CN101608288B - Preparation method for vacuum electric contact material capable of controlling cathode spot movement - Google Patents
Preparation method for vacuum electric contact material capable of controlling cathode spot movement Download PDFInfo
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- CN101608288B CN101608288B CN2009100233212A CN200910023321A CN101608288B CN 101608288 B CN101608288 B CN 101608288B CN 2009100233212 A CN2009100233212 A CN 2009100233212A CN 200910023321 A CN200910023321 A CN 200910023321A CN 101608288 B CN101608288 B CN 101608288B
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- carbon fiber
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Abstract
The invention relates to a preparation method for vacuum electric contact materials capable of controlling cathode spot movement, which is characterized by comprising the following steps: a carbon fiber reinforcement is placed in an impregnating tank, and porous carbon/carbon prefabricated part is obtained through heating under protection of argon; the carbon fiber reinforcement is formed by arranged PAN-based continuous carbon fiber braids which are vertical to each other in a laminated way; then the porous carbon/carbon prefabricated part is placed in a graphite crucible of a vacuum infiltration furnace, and alloy infiltration agent is uniformly coated on the surface of the porous carbon/carbon prefabricated part and is melted with degassing by vacuum pumping; and the protective argon is filled into the graphite crucible of the vacuum infiltration furnace to be cooled to room temperature along with the furnace, and the vacuum electric contact materials capable of controlling the cathode spot movement can be obtained. The arc erosion resistance ability of the C-Cu complex electric contact materials prepared in the invention is remarkably better than copper-socking graphite electric contact materials which are widely applied.
Description
Technical field
The present invention relates to a kind of preparation method of vacuum electric contact material that can controlling cathode spot movement, belong to the preparation of material with specified property.
Background technology
Cathode spot is concentrated easily on cathodic electricity contact material surface and is distributed, and repeats burning, makes that the electrode material surface loss is serious, influences the normal operation of vaccum electric apparatus equipment.Carbon fiber-Cu-base composites has had advantages such as the high specific strength, low thermal coefficient of expansion of favorable conductive, thermal conductivity and the carbon fiber of copper concurrently, and possesses good arc ablation resistance and resistance fusion welding.Patent CN200710035954.6 has introduced a kind of preparation method of charcoal/composite material of carbon/carbon/copper.This patent uses vacuum pressure to ooze copper technology, has prepared charcoal/composite material of carbon/carbon/copper in short carbon fiber reinforcements.Yet the short carbon fiber in the carbon fiber-Cu-base composites of this method preparation is arranged in a jumble, is unfavorable for the motion of control cathode spot; The vacuum pressure of Cai Yonging oozes copper technology simultaneously, complex process, and to the equipment requirements height, the cost height.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of preparation method of vacuum electric contact material that can controlling cathode spot movement, can production cost low, technology is easy to control, can controlling cathode spot movement, anti-arc erosion superior performance, the vacuum electric contact material of long service life.
Technical scheme
The inventive method is characterised in that step is as follows:
Step 1: carbon fiber is strengthened body put into impregnating autoclave, under 0.01MPa, strengthen body, under argon shield, be heated to 350～800 ℃ of pyrolysis 1 hour with configuration solution submergence carbon fiber; Said process carries out 2～4 times, makes porous carbon/carbon precast body; Described carbon fiber strengthens body: PAN polyacrylonitrile-radical continuous carbon fibre knitted body according to the levels fiber each other 90 ° of stacked arrangement form carbon fibers and strengthen bodies; Described configuration solution is that heat-reactive phenolic resin, ethanol and acetone dispose solution according to 1: 1: 1 mass percent formation;
Step 2: earlier porous carbon/carbon precast body is put into the plumbago crucible of vacuum infiltration stove, then the agent of alloy infiltration evenly is placed on the prefabricated dignity of porous carbon/carbon, be evacuated to 10
-3Pa is warming up to 1000 ℃ and makes alloy infiltration agent fusing degasification, and keeping melt temperature subsequently is 1100 ℃～1200 ℃; The agent of described alloy infiltration is that mass percent 1～5%Cr, 5～10%Ti and surplus are that three kinds of alloys of Cu mix and form;
Step 3: charge into the protection argon gas to the plumbago crucible of vacuum infiltration stove, cool to room temperature with the furnace, promptly obtain can controlling cathode spot movement vacuum electric contact material.
Beneficial effect
The preparation method of a kind of vacuum electric contact material that can controlling cathode spot movement of the present invention, the C-Cu vacuum electric contact material of preparation has fine and close structure, and density can reach 7.34g/cm
3When vacuum discharge, cathode spot is along the carbon fiber sport that is parallel to the material surface unidirectional array.Regulating and controlling effect has been played in the motion of the carbon fiber anticathode spot of unidirectional array.And what the anti-arc erosion ability of the C-Cu composited contact material that the present invention is prepared significantly was better than widespread use soaks copper graphite contact material.
