CN1184794A - Carbon-carbon composition material for electric collection - Google Patents
Carbon-carbon composition material for electric collection Download PDFInfo
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- CN1184794A CN1184794A CN97106647A CN97106647A CN1184794A CN 1184794 A CN1184794 A CN 1184794A CN 97106647 A CN97106647 A CN 97106647A CN 97106647 A CN97106647 A CN 97106647A CN 1184794 A CN1184794 A CN 1184794A
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Abstract
The carbon-carbon composite material uses copper plated carbon powder as basic material, adopts short carbon fiber as reinforcing agent, adopts thermo setting resin as binder, after wet mixing or dry mixing, the material is formed into shape by cold pressing or hot pressing. The obtd. composite material can be used as electric connection sliding block in electric locomotive, trolleybus and other places.
Description
The present invention is a kind of novel current collection carbon fibre-reinforced carbon composite material, can be applied to the use occasion that electric locomotive pantograph sliding plate, trolley bus are subjected to electric slide block and other current collections, belongs to the Division of Chemistry technical field of composite materials.
Aspect current collection, use more material to mainly contain metallic substance, mmaterial and carbonaceous material etc. at present.The metal current-collecting member adopts copper, steel, aluminium etc. to make, and has intensity height, good toughness, that wear resisting property is good, resistivity is little etc. is excellent, but its arc resistance can be poor, and is too big to the wearing and tearing of friction pair material.This metalloid current-collecting member is only applicable to the extra high application scenario of intensity at present.It is matrix that the powder metallurgy current-collecting member mainly adopts copper original washing powder or ferrous alloy powder, and add other metal powders and the non-metal powder compacting sintering forms, its physical strength height, good toughness, shock resistance are strong, rupture in the use, fall piece, eccentric wear phenomenon seldom, but it is very serious to the wearing and tearing of copper friction pair, and electric arc in use easily takes place, and not only increased mechanical wear and arc wear, also disturb tick.Carbonaceous current-collecting member lubricity, anti-attrition performance and arc resistance can be good, in light weight, noise is little, when contact with friction pair on friction pair formation one deck carbon film, improved wearing and tearing greatly to friction pair.Simultaneously, it has excellent contact stability, interference to wireless and TV is minimum, but the wear resisting property of carbonaceous material is poor, physical strength is low, easily crisp, easily fall piece and fracture, work-ing life is low, the intrinsic resistance of carbonaceous material is big simultaneously, contact drop is higher, also because of the fluctuation of various factors in producing, makes carbonaceous current-collecting member performance inhomogeneous.
From data searching, developed a kind of novel current-collecting member since the eighties: metal-impregnated carbon.This is that some metals penetrate in the pore of carbon material with carbon back material impregnating metal under High Temperature High Pressure, constitutes fine and closely woven reticulated structure in carbon.The compactness of this material is good, and its intensity, toughness and wear resistance are better than matrix carbon, Heat stability is good, and coefficient of thermal expansion is lower, and thermal conductivity and electric conductivity are higher, to not melting welding of lead, are-tight property height, contact resistance is little.But, this material manufacturing process complexity, cost is higher, and is bigger to the wearing and tearing of copper, and shock resistance is relatively poor.The carbon-metal composite material sliding collecting material that also has a kind of Japanese Patent to publish, this matrix material strengthens carbon base body with steel fiber, metal-powder, wire cloth or their mixture, adopt suitable mixing method that toughener is distributed among the subbase body uniformly, cold pressing then or hot pressing, obtain matrix material through behind the high temperature sintering again.The mechanical property of this material and conductivity are all relatively good, but if the damage of toughener, and the conductivity of matrix material can severe exacerbation, and since metal in carbon base body with bigger distribution of sizes, more serious to the wearing and tearing of copper.
Purpose of the present invention just is at defective of the prior art, research and propose a kind of novel current collecting composite material, be primarily aimed at the copper friction pair, make this matrix material on the basis that keeps carbonaceous material excellent friction polishing machine, improve its mechanical property and conductivity.
Technical solution of the present invention is: with the coppered carbon material powder is matrix, adopt short carbon fiber as toughener, adopt thermosetting resin as binding agent, adopt hygrometric state to mix or dry state blended method, with the raw material thorough mixing, cold pressing then and (or) hot pressing, obtain required matrix material.
