CN105396512A - A hexagonal tungsten nitride reaction block and a synthesis cavity - Google Patents
A hexagonal tungsten nitride reaction block and a synthesis cavity Download PDFInfo
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- CN105396512A CN105396512A CN201510914436.6A CN201510914436A CN105396512A CN 105396512 A CN105396512 A CN 105396512A CN 201510914436 A CN201510914436 A CN 201510914436A CN 105396512 A CN105396512 A CN 105396512A
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- heat resistant
- resistant layer
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Abstract
The invention relates to the field of synthesis of superhard materials and particularly relates to a hexagonal tungsten nitride reaction block and a synthesis cavity. The reaction block comprises a high-pressure heater, air cylinders, anvils, a gasket and the synthesis cavity. The air cylinders and the anvils are connected to the outer wall of the high-pressure heater. The synthesis cavity is disposed at the center of the high-pressure heater. The gasket is disposed in the space among the air cylinders, the anvils and the synthesis cavity. The air cylinders, the anvils and the synthesis cavity are disposed in the cylindrical reaction block, and tungsten nitride powder is sintered at high temperature under high pressure to obtain synthetic crystals of hexagonal tungsten nitride. The hexagonal tungsten nitride can be synthesized from the raw material powder at high temperature under high pressure. A product of the hexagonal tungsten nitride is chemically inert, and hardly reacts with metal crystals. The synthesis efficiency is increased. The synthesis cost is low.
Description
Technical field
The present invention relates to superhard material synthesis field, be specially hexagonal tungsten nitride reaction block and synthetic cavity.
Background technology
Superhard material then refers to the material that hardness can be comparable with diamond.Superhard material mainly cubic boron nitride and the diamond of current use, but also have many superhard materials to research and develop, as boron carbide, twin diamond, compound between the III such as carborundum and IV race.
Tungsten carbide is the raw material of carbide alloy family, and pure tungsten carbide is not too conventional, and tungsten carbide shape is black hexagonal, have metallic luster, hardness is close with diamond, is electricity, hot good conductor, fusing point 2870 DEG C, boiling point 6000 DEG C, relative density 15.63 (18 DEG C).Tungsten carbide is water insoluble, hydrochloric acid and sulfuric acid, is soluble in the mixed acid of nitrate acid and hydrofluoric acid.Pure tungsten carbide is frangible, if mix the metals such as a small amount of titanium, cobalt, just can reduce fragility.As the tungsten carbide of steel cutting tool, often add titanium carbide, ramet or their mixture, to improve antiknock ability.The stable chemical nature of tungsten carbide.In tungsten carbide, carbon atom embeds the gap of tungsten metal lattice, does not destroy the lattice of original metal, forms interstitial solid solution, therefore also claims calking (or insertion) compound.Tungsten carbide can be obtained by the mixture high-temperature heating of tungsten and carbon, the carrying out of the existence energy accelerated reaction of hydrogen or hydro carbons.If be prepared with the oxygenatedchemicals of tungsten, product finally must carry out application of vacuum at 1500 DEG C, to remove hydrocarbon.Tungsten carbide is suitable at high temperature carries out machining, can make the structural material, jet engine, gas turbine, nozzle etc. of cutting element, kiln.
Now, tungsten carbide (WC) is that quite outstanding high rigidity, heat resistance and chemical stability is widely used as a natural superhard material for grinding, cutting element (such as a, drill bit, milling cutter, hobboing cutter, an engine lathe pinion cutter), etc.
But, work as carbide composite material, as carbon fibre composite, be used to aircraft health etc., even if employ by tungsten carbide tool, the wearing and tearing of instrument become fierce in recent years, carbon assembly cuts the material of carbonization ferrotungsten system in the wearing character of crystal degeneration instrument and iron reaction time, because carbon assembly and iron crystal easily react, therefore, a kind of high hardness material of alternative tungsten carbide is newly needed.
Tungsten nitride W2N belongs to cubic system, and quality is hard, brown solid, and hexagonal tungsten nitride as the high hardness material of alternative tungsten carbide, and can have more superior and special function as high hardness material.
Scientific and technical personnel are carrying out the research of high nitrogen content transitional metal nitride always, also computational prediction hexagonal tungsten nitride can use as high hardness material theoretically, for alternative carbide and iron crystal combination, and have studied with the synthetic method of the hexagonal tungsten nitride powder hexagonal tungsten nitride that is main component, and a certain amount of hexagonal tungsten nitride can be synthesized.By this method, about 50 microns of the compound particle diameter of hexagonal tungsten nitride monocrystalline.This method requires very strict to synthesis condition, manufacturing cost is too high, and be difficult to batch production, widespread adoption, meanwhile, the diameter of compound particle is larger.
