CN101148102B - Carbon-base tungsten coating and its preparation method - Google Patents
Carbon-base tungsten coating and its preparation method Download PDFInfo
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- CN101148102B CN101148102B CN2007101351096A CN200710135109A CN101148102B CN 101148102 B CN101148102 B CN 101148102B CN 2007101351096 A CN2007101351096 A CN 2007101351096A CN 200710135109 A CN200710135109 A CN 200710135109A CN 101148102 B CN101148102 B CN 101148102B
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- carbon
- coating
- tungsten
- tungsten coating
- base
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- 238000000576 coating method Methods 0.000 title claims abstract description 43
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 43
- 229910052721 tungsten Inorganic materials 0.000 title claims description 42
- 239000010937 tungsten Substances 0.000 title claims description 42
- 238000002360 preparation method Methods 0.000 title claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000151 deposition Methods 0.000 claims abstract description 7
- 230000008021 deposition Effects 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 35
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 10
- 238000005275 alloying Methods 0.000 claims description 8
- 244000137852 Petrea volubilis Species 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 5
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract 6
- 238000004062 sedimentation Methods 0.000 description 6
- 238000005240 physical vapour deposition Methods 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000948897 Ploceus cucullatus Species 0.000 description 1
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
The composite material comprising one C substrate and one homogeneous compact W coating attached firmly on the C substrate. The C substrate is preferably of composite C/C material or graphite, and the W coating is formed through deposition with purified W plate as target. The present invention has the advantages of high W coating depositing speed, complete coating of all surfaces of C substrate with W coating formed by high density plasma cloud between the W target and the C substrate, compact W coating without crack, and well combination between the W coating and the C substrate.
Description
Technical field
The present invention relates to a kind of tungsten coating and preparation method thereof, especially relate to a kind of carbon-base tungsten coating and preparation method thereof.
Background technology
Tungsten is because its high-melting-point, good heat conductivility, low sputtering yield and height from sputter threshold values and low-vapor pressure and low tritium retention performance, are considered to the most promising plasma wall surface material of facing of following fusion reactor.But tungsten and alloy thereof are very heavy and be difficult to processing, so the light element material, are extensively adopted by the fusion scientist of countries in the world institute as the tungsten coating on the material with carbon element.Carried out the limiter and the test of divertor baffle of tungsten coating on ASDEX-U and TEXTOR tokamak device, large-area W/C first wall tile hanging test is also carried out on ASDEX-U, and test finds between tungsten and the plasma compatibility is preferably arranged.
At present, the preparation method of coating mainly contains plasma spray coating, physical vapour deposition (PVD) and the chemical vapour deposition (CVD) etc. of vacuum plasma spray, inert gas shielding.Physical vapour deposition (PVD) and chemical vapor deposited coatings not only have high density and purity, and be columnar grain structure perpendicular to the surface, this point is useful for high hot-fluid parts, but its high density is unfavorable for the release of stress, and crackle will be in case formation will be easy to expansion.And that plasma spray coating has technology is simple, cost is lower and be not subjected to the restriction of workpiece shape to reach quite good advantages such as high heat load performance, its shortcoming is that density and purity are all lower, adhesion between grain-boundary strength and sprayed particle is relatively poor, the macroparticle emission identical with carbon-based material under the effect of transient state high heat load, can occur, cause the serious and harmful impurity ash of material corrosion to be accumulated in the plasma with fragility carbon.On the other hand, the relatively low density of coating will help the release of stress, form so-called crackle and capture mechanism.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of carbon-base tungsten coating, it is characterized in that comprising carbon base body and tungsten coating two parts, even compact and have certain thickness tungsten coating securely attached to the carbon base body surface.Material with carbon element is preferentially selected carbon/carbon composite and graphite as matrix.
Another technical problem that the present invention will solve provides a kind of preparation method of carbon-base tungsten coating, it is characterized in that adopting two brightness plasma heating furnaces to be prepared, and comprises the step of following order:
(1) carbon material surface is handled and ultrasonic cleaning with crystalline phase sand paper, afterwards oven dry.
(2) carbon base body is put on two brightness stove negative electrodes, vacuumized the feeding argon gas, cathode voltage is adjusted to 300-350V, heated wash carbon base body 0.5h-2h.
(3) blow-on was put into the tungsten plate on two brightness stove source electrodes, and distance be 10mm～20mm between tungsten target and the material with carbon element, and the pass stove vacuumizes the feeding argon gas, according to the double glow plasma surface alloying process parameter that configures 2 hours～10 hours.
(4), the carbon-base tungsten coating for preparing was carried out high-temperature process 0.5 hour～2 hours at 1000 ℃-1300 ℃ according to demand.
The invention has the advantages that: (1) tungsten coating deposition velocity is very fast, has improved the efficient of coating preparation greatly.(2) produce highdensity plasma cloud between tungsten target and the carbon base body, a large amount of tungsten atoms not only covers the carbon base body surface, and tungsten coating has also been wrapped at the side of matrix and the back side attached.Crackle does not appear in (3) coating surface densification.(4) coating and matrix of carbon/carbon composite materials are in conjunction with better.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
Select for use carbon/carbon composite as matrix, set the technological parameter that adopts double glow plasma surface alloying technique deposits tungsten coating: source voltage 950V, cathode voltage 500V, air pressure 50Pa, spacing 15mm, dutycycle 0.8, sedimentation time 4h.The carbon/carbon composite surface is handled and ultrasonic cleaning with crystalline phase sand paper, and oven dry is afterwards put on two brightness stove negative electrodes, vacuumizes the feeding argon gas, and cathode voltage is adjusted to 350V heated wash matrix of carbon/carbon composite materials 0.5 hour.Blow-on is put into the tungsten plate on two brightness stove source electrodes, close stove, vacuumize the feeding argon gas, carry out (comprising source voltage, cathode voltage, air pressure, die opening, dutycycle, sedimentation time) deposition of tungsten coating according to the double glow plasma surface alloying process parameter that configures; With the carbon-base tungsten coating for preparing at 1300 ℃ of high-temperature heat treatment 1h.
