CN104162656A - Method for preparing copper-based Al2O3 composite powder through activated carbon in-situ internal oxidation - Google Patents
Method for preparing copper-based Al2O3 composite powder through activated carbon in-situ internal oxidation Download PDFInfo
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Abstract
The invention relates to the field of metal materials and discloses a method for preparing copper-based Al2O3 composite powder through activated carbon in-situ internal oxidation. Aluminum containing copper oxide powder including CuO, Cu2O and Al2O3 fully pre-oxidized directly with air undergoes a chain reaction within a certain temperature range in a closed space with activated carbon at micro positive pressure, and high-quality copper-based Al2O3 in-situ composite powder with less final impurity oxygen can be prepared with high safety on a large scale at low cost with the aluminum element in copper powder fully converted while Cu2O powder is not additionally needed as an oxygen source and hydrogen is not additionally needed. The obtained copper-based Al2O3 composite powder contains 0.189wt% to 1.701wt% of Al2O3, 0.05wt% or less of total impurities and the balance of copper.
Description
Technical field
The present invention relates to metal material field, be specifically related to a kind of use active carbon and carry out original position internal oxidation manufactured copper base Al
2o
3the process of composite powder and the copper base Al preparing
2o
3composite powder.
Background technology
Dispersion strengthening copper alloy (Dispersion Strengthened Copper, be called for short DSC) be the copper-based material with good comprehensive physical mechanical property, there is higher specific strength, specific modulus, good thermal conductivity, electric conductivity, wearability, high-temperature behavior, lower thermal coefficient of expansion, the higher combination properties such as dimensional stability.Yield strength and the tensile strength of dispersion-strengthened Cu are high, even after annealing, still possess most of yield strength, annealing can improve the ductility of copper alloy, but because the yield strength retention of dispersion-strengthened Cu is high, therefore in high conductance copper alloy, the dispersion-strengthened Cu yield strength of work hardening is the highest.The intensity of dispersion-strengthened Cu can compare favourably with multiple steel, and conductibility is similar to copper.The physical property of alumina dispersion-strenghtened copper material and fine copper closely similar, not only intensity is high for it, and electrical conductivity and thermal conductivity are also high; Even if be exposed to for a long time under the temperature (800 ~ 900 ℃) that approaches copper matrix fusing point, still can keep good intensity and conductive performance, so serviceability temperature scope is very large, use field is more extensive.Alumina dispersion-strenghtened copper can be applicable to the industrial circles such as electric power, electronics, machinery, can be used as electrical engineering switch and touches bridge, conticaster crystallizer liner, circuit lead frame, power asynchronous traction motor of high rotor, electric railway contact wire (contact line), thermonuclear reactor experiment (ITER) divertor vertical target fin, high impulse magnetic field conductors material etc.; And in these fields, there is the irreplaceable advantage of other material, especially as the progressively high-speed electric railway contact wire (contact line) of speed-raising now, than chromium zirconium copper product, having more outstanding high-strength highly-conductive engineering and apply durable stability, is important novel candidate materials.
Abroad, the research of internal oxidation production disperse copper enters the practical stage, and the SCM Corporation in Ohio, USA continent has formed monthly output 18 tons, the four kinds trades mark (C15710, C15720, C15735, C15760) Cu-Al
2o
3production scale.Germany, Russia, Japanese dispersion strengthening copper alloy are also produced at present, and this product processes is still in maintaining secrecy.
At home, Luoyang Copper Processing Group Co Ltd and Central South University early having carried out internal oxidation prepares Al
2o
3the research of/Cu dispersion strengthening copper alloy; application number is that 200410029836.0 Chinese invention patent " dispersion strengthening copper alloy and process of preparing thereof " discloses its preparation method; the technique of disposable interior oxidation and sintering is carried out in employing to static pressure ingots such as disperse copper; production efficiency increases; but because the stability aspect of properties of product all exists many problems, therefore could not scale put on market.