Summary of the invention
For the problems referred to above, the object of this invention is to provide hexagonal tungsten nitride reaction block and synthetic cavity, cylindrical reaction block inside arranges the parts such as cylinder, anvil, synthetic cavity, coordinates high temperature and high pressure environment, tungsten nitride powder is sintered, obtains the synthetic crystal of hexagonal tungsten nitride.
To achieve these goals, the present invention by the following technical solutions
Hexagonal tungsten nitride reaction block and synthetic cavity, it comprises, high-pressure heater 1, cylinder 2, anvil 3, pad 4, synthetic cavity 5; Described synthetic cavity 5 comprises, the first heat resistant layer 51, second heat resistant layer 52, outer shroud 53, the 3rd heat resistant layer 54, inner ring 55, pyrophillite cylinder 56, interior filling chamber 57, outer filling chamber 58, raw material capsule 59, raw meal 510, carbon heater 511.
Described high-pressure heater 1 inside is provided with cylinder 2, anvil 3, described cylinder 2, anvil 3 is arranged in pairs, described cylinder 2, anvil 3 is connected with high-pressure heater 1 outer wall, described high-pressure heater 1 center is provided with synthetic cavity 5, described cylinder 2, anvil 3, pad 4 is provided with between the space between synthetic cavity 5 three, described pyrophillite cylinder about 56 two ends are all provided with the first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54, described second heat resistant layer 52 two ends are provided with outer shroud 53, described first heat resistant layer 51, 3rd heat resistant layer 54 is connected with pyrophillite cylinder 56 inwall, described outer shroud 53 is connected with pyrophillite cylinder 56 inwall, described first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54 connects successively, described pyrophillite cylinder 56 inside is provided with outer filling chamber 58, the position at 58 4 angles, described outer filling chamber is provided with inner ring 55, inside, described outer filling chamber 58 is provided with carbon heater 511, described carbon heater 511 is connected with the 3rd heat resistant layer 54, described carbon heater 511 inside is provided with interior filling chamber 57, inside, described interior filling chamber 57 is provided with raw material capsule 59, described raw material capsule 59 inside is provided with raw meal 510.
The shape of described high-pressure heater 1 is cylinder.
The shape of described synthetic cavity 5 is cuboid.
Filler in described interior filling chamber 57, outer filling chamber 58 is the zirconia of physiological saline and 10% proportion.
The heating-up temperature that described carbon heater 511 can provide is 1200-2600 DEG C.
Described raw meal 510 is tungsten nitride particulate, and particle diameter is 20 microns to 1 micron.
Beneficial effect of the present invention
1, the present invention in the course of the work, and arranging raw material powder carries out under high pressure-temperature, can synthesize hexagonal tungsten nitride.
2, the tungsten nitride that the present invention produces has better chemical inertness, does not substantially react with metallic crystal.
3, the agglomerate of hexagonal tungsten nitride has better structural stability and mar proof.
4, reaction block improves the Upon Cooperative Efficiency of hexagonal tungsten nitride, reduces cost.
5, because superhard material is difficult to be worked into required shape, size, and the present invention is sintering synthesised polycrystalline body hexagonal tungsten nitride crystal, and when sintering, direct forming is required shape and size.
Accompanying drawing explanation
Fig. 1 is the structural representation of reaction block of the present invention;
Fig. 2 is the structural representation of synthetic cavity of the present invention.
In its figure: 1-high-pressure heater, 2-cylinder, 3-anvil, 4-pad, 5-synthetic cavity; 51-the first heat resistant layer, the 52-the second heat resistant layer, 53-outer shroud, the 54-the three heat resistant layer, 55-inner ring, 56-pyrophillite cylinder, 57-interior filling chamber, 58-fill chamber outward, 59-raw material capsule, 510-raw meal, 511-carbon heater.
Detailed description of the invention
For the problems referred to above, the object of this invention is to provide hexagonal tungsten nitride reaction block and synthetic cavity, cylindrical reaction block inside arranges the parts such as cylinder, anvil, synthetic cavity, coordinates high temperature and high pressure environment, tungsten nitride powder is sintered, obtains the synthetic crystal of hexagonal tungsten nitride.
Hexagonal tungsten nitride reaction block and synthetic cavity, it comprises, high-pressure heater 1, cylinder 2, anvil 3, pad 4, synthetic cavity 5; Described synthetic cavity 5 comprises, the first heat resistant layer 51, second heat resistant layer 52, outer shroud 53, the 3rd heat resistant layer 54, inner ring 55, pyrophillite cylinder 56, interior filling chamber 57, outer filling chamber 58, raw material capsule 59, raw meal 510, carbon heater 511.
