CN1272282C - Method for preparing lightweight boron carbide armour ceramics - Google Patents
Method for preparing lightweight boron carbide armour ceramics Download PDFInfo
- Publication number
- CN1272282C CN1272282C CN 03111597 CN03111597A CN1272282C CN 1272282 C CN1272282 C CN 1272282C CN 03111597 CN03111597 CN 03111597 CN 03111597 A CN03111597 A CN 03111597A CN 1272282 C CN1272282 C CN 1272282C
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- Prior art keywords
- microns
- temperature
- powder
- graphite jig
- sintering
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- 239000000919 ceramic Substances 0.000 title claims abstract description 9
- 229910052580 B4C Inorganic materials 0.000 title claims abstract description 8
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 19
- 239000010439 graphite Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a method for making light-weight boron carbide armor ceramics. In the method, boron carbide powder is treated by overflow selection grading, drying and breaking, then the broken powder is selected, uniformly mixed according to certain graduation and granulated by a granulating machine, the single-phase no auxiliary agent hot pressing sintering technique is adopted, the granulated powder is uniformly put into a hot-pressing graphite mold, together with the graphite mold, the powder is sent into a high-temperature high-pressure vacuum sintering furnace for bidirectional pressurization for hot pressing sintering, the temperature is uniformly raised from the room temperature for several hours, after reaching the pre-determined temperature, the temperature is preserved for several hours, press to the designed height is carried out, the temperature is naturally cooled to the room temperature, and the product obtained through hot pressing sintering is taken out from the furnace together with the graphite mold to be abraded in a mechanical processing mode so as to reach the dimensional precision requirement. The light-weight boron carbide armor ceramics produced by the method have the advantages of good density uniformity, low impurity content, uniform crystal size and stable and reliable mechanical property, and can meet the protection technical index requirements of protection armor materials.
Description
Technical field: the preparation method who the present invention relates to a kind of pottery.
Background technology: production lightweight norbide armor ceramic has HIP sintering and two kinds of methods of hot pressed sintering at present; the former preparation cost height; can't be applied to large-scale production; latter's cost is low; but product exists, and density uniformity is poor, foreign matter content height, grain fineness number inequality, mechanical property problem of unstable, can not satisfy the guard technology index request of bulletproof armour material.
Summary of the invention: the purpose of this invention is to provide a kind of product density good uniformity, foreign matter content is low, grain fineness number is even, stable mechanical performance, can satisfy the preparation method of lightweight norbide armor ceramic of the guard technology index request of protection armour material.Technical solution of the present invention is: with boron carbide powder overflow sorting classifying, after the drying, enter and be crushed to 15～25 microns in the airflow milling, again sorting is carried out in entry under the powder normal temperature of fragmentation, by weight ratio, extracting the granularity section is 3.0～4.0 microns, 0.8～1.2 part; 6.5～7.5 microns, 1.8～2.2 parts; 13～15 microns; 6.8～7.2 parts; arrange in pairs or groups; by the tablets press granulation, cross sieve 60～No. 100, make its big or small uniformity; with the powder after the granulation; evenly pack in the hot pressing graphite jig with Material spreading device, graphite jig surface roughness Ra≤3.2 micron, the size of mould is 2.5～3 times of product size; send into sintering in the High Temperature High Pressure vacuum sintering furnace together with graphite jig then; in vacuum tightness less than 25Pa, 80～120 tons of press pressures, two-way pressurization is carried out under the condition of hot pressed sintering; evenly heated up 4～6 hours by room temperature; make temperature reach 2200～2300 ℃, be incubated 4～6 hours, it is depressed into 3～15 millimeters; naturally be cooled to room temperature; with the hot pressed sintering product together with graphite jig by taking out in the stove, adopt the mechanical workout mode that it is carried out grinding, reach dimension precision requirement.Lightweight norbide armor ceramic with this method is produced has the good (ρ 〉=2.5g/cm of density uniformity
3Unevenness is not more than 2%), foreign matter content is low, grain fineness number is even (grain fineness number is less than 15 microns), mechanical property (Hv 〉=3500Kg/mm
2The advantage that E 〉=380GPa) is reliable and stable can satisfy the guard technology index request of protection armour material.Have stronger society and economic benefit, have a extensive future.
Embodiment: with boron carbide powder overflow sorting classifying, after the drying, enter and be crushed in the airflow milling about 20 microns, again sorting is carried out in entry under the powder normal temperature of fragmentation, by weight ratio, extracting the granularity section is 3.5 microns, 1 part; 7 microns, 2 parts; 14 microns; 7 parts; arrange in pairs or groups; by the tablets press granulation, cross sieve No. 60, make its big or small uniformity; with the powder after the granulation; evenly pack in the hot pressing graphite jig with Material spreading device, graphite jig surface roughness Ra≤3.2 micron, the size of mould is 2.5 times of product size; send into sintering in the High Temperature High Pressure vacuum sintering furnace together with graphite jig then; in vacuum tightness less than 25P a, 100 tons of press pressures, two-way pressurization is carried out under the condition of hot pressed sintering; evenly heated up 5 hours by room temperature; make temperature reach 2250 ℃, be incubated 4 hours, it is depressed into 10 millimeters; naturally be cooled to room temperature; with the hot pressed sintering product together with graphite jig by taking out in the stove, adopt the mechanical workout mode that it is carried out grinding, reach dimension precision requirement.