In recent years, successively there are relevant scientific research institutions and the companies such as the coloured research institute in Beijing, Kunming and Hebei in the unit that dispersion-strengthened Cu is studied, tests and attempt to produce, as: the Chinese invention patent that application number is 200510032208.2 " Zero-sintering and hydrogen-expansion nano-diffusion reinforced Cu-Al
2o
3alloy And Preparation Method "; Application number is 200610048645.8 Chinese invention patent " aluminium oxide growth in situ industrial production technology in dispersion-strengtherning copper product "; Application number is 200910303699.8 Chinese invention patent " a kind of preparation technology of aluminum oxide dispersion strengthened copper with high strength and high conductivity "; Application number is the Chinese invention patent " a kind ofization aluminium dispersion-strengthened Cu blaster fuse frame material and preparation method " of 200310119001.X; Application number is 200710195524.0 Chinese invention patent " extra-high tension copper cash and preparation method thereof ".Wherein the coloured graduate disperse copper product in Beijing is mainly low, medium aluminium content (mass ratio of Al is 0.1 ~ 0.3% left and right), performance with have larger gap abroad; Other Research Center, company, owing to there being the problems such as batch production properties of product are unstable, abandon this project in succession.
Current domestic dispersion-strengtherning copper bar material is dependence on import still in fact, at military high-end electrovacuum with without cooling supramaximal current coil, conductor (as magnetic artillery element) field, is subject to import restriction abroad.
The method that above-mentioned domestic constituent parts is prepared dispersion-strengthened Cu is similar, generally include and produce copper-Al alloy powder, oxygen source making, batch mixing, isostatic cool pressing and make that short and thick ingot, Thermal Synthetic are processed, ingot is heated to the steps such as high temperature, hot extrusion, cold working, Performance Detection, these methods have following common outstanding shortcoming in commercially producing:
(1) impurity oxygen (O) affects performance
In product dispersion-strengtherning copper bar material, impurity oxygen content is difficult to control, and average impurity oxygen content > 150ppm, can not meet the ingredient requirement of making electrovacuum components and parts.In dispersion-strengtherning copper rod chemical analysis, except chemical combination state is present in Al
2o
3outside the oxygen element of phase, remaining oxygen is impurity oxygen, and impurity oxygen affects conductance, elevated temperature strength, during particularly as the materials'use of electrovacuum element, there will be Hydrogen Brittleness Phenomena, occurs crackle.
Usual method is as the oxygen source reason that mix with the copper powder that contains aluminium (Al) element (general 1:10 left and right) by a certain percentage, to be in order to reduce with hydrogen (H using cuprous oxide
2) reduction excess of oxygen manufacturing cost, for prevent exploding, with the reduction furnace of hydrogen reducing excess of oxygen, must under semi-open condition of normal pressure, carry out, not only the outside hydrogen gas consumption passing into is large, more important question is that under normal pressure, hydrogen is slow to copper powder diffusion inside speed, often can not be in the time range that manufacturing cost allows the abundant oxygen element of copper reduction inside, cause impurity oxygen residual, this is the high or unsettled one of the main reasons of impurity oxygen content while producing in batches according to usual method.
(2) residual pure aluminum (Al) element causes conductance unstable
The copper powder that contains aluminium element, when carrying out interior oxidation processes, if oxygen source is insufficient or diffusion difficulty, has part aluminium element and does not finally form Al
2o
3and still with aluminium element, be retained in the body of copper, residual aluminium element can reduce the conductance of copper (referring to < < copper alloy and processing handbook > > P127 thereof, publishing house of Central South University, 2002.5 ISN978-7-81061-465-8), work as aluminium element and form Al
2o
3after, the alloy state of aluminium element copper Al intermetallic in copper from solid solution is converted into disperse phase separated and copper matrix, copper matrix purifying, and conductance improves.As containing aluminium 0.2%(wt) the relative conductance of albronze annealed state (IACS, %) be 87, equally containing aluminium 0.2%(wt) dispersion-strengthened Cu (aluminium is with Al
2o
3the existence of disperse phase form) the relative conductance of annealed state (IACS, %) is 94.
