CN109336630B - Support and preparation method thereof - Google Patents
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- CN109336630B CN109336630B CN201810998326.6A CN201810998326A CN109336630B CN 109336630 B CN109336630 B CN 109336630B CN 201810998326 A CN201810998326 A CN 201810998326A CN 109336630 B CN109336630 B CN 109336630B
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- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
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- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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Abstract
The invention relates to a bracket and a preparation method thereof, belonging to the technical field of material preparation. The support comprises a support body and a protective layer on the surface of the support body, wherein the support body is made of composite ceramic, and the composite ceramic comprises the following raw materials in parts by weight: si3N460-100 parts of SiC10-30 parts of SiO210-30 parts of carbon fiber, 10-20 parts of MgO1-5 parts of Y2O31-5 parts of mineral powder and 5-15 parts of ore powder. According to the bracket, the protective layer is arranged on the surface of the main body, and the main body contains the carbon fiber and the mineral powder which are the same as those of the protective layer, so that the mechanical properties of the bracket, such as strength, bending strength and the like, are improved. Moreover, the protective layer biomass fibers, the carbon fibers, the mineral powder, the auxiliary agent and the polytetrafluoroethylene are extruded and granulated and are arranged on the surface of the body through pressure forming, so that the corrosion resistance of the support is further improved.
Description
Technical Field
The invention relates to a bracket and a preparation method thereof, belonging to the technical field of material preparation.
Background
In a laboratory or a place with more chemicals, the supports are required to be placed on the supports according to types, and the common alloy supports are poor in corrosivity and are not suitable for placing acidic, alkaline and other corrosive articles. In the prior art, magnesium and magnesium alloy called as green metal are generally adopted as aluminum alloy with better corrosion resistance and are not applied to the aspects of spaceflight, military industry, automobiles, communication, electronics, medicines and the like. For example, chinese patent application document (CN 107937781a) discloses a bracket made of magnesium alloy, however, the price of magnesium alloy is high, micro-arc oxidation and rust-proof treatment are required in the later stage, the preparation steps are complicated, and the production cost is further increased.
Disclosure of Invention
The present invention has been made in view of the above problems occurring in the prior art, and an object of the present invention is to provide a corrosion-resistant and high-hardness stent.
The purpose of the invention can be realized by the following technical scheme: the utility model provides a support, support include the protective layer on support body and support body surface, wherein, the support body make by composite ceramic, composite ceramic include the raw materials of following parts by weight: si3N4: 60-100 parts of SiC: 10-30 parts of SiO2: 10-30 parts of carbon fiber: 10-20 parts of MgO: 1-5 parts of, Y2O31-5 parts of ore powder: 5-15 parts.
In the above-mentioned support, the protective layer comprises the following raw materials in parts by weight: 10-20 parts of biomass fiber, 5-10 parts of carbon fiber, 40-60 parts of polytetrafluoroethylene, 5-10 parts of mineral powder and 1-8 parts of auxiliary agent.
In the above-mentioned support, the mineral powder is one or more of calcium carbonate, calcium silicate and talcum powder.
In the above stent, the average particle size of the ore powder is 80 μm to 500 μm.
In the bracket, the biomass fiber is one or more of straw powder, wood powder and mu kang powder.
In the bracket, the average grain diameter of the biomass fiber is 20-100 μm.
The invention also provides a preparation method of the bracket, which comprises the following steps:
weighing raw materials of the composite ceramic: si3N460-100 parts of SiC10-30 parts of SiO210-30 parts of carbon fiber, 10-20 parts of MgO1-5 parts of Y2O31-5 parts of mineral powder and 5-15 parts of composite ceramic raw materials are pressed into blanks and sintered into a support body;
weighing raw materials of a protective layer: 10-20 parts of biomass fibers, 5-10 parts of carbon fibers, 40-60 parts of polytetrafluoroethylene, 5-10 parts of mineral powder and 1-8 parts of an auxiliary agent; firstly, grinding biomass fibers into powder with the particle size of 20-100 mu m; then adding carbon fiber, ore powder and an auxiliary agent, and heating to 100-130 ℃ for premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
In the preparation method of the stent, the pressure for pressing is 100-120 MPa.
