CN101143790A - Gel injection moulding forming technique for boron carbide-metal composite material - Google Patents
Gel injection moulding forming technique for boron carbide-metal composite material Download PDFInfo
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- CN101143790A CN101143790A CNA2007101138076A CN200710113807A CN101143790A CN 101143790 A CN101143790 A CN 101143790A CN A2007101138076 A CNA2007101138076 A CN A2007101138076A CN 200710113807 A CN200710113807 A CN 200710113807A CN 101143790 A CN101143790 A CN 101143790A
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Abstract
The invention relates to a gel casting technique of a boron carbide-metal composite. An organic monomer is first melted in organic solution, in which dispersant is added in order to produce monomer solution; ceramic-metal composite powder is added in the monomer solution, so that paste is produced; the paste is then added with the benzene or toluene of an initiator and uniformly mixed; the produced paste is injected into a die and goes through a vacuum degassing process for five to twenty minutes; the die filled with the paste is put into an oven with a constant temperature of 100 to 120 DEG C for five to thirty minute, so that an organic polymerization reaction occurs in the paste, and a rough blank is produced; the rough blank is taken out of the die and put into the oven with a constant temperature of 130 to 150 DEG C for drying for two to six hours; finally, the rough blank is degreased and sentered. The technique has the advantages of simplicity and low cost, moreover, the technique can shape a product with a complex shape and a near net size, the strength of the rough blank is high and can be mechanically processed before being sintered, and the content of organic matters in the rough blank is low and can be easily removed.
Description
Technical field
The present invention relates to a kind of inorganic materials moulding process, particularly relate to a kind of gel injection molding and forming technology of boron carbide-metal composite material.
Background technology
In the high performance ceramic process of preparation, moulding is one of gordian technique that influences its performance.The nineties in 20th century, on the basis of traditional colloidal formation technology, people such as U.S. Oak Ridge National Laboratory MAJanny and OOOmatete have invented a kind of technology---gel casting forming technology (Gelcasting) of low-cost preparation high-performance ceramic biscuit.It is that traditional ceramics technology and polymer chemistry are combined, and introduces a kind of new shaping mechanism, has realized that the slurry original position solidifies.Its ultimate principle is in the dense ceramic suspension body that contains organic monomeric low viscosity, high solid loading, add catalyzer and initiator, make the organic monomer gel polymerisation in the concentrated suspension become tridimensional network, thereby make the powder particle in-situ curing molding in the concentrated suspension.This technology is easy to carry out mechanical workout with molding biscuit intensity height, and organic content is low, degreasing easily, and the outstanding advantages such as ceramic of energy near-net-shape complicated shape have the shaping method of ceramics of market outlook and become a kind of showing unique characteristics.
In recent years gel injection molding and forming technology had been done number of research projects, mainly concentrate on the high-performance ceramic field, carry out the research of aluminum oxide, silicon nitride, silicon carbide, zirconium white and matrix material isogel injection molding and forming technology thereof, obtained many breakthrough achievements.Matrix material for the preparation boron carbide-metal, the general employing is immersed in method in the fused liquid metal with the norbide biscuit in the document, its technology is comparatively complicated, the equipment cost height, but adopting gel injection molding and forming technology to prepare boron carbide-metal composite material does not also have relevant report both at home and abroad.
Summary of the invention
The objective of the invention is to be to provide a kind of gel injection molding and forming technology of boron carbide-metal composite material, it has simplified production technique greatly, to remedy the above-mentioned deficiency of prior art.
A kind of gel injection molding and forming technology of boron carbide-metal composite material is characterized in that earlier organic monomer being dissolved in the organic solvent, and adds dispersion agent, makes monomer solution; In monomer solution, add the ceramic-metal composite granule, make slurry; Add the benzene or the toluene solution of initiator then, mix; Subsequently the slurry that makes is injected mould and vacuum outgas 5～20 minutes; It is 100～120 ℃ baking oven that the mould that slurry will be housed is again put into temperature, and constant temperature 5～30 minutes makes the reaction of slurry generation organic polymer, obtains biscuit; Biscuit is deviate from from mould, in 130～150 ℃ baking oven, freeze-day with constant temperature 2～6 hours; At last with biscuit degreasing and sintering.