Usual method be using cuprous oxide as oxygen source by a certain percentage (general about 1:10) mix with the copper powder that contains aluminium element, in airtight body of heater, heat, the oxygen of cuprous oxide is passed through to Surface Contact the solid phases both in the situation that, oxygen is to the copper powder interior shifting that contains aluminium element, such effect due to oxygen demand at solid phase particles across interfacial diffusion, efficiency is low, causes the simple substance state of ubiquity whole alumiunum amount 5 ~ 15% in actual production residual, causes conductance unstable.
(3) cracking defect
Usual method contains Al at handle
2o
3when disperse phase copper powder carries out following process (as hot extrusion bar), can there is minute stratiform, flakey, annular space shape cracking in various degree, this be due to the hot extrusion ingot blank of the isostatic compaction of copper powder when recipient extruding is flowed between copper powder caking property not enough, between copper powder, the main cause of caking property deficiency is to work as Al
2o
3disperse phase has reduced Copper Powder Surface energy when Copper Powder Surface, shows as caking property deficiency and is difficult to press knot.
Summary of the invention
In view of this, one of object of the present invention is to provide a kind of use active carbon to carry out original position internal oxidation manufactured copper base Al
2o
3the process of composite powder, the dispersion-strengthened Cu impurity oxygen too high levels of preparing to overcome process of the prior art, residual pure aluminum element causes conductance unstable, and caking property deficiency is difficult to press knot and causes deficiency and the defects such as cracking.
For achieving the above object, the invention provides following technical scheme:
In active carbon original position of the present invention, copper base Al is prepared in oxidation
2o
3the method of composite powder, comprises the steps:
A, oxidation: take the copper powder that contains aluminium (Al) element and pack in reaction tray, put into resistance furnace heating and thermal insulation, in air ambient, generate the cupric oxide (CuO) of black;
In technique scheme, described copper powder contains the aluminium element of 0.1 ~ 0.9wt%.
Preferably, by described copper powder in resistance furnace 350 ℃ insulation more than 6 hours.
B, further aluminium element in described copper powder is oozed to oxygen and to cupric oxide deoxidation: the product of step a is placed in vacuum annealing furnace, after vacuumizing, is filled with nitrogen (N
2), heating and thermal insulation, cooling with stove after, bolarious cuprous oxide (Cu comes out of the stove to obtain
2o);
Preferably, be filled with nitrogen to half atmospheric pressure (0.5 * 10 after being evacuated to vacuum 0.1MPa
5pa), with 730 ± 10 ℃ of insulations 2 ~ 3 hours.
By above-mentioned steps a, b, now completed the aluminium element that contains in each trickle copper powder to Al
2o
3converted in-situ, owing to not being oxygen matchmaker (cuprous oxide powder) solid phase contact diffusion oxygen supply by conventional method, but autologous oxygen supply, so aluminium element oxidation is fully, pure aluminum state residue detection does not go out; But also have unnecessary oxygen element to exist and need further to remove with cuprous oxide form.
C, remove unnecessary oxygen element: the product of step b is placed in vacuum annealing furnace, put into the open-top receptacle that charcoal is housed simultaneously, described charcoal weight>=with 2% of the static pressure billet weights such as stove copper powder, be evacuated to vacuum 40 ~ 50KPa, to retain micro-air, for the startup of chain type redox reaction provides free gaseous oxygen (O
2), being warming up to 800 ~ 850 ℃, insulation is until vacuum pressure no longer continues rising;
If vacuum continue to reduce (pressure rise), showing that cuprous oxide reduction becomes contains Al
2o
3elemental copper process is carried out, concrete: excessive charcoal at high temperature be take remnant oxygen as starting medium generation carbon monoxide (C O) gas, and the unnecessary oxygen of CO gas and copper powder forms reduction reaction, generates carbon dioxide (C O
2), the oxide of copper is reduced into copper simultaneously, wherein carbon dioxide continues at high temperature to generate CO gas with excessive charcoal, CO gas continues and the oxygen at high temperature diffusing out due to concentration gradient reason from copper powder inside secondary response again, and the cuprous oxide of copper powder inside is reduced gradually.