In the preparation method of the bracket, the sintering is 1450-1550 DEG C
Compared with the prior art, the protective layer is arranged on the surface of the main body of the bracket, so that the corrosion resistance of the bracket is improved while the mechanical property of the bracket is further ensured. The main body of the invention contains the carbon fiber and the mineral powder which are the same as the protective layer, when the support blank is immersed into the protective layer slurry at the temperature of 100-130 ℃, the carbon fiber and the mineral powder in the support body can generate a synergistic effect with the protective layer slurry, so that the binding force between the protective layer and the support body is further improved, and the mechanical properties of the support, such as bending strength, toughness and the like, are further improved. Furthermore, the biomass fibers, the carbon fibers, the mineral powder and the auxiliary agent in the protective layer are premixed at the temperature of 100-130 ℃, so that the biomass fibers, the carbon fibers and the mineral powder can be better mixed with the polytetrafluoroethylene, and then are extruded and granulated with the polytetrafluoroethylene and are arranged on the surface of the body through pressure forming, so that the protective layer material is better and uniformly attached to the surface of the support body, and the corrosion resistance of the support is further improved.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
Weighing raw materials of the composite ceramic: si3N480 parts of SiC 20 parts of SiO220 parts of carbon fiber 8 parts, MgO 3 parts and Y2O32 parts of calcium carbonate with the average grain diameter of 80-500 mu m, pressing the raw material of the composite ceramic into a blank under 110MPa, and sintering the blank into a support body at 1500 ℃;
weighing raw materials of a protective layer: 15 parts of biomass fiber straw powder with the average particle size of 20-100 mu m, 8 parts of carbon fiber, 50 parts of polytetrafluoroethylene, 8 parts of calcium carbonate and 5 parts of auxiliary agent; grinding biomass fiber straw powder into powder with the particle size of 20-100 mu m; then adding carbon fiber, calcium carbonate and an auxiliary agent, heating to 120 ℃, and premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
Example 2
Weighing raw materials of the composite ceramic: si3N470 parts of SiC 25 parts of SiO215 parts of carbon fiber 9 parts, MgO 2 parts and Y2O34 parts of calcium silicate with the average grain diameter of 80-500 mu m, pressing the raw material of the composite ceramic into a blank under 105MPa, and sintering the blank at 1480 ℃ to form a bracket body;
weighing raw materials of a protective layer: 12 parts of biomass fiber wood powder with the average particle size of 20-100 mu m, 9 parts of carbon fiber, 45 parts of polytetrafluoroethylene, 6 parts of calcium silicate and 7 parts of auxiliary agent; firstly, grinding biomass fiber wood powder into powder with the particle size of 20-100 mu m; then adding carbon fiber, calcium silicate and an auxiliary agent, heating to 110 ℃, and premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
Example 3
Weighing raw materials of the composite ceramic: si3N490 parts of SiC 15 parts of SiO225 parts of carbon fiber 6 parts, MgO 4 parts and Y2O32 parts of talcum powder with the average grain diameter of 80-500 mu m, pressing the raw material of the composite ceramic into a blank under 115MPa, and sintering the blank into a bracket body at 1520 ℃;
weighing raw materials of a protective layer: 18 parts of biomass fiber wood health powder with the average particle size of 20-100 microns, 6 parts of carbon fiber, 55 parts of polytetrafluoroethylene, 9 parts of talcum powder and 2 parts of auxiliary agent; firstly, grinding biomass fiber kakong powder into powder with the particle size of 20-100 mu m; then adding carbon fiber, talcum powder and auxiliary agent, heating to 125 ℃ and premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product. Example 4
Weighing raw materials of the composite ceramic: si3N460 parts of SiC 30 parts of SiO230 parts of carbon fiber 10 parts, MgO1 part and Y2O35 parts of calcium silicate with the average grain diameter of 80-500 mu m, and the raw material of the composite ceramic is processed at 120MPa, pressing to form a blank, and sintering at 1550 ℃ to form a support body;
