to any one of claims 1 to 10;
the reaction-sintered silicon carbide composite ceramic structure comprises:
a ceramic body formed with a fixing groove; and
The ceramic reinforcing block is embedded in the fixing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311681207.5A CN117700229A (en) | 2023-12-06 | 2023-12-06 | Manufacturing method of reaction sintering silicon carbide composite ceramic structure and ceramic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311681207.5A CN117700229A (en) | 2023-12-06 | 2023-12-06 | Manufacturing method of reaction sintering silicon carbide composite ceramic structure and ceramic structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117700229A true CN117700229A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311681207.5A Pending CN117700229A (en) | 2023-12-06 | 2023-12-06 | Manufacturing method of reaction sintering silicon carbide composite ceramic structure and ceramic structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117700229A (en) |
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- 2023-12-06 CN CN202311681207.5A patent/CN117700229A/en active Pending
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