Moulding process of the present invention is simple, and cost is low, and the boron carbide-metal composite material biscuit density of preparation and intensity height are easy to mechanical workout, and is easy to prepare complex-shaped boron carbide-metal composite material.
Description of drawings
The gel injection biscuit micro-structure diagram that norbide that accompanying drawing makes for the present invention and aluminium powder volume ratio are 70: 30.
Embodiment
The present invention is dissolved in organic monomer in the organic solvent earlier, and adds dispersion agent, makes monomer solution; In monomer solution, add the ceramic-metal composite granule, make slurry; Add the benzene or the toluene solution of initiator then, mix; Subsequently the slurry that makes is injected mould and vacuum outgas 5～20 minutes; It is 100～120 ℃ baking oven that the mould that slurry will be housed is again put into temperature, and constant temperature 5～30 minutes makes the reaction of slurry generation organic polymer, obtains biscuit; Biscuit is deviate from from mould, in 130～150 ℃ baking oven, freeze-day with constant temperature 2～6 hours; At last with biscuit degreasing and sintering.
Ceramic-metal composite granule of the present invention is made up of boron carbide powder and metal powder, and wherein the volumn concentration of boron carbide powder in the ceramic-metal composite granule is 10～90%.Metal in the described ceramic-metal composite granule is 1～3 kind or their alloy in copper, aluminium, magnesium, silicon, titanium, zirconium, hafnium, cobalt, the manganese.Described organic solvent is propyl carbinol, n-Octanol, dimethyl phthalate or dibutyl phthalate.Described initiator is Diisopropyl azodicarboxylate, 2,2'-Azobis(2,4-dimethylvaleronitrile), dicumyl peroxide or dibenzoyl peroxide, and initiator benzene or the toluene solution volumn concentration in slurry is 1～5%.Described dispersion agent is CH-10S, Tilo-20100, AD-1700 or Solspere-2000.The volumn concentration of described dispersion agent in slurry is 1～10%.Described organic monomer is a kind of to be TMPTA (TMPTA) or oxyethyl group TMPTA (EO
3-TMPTA), another kind is 1,6 hexanediol diacrylate (HDDA) or 1,4 butanediol diacrylate (BDDA); The volumn concentration of described two kinds of organic monomers in slurry is 5～20%; The volume ratio of described two kinds of organic monomers is 1: 1～10.
Key problem in technology of the present invention: at first, select appropriate organic solvent, this organic solvent must be a monomer, has lower viscosity, and has lower vapour pressure under monomer crosslinked temperature; Secondly, select suitable dispersion agent, this dispersion agent does not cause the organic monomer polymerization.
Embodiment
In the 20ml n-Octanol, add 2ml organic monomer TMPTA (TMPTA) and 18ml organic monomer 1,6 hexanediol diacrylate (HDDA) and 8ml dispersing agent C H-10S, mix and make monomer solution; In monomer solution, add the 112g particle diameter again and be about 2 μ m boron carbide powders and 52g particle diameter and be about 45 μ m aluminium powders and mix and make slurry, add the 4ml volumn concentration again and be the benzole soln of 10% dibenzoyl peroxide, continue to mix, obtain slurry; Slurry was injected mould and vacuum outgas 15 minutes; The mould that slurry will be housed is again put into 110 ℃ baking oven through 20 minutes curing moldings; Again with the biscuit after the demoulding in 130 ℃ baking oven dry 4 hours, to be dried fully after, obtain biscuit of ceramics, the bending strength of this biscuit is 25MPa, can carry out sintering after mechanical workout or the degreasing.