Atmospheric CO in confined space, carbon dioxide be because the oxygen element of cuprous oxide shifts and causes dividing potential drop to continue to improve under the excessive prerequisite of active carbon, keeps sealing until be raised to malleation (1.1 atmospheric pressure, 1.2 * 10
5pa), by regulation safety valve pressurize.When pressure keeps stablizing, newly-generated without carbon monoxide, carbon dioxide, show at 800～850 ℃, 1.2 * 10
5above-mentioned reaction terminating under the reaction condition of Pa and excessively carbon content active, what when this reaction reaches poised state, in copper powder, impurity oxygen concentration of element can be stable is controlled at below 5ppm (wt).
And because aluminium element is lower than the standard generation free enthalpy △ Go of copper, Al under the partial pressure value condition of above-mentioned temperature and various gases
2o
3stable, so Al
2o
3by carbon monoxide, do not reduced, only have copper to be reduced.Originally the copper particulate that contained thus aluminium element changes into and contains Al
2o
3copper particulate, completed oxidizing process in aluminium element original position.
D, Copper Powder Surface activating pretreatment: the product of step c, with the cooling rear taking-up of stove, is placed in to borax (Na
2b
4o
7.10H
2o) in the aqueous solution, soak, dewater, dry.
In technique scheme, described borax solution concentration is 0.5 ~ 1wt%.
Preferably, the product of step c is placed in to above-mentioned borax solution and soaks at least 10 minutes, dehydration, not higher than 90 ℃ of oven dry.
So just complete the preparation of alumina dispersion-strenghtened copper powder, this method adopts inexpensive active carbon (charcoal) by dielectric gas, to reduce excess of oxygen under high temperature and certain pressure, by chain reaction, the amount of the reducibility gas carbon monoxide generating depends on remaining oxygen, so safe, cost is low, charcoal consumption is few, remaining recycling, so there is no the restriction of manufacturing cost, can to excess of oxygen, reduce fully, impurity oxygen can be stable be controlled at below 5ppm, conscientiously impurity oxygen content is controlled at conductance, elevated temperature strength, during particularly as the materials'use of electrovacuum element, there will be below the dysgenic lower limit content of Hydrogen Brittleness Phenomena.
Method of the present invention is with sufficient gaseous oxygen by the fully inner and diffusion fast to self of copper powder self surface, and fully, conductance is high in aluminium element oxidation, and index is stable.
The present invention in copper powder completes original position, be oxidized and reduce cooling with stove after, Copper Powder Surface is carried out to activating pretreatment: will be oxidized Solder for Al-Cu Joint Welding mixed powder and in borax solution, soak, dry; After pretreatment, can significantly improve the surface conjunction power of copper powder when sintering, be equivalent to scaling powder effect, improve the follow-up sintered density that is used in the powder pressure knot blank of manufacturing dispersion-strengtherning copper rod spool Strip, can significantly reduce and avoid the cracking defect of hot extrusion, improve lumber recovery, end product quality is stable.
The copper base Al that provides a kind of process of using active carbon to carry out being oxidized in original position to manufacture is provided two of object of the present invention
2o
3composite powder.
Preferably, described copper base Al
2o
3composite powder composition is: Al
2o
3be 0.189 ~ 1.701wt%, impurity summation≤0.05wt%, surplus is copper.