weighing raw materials of a protective layer: 10 parts of biomass fiber wood powder with the average particle size of 20-100 mu m, 10 parts of carbon fiber, 60 parts of polytetrafluoroethylene, 5 parts of calcium silicate and 1 part of auxiliary agent; firstly, grinding biomass fibers into powder with the particle size of 20-100 mu m; then adding carbon fiber, ore powder and an auxiliary agent, and heating to 100-130 ℃ for premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
Example 5
Weighing raw materials of the composite ceramic: si3N4100 parts of SiC10 parts of SiO210 parts, 5 parts of carbon fiber, 5 parts of MgO and Y2O31 part of calcium carbonate with the average grain diameter of 80-500 mu m, pressing the raw material of the composite ceramic into a blank under 100MPa, and sintering the blank into a support body at 1450 ℃;
weighing raw materials of a protective layer: 20 parts of biomass fiber straw powder with the average particle size of 20-100 mu m, 5 parts of carbon fiber, 40 parts of polytetrafluoroethylene, 10 parts of calcium carbonate and 8 parts of auxiliary agent; firstly, grinding biomass fibers into powder with the particle size of 20-100 mu m; then adding carbon fiber, ore powder and an auxiliary agent, heating to 130 ℃, and premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
Comparative example 1
The comparative example differs from example 1 only in that the comparative example stent has no protective layer, only the stent body.
Comparative example 2
The comparative example differs from example 1 only in that the stent body of the comparative example does not contain carbon fiber and calcium carbonate, and the rest is the same as example 1, and will not be described again here.
Comparative example 3
The comparative example differs from example 1 only in that the comparative example stent body does not contain SiC and SiO2Otherwise, as in embodiment 1, the description will not be repeated here.
Comparative example 4
This comparative example differs from example 1 only in that the comparative example holder body does not contain Y2O3Otherwise, as in embodiment 1, the description will not be repeated here.
Comparative example 5
The comparative example is different from example 1 only in that the protective layer of the comparative example does not contain carbon fiber and calcium carbonate, and the rest is the same as example 1 and will not be described again here.
Comparative example 6
The comparative example differs from example 1 only in that the protective layer of the comparative example does not contain polytetrafluoroethylene, and the rest is the same as example 1 and will not be described again here.
The auxiliary agents used in the above embodiments of the present invention are all common processing agents in the art, such as lubricants, and the like,
The test standard GB/T6569-86 of the bending strength and the test standard ASTM B645-2007 of the toughness respectively refer to the time when rust appears on the surface of the steel plate after the steel plate is sprayed with acid with the pH value of 5-6 at normal temperature and the time when the steel plate is sprayed with a sodium chloride solution containing 0.9% at normal temperature.
The scaffolds of examples 1-5 and comparative examples 1-6 were subjected to performance tests, and the test results are shown in table 1 below.
Table 1: results of Performance test of scaffolds in examples 1 to 5 and comparative examples 1 to 6
In conclusion, the protective layer is arranged on the surface of the main body of the bracket, so that the mechanical property of the bracket is further ensured, and the corrosion resistance of the bracket is improved. The main body of the invention contains carbon fiber and mineral powder which are the same as those of the protective layer, thereby improving the mechanical properties of the bracket, such as strength, bending strength and the like. In addition, the biomass fibers, the carbon fibers, the mineral powder, the auxiliary agent and the polytetrafluoroethylene in the protective slurry are extruded and granulated and are arranged on the surface of the body through pressure molding, so that the protective layer material is better and uniformly attached to the surface of the support body, and the corrosion resistance of the support is further improved.