Claims (2)
1, the preparation method of lightweight norbide armor ceramic, it is characterized in that, it is with boron carbide powder overflow sorting classifying, after the drying, enter and be crushed to 15～25 microns in the airflow milling, again sorting is carried out in entry under the powder normal temperature of fragmentation, by weight ratio, extracting the granularity section is 3.0～4.0 microns, 0.8～1.2 part; 6.5～7.5 microns, 1.8～2.2 parts; 13～15 microns; 6.8～7.2 parts; arrange in pairs or groups; by the tablets press granulation, cross sieve 60～No. 100, make its big or small uniformity; with the powder after the granulation; evenly pack in the hot pressing graphite jig with Material spreading device, graphite jig surface roughness Ra≤3.2 micron, the size of mould is 2.5～3 times of product size; send into sintering in the High Temperature High Pressure vacuum sintering furnace together with graphite jig then; in vacuum tightness less than 25Pa, 80～120 tons of press pressures, two-way pressurization is carried out under the condition of hot pressed sintering; evenly heated up 4～6 hours by room temperature; make temperature reach 2200～2300 ℃, be incubated 4～6 hours, it is depressed into 3～15 millimeters; naturally be cooled to room temperature; with the hot pressed sintering product together with graphite jig by taking out in the stove, adopt the mechanical workout mode that it is carried out grinding, reach dimension precision requirement.
2, the preparation method of lightweight norbide armor ceramic as claimed in claim 1, it is characterized in that, it is with boron carbide powder overflow sorting classifying, after the drying, enter and be crushed in the airflow milling about 20 microns, again sorting is carried out in entry under the powder normal temperature of fragmentation, by weight ratio, extracting the granularity section is 3.5 microns, 1 part; 7 microns, 2 parts; 14 microns; 7 parts; arrange in pairs or groups; by the tablets press granulation, cross sieve No. 60, make its big or small uniformity; with the powder after the granulation; evenly pack in the hot pressing graphite jig with Material spreading device, graphite jig surface roughness Ra≤3.2 micron, the size of mould is 2.5 times of product size; send into sintering in the High Temperature High Pressure vacuum sintering furnace together with graphite jig then; in vacuum tightness less than 25Pa, 100 tons of press pressures, two-way pressurization is carried out under the condition of hot pressed sintering; evenly heated up 5 hours by room temperature; make temperature reach 2250 ℃, be incubated 4 hours, it is depressed into 10 millimeters; naturally be cooled to room temperature; with the hot pressed sintering product together with graphite jig by taking out in the stove, adopt the mechanical workout mode that it is carried out grinding, reach dimension precision requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111597 CN1272282C (en) | 2003-04-28 | 2003-04-28 | Method for preparing lightweight boron carbide armour ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111597 CN1272282C (en) | 2003-04-28 | 2003-04-28 | Method for preparing lightweight boron carbide armour ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1541981A CN1541981A (en) | 2004-11-03 |
| CN1272282C true CN1272282C (en) | 2006-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111597 Expired - Fee Related CN1272282C (en) | 2003-04-28 | 2003-04-28 | Method for preparing lightweight boron carbide armour ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1272282C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100349824C (en) * | 2006-01-18 | 2007-11-21 | 山东大学 | Boron carbide based bulletproof composite ceramic and preparation method thereof |
| CN101337816B (en) * | 2008-08-29 | 2011-04-20 | 牡丹江金刚钻碳化硼有限公司 | Boron carbide-based composite material and preparation method thereof |
| CN101774808B (en) * | 2009-01-14 | 2013-07-03 | 郑州崟成磨料磨具有限公司 | Method for preparing boron carbide double-radian bulletproof plate |
| CN103979972B (en) * | 2014-04-09 | 2016-09-07 | 宁波东联密封件有限公司 | A kind of hot pressed sintering boron carbide bulletproof material and preparation method thereof |
| CN105254303B (en) * | 2015-11-04 | 2017-05-24 | 大连金玛硼业科技集团股份有限公司 | Multi-gradient-density boron carbide ceramic preparation method |
| CN109534827B (en) * | 2018-12-11 | 2021-03-12 | 莱芜亚赛陶瓷技术有限公司 | Pre-arranged interface hot-pressing bulletproof ceramic plate and preparation method thereof |
-
2003
- 2003-04-28 CN CN 03111597 patent/CN1272282C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1541981A (en) | 2004-11-03 |
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| C14 | Grant of patent or utility model | ||
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| CP03 | Change of name, title or address |
Address after: 157009 No. 368, Daqing street, Aimin District, Heilongjiang, Mudanjiang Patentee after: MUDANJIANG JINGANGZUAN BORON CARBIDE Co.,Ltd. Address before: 157009 No. 100, Daqing street, Mudanjiang, Heilongjiang Patentee before: MUDANJIANG DIAMOND BORON CARBI |
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| DD01 | Delivery of document by public notice |
Addressee: Liu Dongmeiluyongbin Document name: Notification of Passing Examination on Formalities |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210302 Address after: 157000 No.368 Daqing street, Aimin District, Mudanjiang City, Heilongjiang Province Patentee after: China boron Technology (Mudanjiang) Co.,Ltd. Address before: 157009 No.368 Daqing street, Aimin District, Mudanjiang City, Heilongjiang Province Patentee before: MUDANJIANG JINGANGZUAN BORON CARBIDE Co.,Ltd. |
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Effective date of registration: 20210428 Address after: 116000 room 813, free trade building, Dalian Free Trade Zone, Dalian City, Liaoning Province Patentee after: China boron Technology (Dalian) Co.,Ltd. Address before: 157000 368 Daqing street, Aimin District, Mudanjiang, Heilongjiang Patentee before: China boron Technology (Mudanjiang) Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 |