Therefore, the relatively existing method of method of the present invention has the 5ppm(wt that is controlled at that flow process is short, impurity oxygen concentration of element can be stable) in following, aluminium oxidation be almost all converted into Al
2o
3, pure aluminum state residue detection does not go out, thereby has guaranteed that goods conductance is high, stable high-temperature strength, by surface active, significantly improves subsequent thermal processing lumber recovery, the copper base Al preparing by the method
2o
3composite powder becomes the real quality raw materials that are applicable to manufacturing in batches alumina dispersion-strenghtened copper material.
The specific embodiment
Below the technical scheme in the embodiment of the present invention is described in detail, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Experiment material used in following embodiment, if no special instructions, all can be bought and be obtained by routine biochemistry reagent shop.
Embodiment 1
C19120 trade mark alumina dispersion-strenghtened copper material for the manufacture of U.S. ASTM standard (domestic this product GB, the rower not yet issued is described) is used: use active carbon to carry out original position internal oxidation manufactured copper base containing 0.189%(mass percent) Al
2o
3composite powder.
Take containing 0.105%(mass percent) the copper powder 200Kg of aluminium (Al) element carry out following original position compound working procedure process form containing 0.189%(mass percent) aluminium oxide (Al
2o
3) copper powder:
(1) oxidation: copper powder packs in stainless steel disc, then puts into 350 ℃ of insulations of 60KW chamber type electric resistance furnace 6 hours, generates cupric oxide (CuO) powder and become black in air ambient, and now copper powder is because oxidation knot tying becomes block.
(2) further aluminium element in copper powder (Al) is oozed oxygen and cupric oxide (CuO) is given to deoxidation: above-mentioned copper powder is placed in vacuum annealing furnace, is filled with nitrogen (N after being evacuated to vacuum 0.1MPa
2) to half atmospheric pressure 0.5 * 10
5pa, with 730 ℃ ± 10 ℃ insulations 2 hours ~ 3 hours, after coming out of the stove after cooling with stove, copper powder became bolarious cuprous oxide (Cu
2o).Form becomes bulk automatically to change into loose cuprous oxide (Cu by cupric oxide recited above (CuO) black knot tying
2o) Powdered.
(3) reduction: above-mentioned copper powder is placed in vacuum annealing furnace, puts into be equipped with simultaneously and be equivalent to copper powder weight 2%, count the uncovered metal bucket of the charcoal of 4 kilograms, be evacuated to half atmospheric pressure of vacuum 0.5 * 10
5pa, is warming up to 830 ℃, if vacuum is continuing to reduce (pressure rise), now shows cuprous oxide (Cu
2o) reduction becomes and contains Al
2o
3elemental copper process is carried out, and keeps sealing until be raised to malleation (1.1 atmospheric pressure, 1.2 * 10
5pa), by regulation safety valve pressurize, when pressure keeps stablizing, without carbon monoxide (CO), carbon dioxide (CO
2) newly-generated, show at 830 ℃, 1.2 * 10
5above-mentioned reaction terminating under the reaction condition of Pa and excessively carbon content active (charcoal).
(4) Copper Powder Surface activating pretreatment: with the cooling rear taking-up copper powder of stove, by above-mentioned copper base Al
2o
3composite powder is placed in borax (Na
2b
4o
7.10H
2o) in the aqueous solution (borate concentration 0.5wt%), soak 10 minutes, borax solution temperature normal temperature, centrifuge dewaters to copper powder, 90 ℃ of oven dry in baking oven.
So far, complete for the manufacture of U.S. ASTM standard C19120 trade mark alumina dispersion-strenghtened copper material and contain 0.189%(mass percent with copper base) Al
2o
3the manufacture of original position composite powder.
After (3) reduction step completes, sampling entrusts Shanghai Inst. of Materials to pure aluminum (Al), Al wherein
2o
3two kinds of compositions detect; After (4) Copper Powder Surface activating pretreatment step completes, as raw material, by our company, be processed into voluntarily the C19120 trade mark alumina dispersion-strenghtened copper wire rod of diameter, by inspection center of our company, its conductance, hot mastication point (maximum temperature that keeps 80% above room temperature tensile strength), hydrogen embrittlement test (checked for impurities oxygen content) detected.