Described high-pressure heater 1 inside is provided with cylinder 2, anvil 3, described cylinder 2, anvil 3 is arranged in pairs, described cylinder 2, anvil 3 is connected with high-pressure heater 1 outer wall, described high-pressure heater 1 center is provided with synthetic cavity 5, described cylinder 2, anvil 3, pad 4 is provided with between the space between synthetic cavity 5 three, described pyrophillite cylinder about 56 two ends are all provided with the first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54, described second heat resistant layer 52 two ends are provided with outer shroud 53, described first heat resistant layer 51, 3rd heat resistant layer 54 is connected with pyrophillite cylinder 56 inwall, described outer shroud 53 is connected with pyrophillite cylinder 56 inwall, described first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54 connects successively, described pyrophillite cylinder 56 inside is provided with outer filling chamber 58, the position at 58 4 angles, described outer filling chamber is provided with inner ring 55, inside, described outer filling chamber 58 is provided with carbon heater 511, described carbon heater 511 is connected with the 3rd heat resistant layer 54, described carbon heater 511 inside is provided with interior filling chamber 57, inside, described interior filling chamber 57 is provided with raw material capsule 59, described raw material capsule 59 inside is provided with raw meal 510.
The shape of described high-pressure heater 1 is cylinder.
The shape of described synthetic cavity 5 is cuboid.
Filler in described interior filling chamber 57, outer filling chamber 58 is the zirconia of physiological saline and 10% proportion.
The heating-up temperature that described carbon heater 511 can provide is 1200-2600 DEG C.
Described raw meal 510 is tungsten nitride particulate, and particle diameter is 10 microns.
Below in conjunction with drawings and Examples, the present invention is described in further details
As Fig. 1, shown in Fig. 2, described high-pressure heater 1 inside is provided with cylinder 2, anvil 3, described cylinder 2, anvil 3 is arranged in pairs, described cylinder 2, anvil 3 is connected with high-pressure heater 1 outer wall, described high-pressure heater 1 center is provided with synthetic cavity 5, described cylinder 2, anvil 3, pad 4 is provided with between the space between synthetic cavity 5 three, described pyrophillite cylinder about 56 two ends are all provided with the first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54, described second heat resistant layer 52 two ends are provided with outer shroud 53, described first heat resistant layer 51, 3rd heat resistant layer 54 is connected with pyrophillite cylinder 56 inwall, described outer shroud 53 is connected with pyrophillite cylinder 56 inwall, described first heat resistant layer 51, second heat resistant layer 52, 3rd heat resistant layer 54 connects successively, described pyrophillite cylinder 56 inside is provided with outer filling chamber 58, the position at 58 4 angles, described outer filling chamber is provided with inner ring 55, inside, described outer filling chamber 58 is provided with carbon heater 511, described carbon heater 511 is connected with the 3rd heat resistant layer 54, described carbon heater 511 inside is provided with interior filling chamber 57, inside, described interior filling chamber 57 is provided with raw material capsule 59, described raw material capsule 59 inside is provided with raw meal 510.
The shape of described high-pressure heater 1 is cylinder, and the shape of described synthetic cavity 5 is cuboid.
Filler in described interior filling chamber 57, outer filling chamber 58 is the zirconia of physiological saline and 10% proportion.
The heating-up temperature that described carbon heater 511 can provide is 1200-2600 DEG C, and the reaction temperature of synthetic cavity can not lower than 1200 DEG C, and different temperature and pressure conditions, the sintering degree of hexagonal tungsten nitride is also different.