Claims (6)
1. the gel injection molding and forming technology of a boron carbide-metal composite material is characterized in that earlier organic monomer being dissolved in the organic solvent, and adds dispersion agent, makes monomer solution; In monomer solution, add the ceramic-metal composite granule, make slurry; Add the benzene or the toluene solution of initiator then, mix; Subsequently the slurry that makes is injected mould and vacuum outgas 5～20 minutes; It is 100～120 ℃ baking oven that the mould that slurry will be housed is again put into temperature, and constant temperature 5～30 minutes makes the reaction of slurry generation organic polymer, obtains biscuit; Biscuit is deviate from from mould, in 130～150 ℃ baking oven, freeze-day with constant temperature 2～6 hours; At last with biscuit degreasing and sintering.
2. as gel injection molding and forming technology by the described boron carbide-metal composite material of claim 1, it is characterized in that described ceramic-metal composite granule is made up of boron carbide powder and metal powder, the volumn concentration of boron carbide powder in the ceramic-metal composite granule is 10～90%; Metal in the described ceramic-metal composite granule is 1～3 kind or their alloy in copper, aluminium, magnesium, silicon, titanium, zirconium, hafnium, cobalt, the manganese.
3. the gel injection molding and forming technology of boron carbide-metal composite material as claimed in claim 1 is characterized in that described organic solvent is propyl carbinol, n-Octanol, dimethyl phthalate or dibutyl phthalate.
4. the gel injection molding and forming technology of boron carbide-metal composite material as claimed in claim 1 is characterized in that described initiator is Diisopropyl azodicarboxylate, 2,2'-Azobis(2,4-dimethylvaleronitrile), dicumyl peroxide or dibenzoyl peroxide; The benzene of initiator or the toluene solution volumn concentration in slurry is 1～5%.
5. the gel injection molding and forming technology of boron carbide-metal composite material as claimed in claim 1 is characterized in that described dispersion agent is CH-10S, Tilo-20100, Solspere-2000 or AD-1700; The volumn concentration of described dispersion agent in slurry is 1～10%.
6. the gel injection molding and forming technology of boron carbide-metal composite material as claimed in claim 1, it is characterized in that described organic monomer is a kind of for TMPTA or oxyethyl group TMPTA, another kind is 1,6-hexanediyl ester or 1,4 butanediol diacrylate; The volumn concentration of described two kinds of organic monomers in slurry is 5～20%; The volume ratio of two kinds of organic monomers is 1: 1～10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101138076A CN101143790B (en) | 2007-09-13 | 2007-09-13 | Gel injection moulding forming technique for boron carbide-metal composite material |
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| CN2007101138076A CN101143790B (en) | 2007-09-13 | 2007-09-13 | Gel injection moulding forming technique for boron carbide-metal composite material |
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| CN101143790A true CN101143790A (en) | 2008-03-19 |
| CN101143790B CN101143790B (en) | 2010-10-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452125A (en) * | 2010-10-22 | 2012-05-16 | 比亚迪股份有限公司 | Gel casting method and preparation method of ceramic |
| CN114042912A (en) * | 2021-11-12 | 2022-02-15 | 哈尔滨工业大学 | Method for finely controlling mechanical properties of NiAl-based composite material through powder particle size |
-
2007
- 2007-09-13 CN CN2007101138076A patent/CN101143790B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452125A (en) * | 2010-10-22 | 2012-05-16 | 比亚迪股份有限公司 | Gel casting method and preparation method of ceramic |
| CN102452125B (en) * | 2010-10-22 | 2014-02-12 | 比亚迪股份有限公司 | Gel casting method and preparation method of ceramic |
| CN114042912A (en) * | 2021-11-12 | 2022-02-15 | 哈尔滨工业大学 | Method for finely controlling mechanical properties of NiAl-based composite material through powder particle size |
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| CN101143790B (en) | 2010-10-20 |
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Granted publication date: 20101020 Termination date: 20120913 |