Result is as following table 1:
Embodiment 2
C19160 trade mark alumina dispersion-strenghtened copper material for the manufacture of U.S. ASTM standard is used: use active carbon to carry out original position internal oxidation manufactured copper base containing 0.6%(mass percent) Al
2o
3composite powder.
Take actual in 0.33%(mass percent) the copper powder 255Kg of aluminium (Al) element carry out following original position compound working procedure process form containing theoretical value 0.624%(mass percent) aluminium oxide (Al
2o
3) copper powder:
(1) oxidation: copper powder packs in stainless steel disc, then puts into 355 ℃ of insulations of 60KW chamber type electric resistance furnace 6 hours, generates cupric oxide (CuO) and become black in air ambient, and now copper powder is because oxidation knot tying becomes block.
(2) further aluminium element in copper powder (Al) is oozed oxygen and cupric oxide (CuO) is given to deoxidation: above-mentioned copper powder is placed in vacuum annealing furnace, is filled with nitrogen (N after being evacuated to vacuum 0.1MPa
2) to half atmospheric pressure 0.5 * 10
5pa, with 730 ℃ of insulations 3 hours, after coming out of the stove after cooling with stove, copper powder became brick-red loose cuprous oxide (Cu
2o) Powdered.
(3) reduction: above-mentioned copper powder is placed in vacuum annealing furnace, puts into be equipped with simultaneously and be equivalent to copper powder weight 3%, count the uncovered metal bucket of the charcoal of 7.6 kilograms, be evacuated to half atmospheric pressure of vacuum 0.5 * 10
5pa, is warming up to 835 ℃, and vacuum, continuing to reduce (pressure rise), now shows cuprous oxide (Cu
2o) reduction becomes and contains Al
2o
3elemental copper process is carried out, and keeps sealing until be raised to malleation (1.1 atmospheric pressure, 1.2 * 10
5pa), after pressure keeps stablizing, without carbon monoxide (CO), carbon dioxide (CO
2) newly-generated, show at 830 ℃, 1.2 * 10
5above-mentioned reaction terminating under the reaction condition of Pa and excessively carbon content active (charcoal).
(4) Copper Powder Surface activating pretreatment: with the cooling rear taking-up copper powder of stove, by above-mentioned copper base Al
2o
3composite powder is placed in borax (Na
2b
4o
7.10H
2o) in the aqueous solution (borate concentration 0.7wt%), soak 10 minutes, borax solution temperature normal temperature, centrifuge dewaters to copper powder, sets 90 ℃ of oven dry in baking oven.
So far, complete for the manufacture of U.S. ASTM standard C19120 trade mark alumina dispersion-strenghtened copper material and contain 0.189%(mass percent with copper base) Al
2o
3the manufacture of original position composite powder.
After (3) reduction step completes, sampling entrusts Shanghai Inst. of Materials to pure aluminum (Al), Al wherein
2o
3two kinds of compositions detect; After (4) Copper Powder Surface activating pretreatment step completes, as raw material, by our company, be processed into voluntarily the C19160 trade mark alumina dispersion-strenghtened copper wire rod of diameter, by inspection center of our company, its conductance, hot mastication point (maximum temperature that keeps 80% above room temperature tensile strength), hydrogen embrittlement test (checked for impurities oxygen content) detected.
Result is as following table 2:
In those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (8)
1. in an active carbon original position, copper base Al is prepared in oxidation
2o
3the method of composite powder, is characterized in that, comprises the steps:
A, take the copper powder that contains aluminium element and pack in reaction tray, put into resistance furnace heating and thermal insulation, in air ambient, generate cupric oxide;
B, the product of step a is placed in vacuum annealing furnace, after vacuumizing, is filled with nitrogen, heating and thermal insulation, cooling with stove after, the cuprous oxide of coming out of the stove to obtain;
C, the product of step b is placed in vacuum annealing furnace, put into the open-top receptacle that charcoal is housed, described charcoal weight >=with 2% of the static pressure billet weights such as stove copper powder, be evacuated to vacuum 40 ~ 50KPa simultaneously, be warming up to 800 ~ 850 ℃, insulation is until vacuum pressure no longer continues rising;
D, by the product of step c with the cooling rear taking-up of stove, be placed in that borax solution soaks, dehydration, dry, obtain target product.