Coppered carbon powder body material used in the present invention comprises copper coated graphite powder and copper facing coke powder, and the copper content of copper facing powder can be adjusted as required at 20%-80%.The granularity of copper facing powder is less than 0.2mm.Carbon fiber reinforcement adopts length less than 5mm, the diameter carbon fiber smaller or equal to 20 μ m, and its weight percent is 1-25%; Binding agent uses thermosetting resin, and as resol, its consumption is 3-25%.
The mixing of raw material can be divided into hygrometric state mixing and dry state mixing according to the difference that binding agent adds state.Mixing process must guarantee uniform mixing between each feed composition.
The moulding of matrix material use cold pressing and (or) heat pressing process.Employing is colded pressing or is adopted hot pressing, perhaps adopts to cold pressing to add hot pressing, can be decided according to the actual requirements.Cold pressing pressure more than or equal to 150MPa, and the time is more than or equal to 30s.Can determine whether solvent impregnated resin according to the service requirements of material after the coldmoulding, solvent impregnated resin can improve the density and the mechanical property of matrix material, and the pressure of solvent impregnated resin is more than or equal to 0.3MPa, and the time was more than or equal to 1 hour.Hot pressing pressure is not less than 100MPa, and temperature 50-300 ℃, the time that keep-ups pressure is more than or equal to 60s.Can carry out solvent impregnated resin to material as required after the hot pressing handles and sintering processes.50-300 ℃ of sintering processes temperature, the time was more than or equal to 5 hours.
Further specify technology contents of the present invention below by several embodiment.
Embodiment 1: use 10% carbon fiber, and 5% resol and solidifying agent, all the other are copper facing carbonaceous powder (containing 30% bronze medal), adopt the dry state mixing method, cold pressing under the pressure of 350MPa 5 minutes, then 170 ℃ sintering temperature 30 hours.The resistivity of the matrix material that obtains is 5.7 μ Ω m, Shore hardness 48, ultimate compression strength 70MPa.This material can be used to make electrical contact etc.
Embodiment 2: use 2% carbon fiber, and 10% resol and solidifying agent, all the other are copper facing carbonaceous powder (containing 80% bronze medal), adopt the dry state mixing method, hot pressing is 5 minutes under the temperature of the pressure of 200MPa and 170 ℃.The resistivity of this matrix material is 1.75 μ Ω m, Shore hardness 70, ultimate compression strength 85MPa.This material can be used to make driving current collection pulley, slide block etc.
Embodiment 3: use 5% carbon fiber, and 22% resol and solidifying agent, all the other are copper facing carbonaceous powder (containing 55% bronze medal), adopt the hygrometric state mixing method, hot pressing is 10 minutes under the temperature of the pressure of 245MPa and 180 ℃.The resistivity of material is 15 μ Ω m, Shore hardness 107, ultimate compression strength 134MPa.This material can be used to make trolley bus current collection slide block etc.
Embodiment 4: use 10% carbon fiber, 15% resol and solidifying agent, all the other are copper facing carbonaceous powder (containing 60% bronze medal), adopt the hygrometric state mixing method, at first under the pressure of 270MPa, colded pressing 1.5 minutes, hot pressing 7 minutes under the temperature of the pressure of 270MPa and 180 ℃ then is at last 150 ℃ sintering temperature 20 hours.The composite material resistance rate that obtains is 5.8 μ Ω m, and ultimate compression strength 123MPa, Charpy's impact value are 0.44J/cm
2This material can be used to make use for electric locomotive pantograph pan etc.
The matrix material of the present invention preparation has excellent friction and wear behavior, to the degree of wear of copper friction pair be that carbonaceous current-collecting member institute is inaccessiable for a short time, and compare with the carbonaceous current-collecting member, conductivity and mechanical property are significantly improved.Use this matrix material can make the good current collection component of over-all properties.
Claims (5)
1, a kind of current collection carbon fibre-reinforced carbon composite material, it is characterized in that with copper content being that the coppered carbon powder of 20%-80% is a body material, adopting weight percent is that the short carbon fiber of 1-25% is a toughener, and adopting consumption is that the thermosetting resin of 3-25% is as binding agent.