Description of drawings
Fig. 1 be the inventive method embodiment 1 prepared can controlling cathode spot movement the stereoscan photograph of vacuum electric contact material.
Fig. 2 be the inventive method embodiment 2 prepared can controlling cathode spot movement the vacuum discharge of vacuum electric contact material after the be corroded stereoscan photograph in zone of cathode surface.
Fig. 3 soaks the be corroded stereoscan photograph in zone of cathode surface after the vacuum discharge of copper graphite material.
Embodiment
Now in conjunction with the embodiments, accompanying drawing is further described the present invention:
Embodiment 1: will adopt heat-reactive phenolic resin as precursor according to the PAN polyacrylonitrile-radical continuous carbon fibre knitted body of [0 °/90 °] stacked arrangement as strengthening body, and it be formed according to 1: 1: 1 mass percent with ethanol, acetone dispose solution.Carbon fiber is strengthened body put into impregnating autoclave, under 0.01MPa, strengthen body, under argon shield, be heated to 350～800 ℃ of pyrolysis with configuration solution submergence carbon fiber.Make porous carbon/carbon precast body by 2 infiltration pyrolysis, porosity reaches 45%.Carbon/carbon the porous preform for preparing is put into the plumbago crucible of vacuum infiltration stove, be that the alloy infiltration agent of 5%Cr, 5%Ti and 90%Cu is placed on carbon/above the carbon porous preform again with the mass percent for preparing, vacuumize maintenance vacuum tightness≤10Pa, be warming up to 1000 ℃ of insulation 10min, make alloy infiltration agent fusing and degasification.Heat up subsequently, keep 1100 ℃～1200 ℃ of melt temperatures, the agent of alloy infiltration is fully infiltrated in the precast body.Charge into argon shield, cool to room temperature with the furnace, obtain the C-Cu vacuum electric contact material that carbon fiber is parallel to specimen surface.
Can find that from Fig. 1 stereoscan photograph the C-Cu vacuum electric contact material compact structure that this example is prepared, carbon fiber are parallel to specimen surface and arrange.
Embodiment 2: will adopt heat-reactive phenolic resin as precursor according to the PAN polyacrylonitrile-radical continuous carbon fibre knitted body of [0 °/90 °] stacked arrangement as strengthening body, and it be formed according to 1: 1: 1 mass percent with ethanol, acetone dispose solution.Carbon fiber is strengthened body put into impregnating autoclave, under 0.01MPa, strengthen body, under argon shield, be heated to 350～800 ℃ of pyrolysis with configuration solution submergence carbon fiber.Make porous carbon/carbon precast body by 3 infiltration pyrolysis, porosity reaches 38%.Carbon/carbon the porous preform for preparing is put into the plumbago crucible of vacuum infiltration stove, be that the alloy infiltration agent of 3%Cr, 8%Ti and 89%Cu is placed on carbon/above the carbon porous preform again with the mass percent for preparing, vacuumize maintenance vacuum tightness≤10Pa, be warming up to 1000 ℃ of insulation 10min, make alloy infiltration agent fusing and degasification.Heat up subsequently, keep 1100 ℃～1200 ℃ of melt temperatures, the agent of alloy infiltration is fully infiltrated in the precast body.Charge into argon shield, cool to room temperature with the furnace, obtain the C-Cu vacuum electric contact material that carbon fiber is parallel to specimen surface.
Can find from Fig. 2 stereoscan photograph, the prepared C-Cu vacuum electric contact material of this example when vacuum discharge, the direction of motion of cathode spot and carbon fiber radial parallel.Do to contrast and to find with the cathode spot movement track of copper graphite material after vacuum discharge that soak among Fig. 3, the cathode spot movement of the material that this example is prepared has directivity, illustrates that the prepared carbon fiber of this example is parallel to the adjustable cathode spot movement track of C-Cu vacuum electric contact material that specimen surface is arranged.
Can find from Fig. 2 stereoscan photograph, under the vacuum arc corrosion, carbon fiber is complete substantially, and matrix has been subjected to loss to a certain degree, the arc erosion degree of specimen surface is lighter, illustrates that prepared C-Cu vacuum electric contact material has stronger anti-arc erosion ability.