The technical scope of the invention claimed by the embodiments herein is not exhaustive and new solutions formed by equivalent replacement of single or multiple technical features in the embodiments are also within the scope of the invention, and all parameters involved in the solutions of the invention do not have mutually exclusive combinations if not specifically stated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (7)
1. The support is characterized by comprising a support body and a protective layer on the surface of the support body, wherein the support body is made of composite ceramic, and the composite ceramic comprises the following raw materials in parts by weight: si3N4: 60-100 parts of SiC: 10-30 parts of SiO2: 10-30 parts of carbon fiber: 5-10 parts of MgO: 1-5 parts of, Y2O31-5 parts of ore powder: 5-10 parts; the protective layer comprises the following raw materials in parts by weight: 10-20 parts of biomass fibers, 5-10 parts of carbon fibers, 40-60 parts of polytetrafluoroethylene, 5-10 parts of mineral powder and 1-8 parts of an auxiliary agent; the ore powder is one or more of calcium carbonate, calcium silicate and talcum powder.
2. A scaffold according to claim 1, wherein the mineral powder has an average particle size of from 80 μm to 500 μm.
3. The stent of claim 1, wherein the biomass fiber is one or more of straw powder, wood powder and wood flour.
4. A scaffold according to claim 1 or 3, wherein the biomass fibres have an average particle size of 20 μm to 100 μm.
5. The preparation method of the stent is characterized by comprising the following steps:
weighing raw materials of the composite ceramic: si3N460-100 parts of SiC10-30 parts of SiO210-30 parts of carbon fiber, 10-20 parts of MgO1-5 parts of Y2O31-5 parts of mineral powder and 5-15 parts of composite ceramic raw materials are pressed into blanks and sintered into a support body;
weighing raw materials of a protective layer: 10-20 parts of biomass fibers, 5-10 parts of carbon fibers, 40-60 parts of polytetrafluoroethylene, 5-10 parts of mineral powder and 1-8 parts of an auxiliary agent; firstly, grinding biomass fibers into powder with the particle size of 20-100 mu m; then adding carbon fiber, ore powder and an auxiliary agent, and heating to 100-130 ℃ for premixing;
extruding and granulating the premixed powder and polytetrafluoroethylene to obtain a protective layer material;
and (4) placing the protective layer material on the surface of the bracket body through extrusion molding to obtain a finished bracket product.
6. The method for preparing a stent according to claim 5, wherein the pressing pressure is 100-120 MPa.
7. The method as claimed in claim 5, wherein the sintering is 1450-1550 ℃.
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|---|---|---|---|---|
| US3964933A (en) * | 1974-04-08 | 1976-06-22 | Exxon Research And Engineering Company | Carbon article including electrodes and methods of making the same |
| FR2785664B1 (en) * | 1998-11-05 | 2001-02-02 | Snecma | COMPOSITE MATERIAL HEAT EXCHANGER AND METHOD FOR THE PRODUCTION THEREOF |
| US6265139B1 (en) * | 1998-12-30 | 2001-07-24 | Samsung Electro-Mechanics Co., Ltd. | Method for fabricating piezoelectric/electrostrictive ceramic micro actuator using photolithography |
| US20060127699A1 (en) * | 2002-09-14 | 2006-06-15 | Christoph Moelle | Protective layer and process and arrangement for producing protective layers |
| DE10318514B3 (en) * | 2003-04-24 | 2004-09-16 | Dornier Gmbh | Multiple layer ceramic composite material used as a heat-resistant electromagnetic window comprises an oxidic carbon-free fiber-reinforced ceramic layer, and a layer made from a thermal insulating layer consisting of a pure oxidic foam |
| CN102476459B (en) * | 2011-06-01 | 2013-06-12 | 深圳光启高等理工研究院 | Manufacturing method of dielectric substrate and metamaterial |
| TWI492978B (en) * | 2013-07-24 | 2015-07-21 | Grand Tek Advance Material Science Co Ltd | Composite micropowder, ceramic paint, protective coating, and method for manufacturing composite micropowder |
| CN104446465B (en) * | 2014-08-28 | 2017-09-22 | 云南云天化股份有限公司 | A kind of ceramic material and preparation method thereof, polytetrafluoroethylene (PTFE) ceramic composite and preparation method thereof and substrate |
| CN107253853B (en) * | 2017-06-16 | 2019-07-19 | 湖北三江航天江北机械工程有限公司 | Surface has the quartzy composite ceramics antenna house preparation method of polytetrafluoroethylene (PTFE) moisture barrier coatings |
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