Embodiment 2
Select for use graphite as matrix, set the technological parameter that adopts double glow plasma surface alloying technique deposits tungsten coating: source voltage 950V, cathode voltage 450V, air pressure 40Pa, die opening 10mm, dutycycle 0.6, sedimentation time 6h.Graphite surface is handled and ultrasonic cleaning with crystalline phase sand paper, and oven dry is afterwards put on two brightness stove negative electrodes, vacuumizes the feeding argon gas, and cathode voltage is adjusted to 300V heated wash graphite matrix 1h.Blow-on is put into the tungsten plate on two brightness stove source electrodes, close stove, vacuumize the feeding argon gas, carry out (comprising source voltage, cathode voltage, air pressure, die opening, dutycycle, sedimentation time) deposition of tungsten coating according to the double glow plasma surface alloying process parameter that configures.With the carbon-base tungsten coating for preparing 1200 ℃ of high-temperature heat treatment 0.5 hour.
Embodiment 3
Select for use carbon/carbon composite as matrix, set the technological parameter that adopts double glow plasma surface alloying technique deposits tungsten coating: source voltage 850V, cathode voltage 550V, air pressure 50Pa, die opening 20mm, dutycycle 0.8, sedimentation time 2h.The carbon/carbon composite surface is handled and ultrasonic cleaning with crystalline phase sand paper, and oven dry is afterwards put on two brightness stove negative electrodes, vacuumizes the feeding argon gas, and cathode voltage is adjusted to 350V heated wash matrix of carbon/carbon composite materials 1.5h.Blow-on is put into the tungsten plate on two brightness stove source electrodes, close stove, vacuumize the feeding argon gas, carry out (comprising source voltage, cathode voltage, air pressure, die opening, dutycycle, sedimentation time) deposition of tungsten coating according to the double glow plasma surface alloying process parameter that configures; With the carbon-base tungsten coating for preparing at 1200 ℃ of high-temperature heat treatment 2h.
Claims (5)
1. the preparation method of a carbon-base tungsten coating is characterized in that adopting two brightness plasma heating furnaces, comprises the step of following order:
(1) carbon material surface is handled and ultrasonic cleaning with crystalline phase sand paper, afterwards oven dry;
(2) carbon base body is put on two brightness stove negative electrodes, vacuumized the feeding argon gas, cathode voltage is adjusted to 300-350V, heated wash carbon base body 0.5h-2h;
(3) blow-on is put into the tungsten plate on two brightness stove source electrodes, closes stove, vacuumizes the feeding argon gas, according to the double glow plasma surface alloying process parameter that configures, carries out the tungsten coating deposition with the tungsten plate as target;
(4) carbon-base tungsten coating for preparing was carried out high-temperature process 0.5 hour～2 hours at 1000 ℃-1300 ℃.
2. according to the described preparation method of claim 1, it is characterized in that the distance between material with carbon element and the tungsten target is 10mm～20mm.
3. the carbon-base tungsten coating by the preparation of the described method of claim 1 is characterized in that comprising carbon base body and tungsten coating two parts, even compact and have certain thickness tungsten coating securely attached to the carbon base body surface.
4. according to the described carbon-base tungsten coating of claim 3, it is characterized in that material with carbon element is as matrix.
5. according to the described carbon-base tungsten coating of claim 4, it is characterized in that described material with carbon element is carbon/carbon composite or graphite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101351096A CN101148102B (en) | 2007-11-08 | 2007-11-08 | Carbon-base tungsten coating and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101351096A CN101148102B (en) | 2007-11-08 | 2007-11-08 | Carbon-base tungsten coating and its preparation method |
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| CN101148102A CN101148102A (en) | 2008-03-26 |
| CN101148102B true CN101148102B (en) | 2011-04-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445391B (en) * | 2008-12-23 | 2011-04-27 | 南京航空航天大学 | Method for infiltrating tungsten carbide on the surface of carbon material |
| CN103352222B (en) * | 2013-06-24 | 2016-03-02 | 核工业西南物理研究院 | A kind of preparation method of the carbon-base tungsten coating for tokamak device |
| CN103352200B (en) * | 2013-06-25 | 2015-11-25 | 南京航空航天大学 | Surface deposition has the preparation method of the diamond particles of WC/W compound coating |
| CN104419905A (en) * | 2013-08-21 | 2015-03-18 | 核工业西南物理研究院 | Preparation method of carbon-based multilayer composite coating |
| CN104307511A (en) * | 2014-11-03 | 2015-01-28 | 太仓派欧技术咨询服务有限公司 | Preparation method of carbon-based tungsten coating catalyst |
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2007
- 2007-11-08 CN CN2007101351096A patent/CN101148102B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| Garcia-Rosales C， et al..High-heat-flux loading of tungsten coatings on graphite deposited by plasma spray and physical vapor deposition.《Fusion Technology》.1997,第32卷263-275. * |
| JP特开2004-288549A 2004.10.14 |
| 刘翔 等.碳基钨涂层在退火过程中的组织和结构变化.《金属热处理》.2003,第28卷(第12期),1-4. |
| 刘翔等.碳基钨涂层在退火过程中的组织和结构变化.《金属热处理》.2003,第28卷(第12期),1-4. * |
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