Embodiment 3: will adopt heat-reactive phenolic resin as precursor according to the PAN polyacrylonitrile-radical continuous carbon fibre knitted body of [0 °/90 °] stacked arrangement as strengthening body, and it be formed according to 1: 1: 1 mass percent with ethanol, acetone dispose solution.The carbon fiber knit body is put into impregnating autoclave, under 0.01MPa,, under argon shield, be heated to 350～800 ℃ of pyrolysis with configuration solution submergence carbon fiber knit body.Make porous carbon/carbon precast body by 4 infiltration pyrolysis, porosity reaches 32%.Carbon/carbon the porous preform for preparing is put into the plumbago crucible of vacuum infiltration stove, be that the alloy infiltration agent of 1%Cr, 10%Ti and 89%Cu is placed on carbon/above the carbon porous preform again with the mass percent for preparing, vacuumize maintenance vacuum tightness≤10Pa, be warming up to 1000 ℃ of insulation 10min, make alloy infiltration agent fusing and degas.Heat up subsequently, keep 1100 ℃～1200 ℃ of melt temperatures, the agent of alloy infiltration is fully infiltrated in the precast body.Charge into argon shield, cool to room temperature with the furnace, obtain the C-Cu vacuum electric contact material that carbon fiber is parallel to specimen surface.
Claims (1)
- One kind can controlling cathode spot movement the preparation method of vacuum electric contact material, it is characterized in that step is as follows:Step 1: carbon fiber is strengthened body put into impregnating autoclave, under 0.01MPa, strengthen body, under argon shield, be heated to 350～800 ℃ of pyrolysis 1 hour with configuration solution submergence carbon fiber; Said process carries out 2～4 times, makes porous carbon/carbon precast body; Described carbon fiber strengthens body: polyacrylonitrile-radical continuous carbon fibre knitted body according to the levels fiber each other 90 ° of stacked arrangement form carbon fibers and strengthen bodies; Described configuration solution is that heat-reactive phenolic resin, ethanol and acetone dispose solution according to 1: 1: 1 ratio formation;Step 2: earlier porous carbon/carbon precast body is put into the plumbago crucible of vacuum infiltration stove, then the agent of alloy infiltration evenly is placed on porous carbon/above the carbon precast body, be evacuated to 10 -3Pa is warming up to 1000 ℃ and makes alloy infiltration agent fusing degasification, and keeping melt temperature subsequently is 1100 ℃～1200 ℃; The agent of described alloy infiltration is that Cr, Ti and Cu mix and form, and the mass percent of alloy infiltration agent is 1～5%Cr, 5～10%Ti, and surplus is Cu;Step 3: charge into the protection argon gas to the plumbago crucible of vacuum infiltration stove, cool to room temperature with the furnace, promptly obtain can controlling cathode spot movement vacuum electric contact material.
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| CN2009100233212A CN101608288B (en) | 2009-07-14 | 2009-07-14 | Preparation method for vacuum electric contact material capable of controlling cathode spot movement |
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| CN2009100233212A CN101608288B (en) | 2009-07-14 | 2009-07-14 | Preparation method for vacuum electric contact material capable of controlling cathode spot movement |
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| CN101608288B true CN101608288B (en) | 2011-05-25 |
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| CN102800420B (en) * | 2011-05-25 | 2015-03-04 | 河南科丰新材料有限公司 | Method for manufacturing copper-tungsten contact |
| CN103779112A (en) * | 2014-01-20 | 2014-05-07 | 南通耀华机电有限公司 | Electrical contact protecting film |
| CN110983210B (en) * | 2019-09-12 | 2021-05-28 | 全球能源互联网研究院有限公司 | Carbon fiber composite copper-tungsten alloy material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152809A (en) * | 1996-09-25 | 1997-06-25 | 宝山钢铁(集团)公司 | Copper-plated carbon fibre metal graphite composite electric brush and making method |
| JP2004107162A (en) * | 2002-09-20 | 2004-04-08 | Canon Inc | Method for manufacturing carbon fiber, electron emitter having carbon fiber and image display device |
| JP2006002240A (en) * | 2004-06-21 | 2006-01-05 | Hitachi Metals Ltd | High thermal conduction-low thermal expansion composite body and its production method |
| CN1874080A (en) * | 2006-05-27 | 2006-12-06 | 合肥工业大学 | Brush in composite material of carbon fiber and graphite based on silver |
-
2009
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152809A (en) * | 1996-09-25 | 1997-06-25 | 宝山钢铁(集团)公司 | Copper-plated carbon fibre metal graphite composite electric brush and making method |
| JP2004107162A (en) * | 2002-09-20 | 2004-04-08 | Canon Inc | Method for manufacturing carbon fiber, electron emitter having carbon fiber and image display device |
| JP2006002240A (en) * | 2004-06-21 | 2006-01-05 | Hitachi Metals Ltd | High thermal conduction-low thermal expansion composite body and its production method |
| CN1874080A (en) * | 2006-05-27 | 2006-12-06 | 合肥工业大学 | Brush in composite material of carbon fiber and graphite based on silver |
Non-Patent Citations (1)
| Title |
|---|
| 胡锐,李海涛 等.Ti 对C/Cu 复合材料界面润湿及浸渗组织的影响.《中国有色金属学报》.2008,第18卷(第5期),840-844. * |
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