CN108658603A - A kind of preparation method of silicon carbide boron carbide composite material - Google Patents
A kind of preparation method of silicon carbide boron carbide composite material Download PDFInfo
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- CN108658603A CN108658603A CN201711423936.5A CN201711423936A CN108658603A CN 108658603 A CN108658603 A CN 108658603A CN 201711423936 A CN201711423936 A CN 201711423936A CN 108658603 A CN108658603 A CN 108658603A
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- C04B35/573—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 reaction sintering or recrystallisation
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Abstract
The present invention relates to technical field of inorganic material, and in particular to a kind of preparation method of silicon carbide boron carbide composite material, material requested are：Carbon black, boron carbide, metallic silicon, binder, additive, the preparation method of the carbon black boron carbide composite material of the present invention, its manufacture craft is simple, prepared carbon black boron carbide composite material has the advantages that high intensity, good toughness, density are low etc., wherein the making of finished product can be achieved greatly in carbon black proportion controlled range from 5% to 70%, due to the difference of carbon black proportion, product shows a variety of different excellent properties.
Description
Technical field
The present invention relates to technical field of inorganic material, and in particular to a kind of preparation side of silicon carbide boron carbide composite material
Method.
Background technology
Boron carbide alias black diamond, molecular formula B4C, usually grey black micro mist.It is known three kinds of most hard materials
One of, in the plate armour of tank, bulletproof jacket and many commercial Application product.Its mohs hardness is 9.3.It makees in 19th century
Byproduct for metal boride research is found, and is just scientifically studied until generation nineteen thirty.Boron carbide can be by using in electric furnace
Carbon restores diboron trioxide and is made.
Boron carbide can absorb a large amount of neutron without forming any radioactive isotope, therefore it is in nuclear energy power generation field
In it be highly desirable neutron-absorbing material, and neutron-absorbing material is mainly the rate for controlling nuclear fission.Boron carbide is in nuclear reaction stove
It is mainly made as controllable rodlike in, but it can be made powdered because of surface area to be increased sometimes.
Because having the characteristics that density is low, intensity is big, high-temperature stability and chemical stability are good.In wear-resistant material, ceramics
Reinforced phase, especially in lightweight armor, pile neutron absorbent etc. uses.In addition, with diamond and cubic boron nitride phase
Than boron carbide manufacture is easy, is of low cost, thus use is more extensive, can replace expensive Buddha's warrior attendant in some places
Stone, the application for being commonly in grinding, grinding, drilling etc..
When the composite material of prior art preparation boron carbide and silicon carbide, it is multiple that element silicon can corrode boron carbide formation silicon-carbon boron
Object is closed, toughness and the intensity value of silicon-carbon boron compound are significantly lower than boron carbide so that the boron carbide composite material of sintering occurs
Hot spot, to reduce quality of materials.
Invention content
The present invention provides a kind of preparation method of silicon carbide boron carbide composite material, and material requested is：Carbon black, carbonization
Boron, metallic silicon, binder, additive,
Preparation method is：
1）Mixing：By carbon black with boron carbide according to mixing, wherein carbon black accounts for the 4% to 6% of total weight, is then added and accounts for gross weight
The binder of amount 6% to 8%, the additive for accounting for total weight 1%, the secondary mixing of alcohol progress for accounting for total weight 50%；
2）It is granulated：Powdered mixture is subjected to mist projection granulating；
3）Compacting：Fine-grained mixture is placed in mold, boron cake is pressed under 30 megapascal to the pressure of 80 megapascal；
4）It is dry：By in the boron cake merging hothouse of compression moulding, carries out slowly heating drying, drying temperature and slowly risen from room temperature
To 130 degrees Celsius to 200 degrees Celsius, heating takes as 24 hours, heating rate is at the uniform velocity to heat up；
5）With silicon：Metallic silicon power 40 mesh of the silicone content more than 99% is taken to be mixed to 160 mesh with the binder for accounting for total weight 3%,
Uniformly mixed silica flour is pressed into silicon cake；
6）Sintering：The overlapping of silicon cake is placed on boron cake, is placed into vacuum drying oven and is sintered, sintering temperature is 1480 degrees Celsius
To 1600 degrees Celsius, vacuum degree is less than or equal to 10pa；
7）It is cooling：By the plank furnace cooling of sinter molding, it is cooled to room temperature taking-up.