2, a kind of as the manufacture method of the said current collection of claim 1 with carbon fibre-reinforced carbon composite material, it is characterized in that after mixing of raw material hygrometric state or the dry state mixing, use cold pressing and (or) hot-forming, cold pressing pressure more than or equal to 150MPa, hold-time is more than or equal to 30s, hot pressing pressure is not less than 100MPa, and temperature 50-300 ℃, the time that keep-ups pressure is more than or equal to 60s.
3, a kind of as the said current collection carbon fibre-reinforced carbon composite material of claim 1, it is characterized in that said coppered carbon powder comprises copper coated graphite powder and copper facing coke powder, the granularity of copper facing powder is less than 0.2mm, short carbon fiber adopts length less than 5mm, diameter is smaller or equal to the carbon fiber of 20 μ m, and thermosetting resin adopts resol.
4, a kind of as the manufacture method of the said current collection of claim 2 with carbon fibre-reinforced carbon composite material, solvent impregnated resin again after it is characterized in that colding pressing, its pressure is more than or equal to 0.3MPa, and the time was more than or equal to 1 hour.
5, a kind of as the manufacture method of the said current collection of claim 2 with carbon fibre-reinforced carbon composite material, it is characterized in that hot pressing carries out sintering processes later on again, its temperature is 50-300 ℃, the time was more than or equal to 5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97106647A CN1061960C (en) | 1997-10-07 | 1997-10-07 | Carbon-carbon composition material for electric collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97106647A CN1061960C (en) | 1997-10-07 | 1997-10-07 | Carbon-carbon composition material for electric collection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1184794A true CN1184794A (en) | 1998-06-17 |
| CN1061960C CN1061960C (en) | 2001-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97106647A Expired - Fee Related CN1061960C (en) | 1997-10-07 | 1997-10-07 | Carbon-carbon composition material for electric collection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326152C (en) * | 2005-07-08 | 2007-07-11 | 山东大学 | Pantograph sliding plate of assorted fibre reinforced composite material and preparing method thereof |
| CN101641174B (en) * | 2007-03-21 | 2011-07-13 | 霍加纳斯股份有限公司 | Powder metal polymer composites |
| CN110372409A (en) * | 2019-08-08 | 2019-10-25 | 苏州山人纳米科技有限公司 | Nano-cellulose enhances graphite material fast preparation method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5155661A (en) * | 1974-11-12 | 1976-05-15 | Fujitsu Ltd | |
| DE260217T1 (en) * | 1986-09-10 | 1988-07-21 | United Technologies Corp., Hartford, Conn. | MOLDING PROCESS FOR COAL-CARBON COMPOSITE. |
| CN1075031A (en) * | 1992-01-29 | 1993-08-04 | 北京航空航天大学 | Carbon-carbon composite electrode battery and manufacturing process thereof |
| CN1136541A (en) * | 1995-05-24 | 1996-11-27 | 邱长埙 | Method for producing carbon-carbon composite material |
| CN1058980C (en) * | 1996-01-30 | 2000-11-29 | 中国科学院山西煤炭化学研究所 | Carbon/carbon composite sealing material and its preparing method |
-
1997
- 1997-10-07 CN CN97106647A patent/CN1061960C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326152C (en) * | 2005-07-08 | 2007-07-11 | 山东大学 | Pantograph sliding plate of assorted fibre reinforced composite material and preparing method thereof |
| CN101641174B (en) * | 2007-03-21 | 2011-07-13 | 霍加纳斯股份有限公司 | Powder metal polymer composites |
| CN110372409A (en) * | 2019-08-08 | 2019-10-25 | 苏州山人纳米科技有限公司 | Nano-cellulose enhances graphite material fast preparation method |
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| Publication number | Publication date |
|---|---|
| CN1061960C (en) | 2001-02-14 |
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Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD |
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Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Co-patentee after: SHANGHAI JIAO TONG University Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Co-patentee before: Shanghai Jiao Tong University Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Co-patentee after: SHANGHAI JIAO TONG University Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Address before: 201900 Middle Road, Baoshan District, Shanghai Co-patentee before: Shanghai Jiao Tong University Patentee before: Baosteel Group Corporation |
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