Described raw meal 510 is tungsten nitride particulate, and particle diameter is 20 microns or less, and particle diameter is less, and the hexagonal tungsten nitride sintering degree obtained under equal conditions is higher.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (5)
1. hexagonal tungsten nitride reaction block and synthetic cavity, is characterized in that, it comprises, high-pressure heater (1), cylinder (2), anvil (3), pad (4), synthetic cavity (5); Synthetic cavity (5) comprises, first heat resistant layer (51), the second heat resistant layer (52), outer shroud (53), 3rd heat resistant layer (54), inner ring (55), pyrophillite cylinder (56), interior filling chamber (57), outer filling chamber (58), raw material capsule (59), raw meal (510), carbon heater (511);
Described high-pressure heater (1) inside is provided with cylinder (2), anvil (3), described cylinder (2), anvil (3) is arranged in pairs, described cylinder (2), anvil (3) is connected with high-pressure heater (1) outer wall, described high-pressure heater (1) center is provided with synthetic cavity (5), described cylinder (2), anvil (3), pad (4) is provided with between the space between synthetic cavity (5) three, described pyrophillite cylinder (56) is all provided with the first heat resistant layer (51) in two ends up and down, second heat resistant layer (52), 3rd heat resistant layer (54), described second heat resistant layer (52) two ends are provided with outer shroud (53), described first heat resistant layer (51), 3rd heat resistant layer (54) is connected with pyrophillite cylinder (56) inwall, described outer shroud (53) is connected with pyrophillite cylinder (56) inwall, described first heat resistant layer (51), second heat resistant layer (52), 3rd heat resistant layer (54) connects successively, described pyrophillite cylinder (56) inside is provided with outer filling chamber (58), the position at (58) four angles, described outer filling chamber is provided with inner ring (55), described outer filling chamber (58) inside is provided with carbon heater (511), described carbon heater (511) is connected with the 3rd heat resistant layer (54), described carbon heater (511) inside is provided with interior filling chamber (57), described interior filling chamber (57) inside is provided with raw material capsule (59), described raw material capsule (59) inside is provided with raw meal (510).
2. hexagonal tungsten nitride reaction block according to claim 1 and synthetic cavity, is characterized in that, the shape of described high-pressure heater (1) is cylinder; The shape of described synthetic cavity (5) is cuboid.
3. hexagonal tungsten nitride reaction block according to claim 1 and synthetic cavity, is characterized in that, the filler in described interior filling chamber (57), outer filling chamber (58) is the zirconia of physiological saline and 10% proportion.
4. hexagonal tungsten nitride reaction block according to claim 1 and synthetic cavity, is characterized in that, the heating-up temperature that described carbon heater (511) can provide is 1200-2600 DEG C.
5. hexagonal tungsten nitride reaction block according to claim 1 and synthetic cavity, is characterized in that, described raw meal (510) is tungsten nitride particulate, and particle diameter is 20 microns to 1 micron.
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| CN201510914436.6A CN105396512B (en) | 2015-12-13 | 2015-12-13 | Hexagonal tungsten nitride reaction block |
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| CN201510914436.6A CN105396512B (en) | 2015-12-13 | 2015-12-13 | Hexagonal tungsten nitride reaction block |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604106A (en) * | 1984-04-16 | 1986-08-05 | Smith International Inc. | Composite polycrystalline diamond compact |
| CN201537480U (en) * | 2009-08-11 | 2010-08-04 | 郑州中南杰特超硬材料有限公司 | Cubic boron nitride high-pressure synthesizer |
| CN202199324U (en) * | 2011-07-15 | 2012-04-25 | 河南富耐克超硬材料股份有限公司 | Reaction chamber and reaction block for superhard material |
| CN204656490U (en) * | 2015-05-25 | 2015-09-23 | 北京富成国际金刚石技术有限公司 | A kind of package assembly of synthesizing multi-disc diamond or cubic boron nitride composite piece |
| CN104959080A (en) * | 2015-07-13 | 2015-10-07 | 吉林师范大学 | Chamber assembly for synthesizing diamond and cubic boron nitride sintered body and assembling method |
-
2015
- 2015-12-13 CN CN201510914436.6A patent/CN105396512B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604106A (en) * | 1984-04-16 | 1986-08-05 | Smith International Inc. | Composite polycrystalline diamond compact |
| CN201537480U (en) * | 2009-08-11 | 2010-08-04 | 郑州中南杰特超硬材料有限公司 | Cubic boron nitride high-pressure synthesizer |
| CN202199324U (en) * | 2011-07-15 | 2012-04-25 | 河南富耐克超硬材料股份有限公司 | Reaction chamber and reaction block for superhard material |
| CN204656490U (en) * | 2015-05-25 | 2015-09-23 | 北京富成国际金刚石技术有限公司 | A kind of package assembly of synthesizing multi-disc diamond or cubic boron nitride composite piece |
| CN104959080A (en) * | 2015-07-13 | 2015-10-07 | 吉林师范大学 | Chamber assembly for synthesizing diamond and cubic boron nitride sintered body and assembling method |
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Inventor after: Wu Zeyu Inventor after: Shi Yanhong Inventor after: Lian Xinlan Inventor before: Lian Xinlan Inventor before: Mao Baozhan |
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Effective date of registration: 20170807 Address after: 450045 Zhengzhou Jinshui District, Henan, North Ring Road, No. 36 Applicant after: North University of Water Resource and Electric Power Address before: 450007 Henan Province, Zhengzhou City Road, No. 37 volt cow Road, building No. 14, No. 156 Applicant before: HENAN GUANGDU SUPERHARD MATERIAL CO., LTD. |
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