2. method according to claim 1, is characterized in that: in step a, described copper powder contains the aluminium element of 0.1 ~ 0.9wt%.
3. method according to claim 2, is characterized in that: in step a, by the 350 ℃ of insulations more than 6 hours in resistance furnace of described copper powder.
4. method according to claim 1, is characterized in that: in step b, be filled with nitrogen to half atmospheric pressure after being evacuated to vacuum 0.1MPa, with 730 ± 10 ℃ of insulations 2 ~ 3 hours.
5. method according to claim 1, is characterized in that: in steps d, described borax solution concentration is 0.5 ~ 1wt%.
6. method according to claim 5, is characterized in that: in steps d, the product of step c is placed in to above-mentioned borax solution and soaks at least 10 minutes, dehydration, not higher than 90 ℃ of oven dry.
7. a copper base Al who prepares according to the method described in claim 1 ~ 6 any one
2o
3composite powder.
8. copper base Al according to claim 7
2o
3composite powder, is characterized in that: described copper base Al
2o
3composite powder composition is: Al
2o
3be 0.189 ~ 1.701wt%, impurity summation≤0.05wt%, surplus is copper.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772737A (en) * | 2016-04-23 | 2016-07-20 | 东莞市精研粉体科技有限公司 | Method for preparing dispersion-strengthening copper powder through in-situ oxidation-reduction method |
| CN111974392A (en) * | 2020-09-10 | 2020-11-24 | 安徽德诠新材料科技有限公司 | Preparation method of ternary copper catalyst |
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| CN1563447A (en) * | 2004-03-30 | 2005-01-12 | 洛阳铜加工集团有限责任公司 | Dispersion strengthened copper alloy, and preparing technical method |
| CN101178957A (en) * | 2007-12-04 | 2008-05-14 | 河南科技大学 | Copper alloy contact wire and method of producing the same |
| CN101338389A (en) * | 2008-06-19 | 2009-01-07 | 河南科技大学 | Preparation process of rare-earth copper alloy material for preparing integral dispersion copper |
| CN103276230A (en) * | 2013-04-27 | 2013-09-04 | 苏州金江铜业有限公司 | Preparation method of Al2O3 dispersion strengthened copper |
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2014
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|---|---|---|---|---|
| GB1158872A (en) * | 1966-03-07 | 1969-07-23 | Ass Elect Ind | Improvements relating to Metal Parts Production from Metal Powder |
| CN1563447A (en) * | 2004-03-30 | 2005-01-12 | 洛阳铜加工集团有限责任公司 | Dispersion strengthened copper alloy, and preparing technical method |
| CN101178957A (en) * | 2007-12-04 | 2008-05-14 | 河南科技大学 | Copper alloy contact wire and method of producing the same |
| CN101338389A (en) * | 2008-06-19 | 2009-01-07 | 河南科技大学 | Preparation process of rare-earth copper alloy material for preparing integral dispersion copper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772737A (en) * | 2016-04-23 | 2016-07-20 | 东莞市精研粉体科技有限公司 | Method for preparing dispersion-strengthening copper powder through in-situ oxidation-reduction method |
| CN111974392A (en) * | 2020-09-10 | 2020-11-24 | 安徽德诠新材料科技有限公司 | Preparation method of ternary copper catalyst |
| CN111974392B (en) * | 2020-09-10 | 2023-05-12 | 安徽德诠新材料科技有限公司 | Preparation method of ternary copper catalyst |
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Application publication date: 20141126 |