8）Except silicon：The white residue of surface residual is subjected to blasting treatment.
Preferably, the pressed density of the boron cake is 1.7 grams per cubic centimeter to 1.75 grams per cubic centimeter.
Preferably, in the sintering process silicon cake and boron cake weight ratio 1.1：1 to 1.2：1.
Preferably, the binder is phenolic resin, and the additive is surfactant, and main component is Aluminate
Chelate.
Preferably, the alternative except the blasting treatment mode for removing surface residual debris during silicon is burnishing part
Reason.
Compared with prior art, the present invention has the advantages that：The silicon carbide boron carbide composite material of the present invention
Preparation method wraps up carbonization boron surface using activating agent, element silicon is prevented to corrode boron carbide, and prepared composite material makes work
Skill is simple, and prepared boron carbide composite material has the advantages that high intensity, good toughness, density are low etc..
Specific implementation mode
The present invention is described further below：
The preparation method of the carbon black boron carbide composite material of the present invention, material requested are：Carbon black, boron carbide, metallic silicon, bonding
Agent, additive,
Preparation method is：
1）Mixing：By carbon black with boron carbide according to mixing, wherein carbon black accounts for the 4% to 6% of total weight, is then added and accounts for gross weight
The binder of amount 6% to 8%, the additive for accounting for total weight 1%, the secondary mixing of alcohol progress for accounting for total weight 50%；
2）It is granulated：Powdered mixture is subjected to mist projection granulating；
3）Compacting：Fine-grained mixture is placed in mold, boron cake is pressed under 30 megapascal to the pressure of 80 megapascal；
4）It is dry：By in the boron cake merging hothouse of compression moulding, carries out slowly heating drying, drying temperature and slowly risen from room temperature
To 130 degrees Celsius to 200 degrees Celsius, heating takes as 24H, and heating rate is at the uniform velocity to heat up；
5）With silicon：Metallic silicon power 40 mesh of the silicone content more than 99% is taken to be mixed to 160 mesh with the binder for accounting for total weight 3%,
Uniformly mixed silica flour is pressed into silicon cake；
6）Sintering：The overlapping of silicon cake is placed on boron cake, is placed into vacuum drying oven and is sintered, sintering temperature is 1480 degrees Celsius
To 1600 degrees Celsius, vacuum degree is less than or equal to 10pa；
7）It is cooling：By the plank furnace cooling of sinter molding, it is cooled to room temperature taking-up.
8）Except silicon：The white residue of surface residual is subjected to blasting treatment.
Composite density prepared by the present invention is 2.63 grams per cubic centimeter to 2.65 grams per cubic centimeter, and bending resistance is strong
Degree is more than or equal to 350 megapascal.
The major function of the surfactant of additive is package carbonization boron surface, prevents the metallic silicon pair in sintering process
Boron carbide further corrodes.
Embodiment 1：
Using the boron carbide of boron carbide 2.2kg, F800 of boron carbide 2.9KG, F600 of boron carbide 2.9kg, F400 of F360
2KG, carbon black 600g, binder 800g, additive 80g composition proportion carry out method as above and configured, boron carbide obtained
Pressed density be 1.76 grams it is per cubic centimeter, final sintered density be 2.65 grams it is per cubic centimeter.
Embodiment 2
Using the boron carbide 30g of boron carbide 10g, F800 of boron carbide 60g, F600 of F150, carbon black 7g, binder 8g, addition
The composition proportion of agent 1g carries out method as above and is configured, and the pressed density of boron carbide obtained is 1.85 grams per cubic centimeter,
Final sintered density is 2.66 grams per cubic centimeter.
Using technical solutions according to the invention or those skilled in the art under the inspiration of technical solution of the present invention,
Similar technical solution is designed, and reaches above-mentioned technique effect, is to fall into protection scope of the present invention.
Claims (5)
1. a kind of preparation method of silicon carbide boron carbide composite material, spy are that material requested is：Carbon black, boron carbide, metal
Silicon, binder, additive,
Preparation method is：
1）Mixing：By carbon black with boron carbide according to mixing, wherein carbon black accounts for the 4% to 6% of total weight, is then added and accounts for always
The binder of weight 6% to 8%, the additive for accounting for total weight 1%, the secondary mixing of alcohol progress for accounting for total weight 50%；
2）It is granulated：Powdered mixture is subjected to mist projection granulating；
3）Compacting：Fine-grained mixture is placed in mold, boron cake is pressed under 30 megapascal to the pressure of 80 megapascal；
4）It is dry：By in the boron cake merging hothouse of compression moulding, it is slow from room temperature to carry out slowly heating drying, drying temperature
Rise to 130 degrees Celsius to 200 degrees Celsius, heating takes as 24H, and heating rate is at the uniform velocity to heat up；
5）With silicon：Metallic silicon power 40 mesh of the silicone content more than 99% is taken to be mixed to 160 mesh with the binder for accounting for total weight 3%,
Uniformly mixed silica flour is pressed into silicon cake；
6）Sintering：The overlapping of silicon cake is placed on boron cake, is placed into vacuum drying oven and is sintered, sintering temperature is 1480 Celsius
For degree to 1600 degrees Celsius, vacuum degree is less than or equal to 10pa；
7）It is cooling：By the plank furnace cooling of sinter molding, it is cooled to room temperature taking-up；
8）Except silicon：The white residue of surface residual is subjected to blasting treatment.
2. a kind of preparation method of silicon carbide boron carbide composite material according to claim 1, spy are the boron cake
Pressed density be 1.7 grams per cubic centimeter to 1.75 grams it is per cubic centimeter.
3. a kind of preparation method of silicon carbide boron carbide composite material according to claim 1, spy are the sintering
The weight ratio 1.1 of silicon cake and boron cake in the process：1 to 1.2：1.
4. a kind of preparation method of silicon carbide boron carbide composite material according to claim 1, spy are the bonding
Agent is phenolic resin, and the additive is surfactant, and main component is Aluminate chelate.
5. a kind of preparation method of silicon carbide boron carbide composite material according to claim 1, spy is described except silicon
The alternative for removing the blasting treatment mode of surface residual debris in the process is grinding process.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020083778A (en) * | 2001-04-30 | 2002-11-04 | 주식회사 포스코 | Method for manufacturing Alumina-Silicon Carbide-Carbon brick having oxidation-resistance and expansibility |
| CN102219518A (en) * | 2011-03-31 | 2011-10-19 | 浙江立泰复合材料有限公司 | Boron carbide-silicon carbide complex ceramic and preparation method thereof |
| CN104817325A (en) * | 2015-05-19 | 2015-08-05 | 中国兵器工业第五二研究所烟台分所 | Preparation method of reactive sintered boron carbide-silicon carbide composite ceramic material |
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2017
- 2017-12-25 CN CN201711423936.5A patent/CN108658603A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020083778A (en) * | 2001-04-30 | 2002-11-04 | 주식회사 포스코 | Method for manufacturing Alumina-Silicon Carbide-Carbon brick having oxidation-resistance and expansibility |
| CN102219518A (en) * | 2011-03-31 | 2011-10-19 | 浙江立泰复合材料有限公司 | Boron carbide-silicon carbide complex ceramic and preparation method thereof |
| CN104817325A (en) * | 2015-05-19 | 2015-08-05 | 中国兵器工业第五二研究所烟台分所 | Preparation method of reactive sintered boron carbide-silicon carbide composite ceramic material |
Non-Patent Citations (1)
| Title |
|---|
| 张翠萍: "反应烧结碳化硼复合材料显微组织和力学性能的研究", 《中国博士学位论文全文数据库》 * |
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