CN108441671A - Five yuan of Cu-base composites of one kind and preparation process - Google Patents
Five yuan of Cu-base composites of one kind and preparation process Download PDFInfo
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- CN108441671A CN108441671A CN201810252387.8A CN201810252387A CN108441671A CN 108441671 A CN108441671 A CN 108441671A CN 201810252387 A CN201810252387 A CN 201810252387A CN 108441671 A CN108441671 A CN 108441671A
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- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000000498 ball milling Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 4
- 150000002885 octadecanoids Chemical class 0.000 claims description 4
- 238000004886 process control Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052593 corundum Inorganic materials 0.000 abstract description 22
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 22
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 239000010949 copper Substances 0.000 description 30
- 239000002245 particle Substances 0.000 description 20
- 229910052802 copper Inorganic materials 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 238000002490 spark plasma sintering Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000005551 mechanical alloying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000713 high-energy ball milling Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910017767 Cu—Al Inorganic materials 0.000 description 1
- 229910000858 La alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000009768 microwave sintering Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
Abstract
The present invention relates to a kind of five yuan of Cu-base composites and preparation processes.Cu‑Al2O3The key point of Cr Gr five yuan of Cu-base composites of La is the composition design and technique realization method of multi-element composite material, emphasis is the proportioning of the various powder such as Cu powder, Al powder, CuO powder, graphite powder (Gr), Cr powder, La powder, the especially parameter size of ball-milling technology and sintering process determines the comprehensive performance of material after sintering.Its rare earth elements Cr powder and La powder can play the role of purification crystal boundary, improve electric conductivity.Graphite powder plays the role of reduction friction coefficient, improves electric conductivity.
Description
Technical field
The invention belongs to field of compound material.
Background technology
Copper is due to many excellent performances, especially having excellent electric conductivity, thermal conductivity, corrosion resistance and easy processing
Formability makes one of most popular metal material other than steel and aluminium.But since pure Cu cannot be satisfied transmitting
Complicated machineries and the chemical action environment such as process high temperature, top load and high-speed friction abrasion, so mostly using copper conjunction at present
Gold and Cu-base composites.
Currently, Cu-Al2O3Composite material and Cu- graphite (Gr) composite material are research relative maturities, using than wide
Two class Cu-base composites.Cu-Al2O3Composite material is hard by adding the high-melting-point of nanoscale, height in Copper substrate
Degree, and the Al with high-temperature stability2O3Ceramic particle, to significantly improve the room temperature and mechanical behavior under high temperature of matrix.Therefore,
It is had a wide range of applications in fields such as railway locomotive conducting wire, lead frame copper strip, spot-wedling electrode, electrical contacts.Cu-Gr composite materials
It is graphite particle of the addition with self lubricity, high-melting-point, resistance fusion welding energy and resistance to arc erosion energy in Copper substrate, is allowed to
Also have while keeping Copper substrate good conductive energy it is excellent lubricate, anti-melting welding and resistance to arc erosion ability.Therefore, exist
The fields such as friction material, contact material, conductive material are with a wide range of applications.
But due to the limitation of particle phase behaviour, material some aspects are being improved by particle strengthening Cu-base composites
While performance, electric conductivity reduction frequently can lead to.The tissue of composite material can be purified by adding rare earth element, and
And the impurity in tissue is reduced, improve the electric conductivity of Cu-base composites.
Therefore, in order to give full play to the synergistic effect of different constituent elements, comprehensive performance more preferably new material is obtained, is needed pair
Multiphase constituent element mixes Cu-base composites expansion research.
Since addition mutually has different physics and chemical property from Copper substrate, very by traditional casting technology
Hardly possible realize addition mutually Dispersed precipitate in the base and with the good interface cohesion of matrix.Mechanical alloying passes through prolonged
High-energy ball milling can be such that each alternate atom level that reaches combines, it is considered to be a kind of practicable particle strengthening Cu-base composites
Preparation process.
But it prepares multiphase constituent element to mix Cu-base composites to face the reunion of particle phase, particle phase and matrix phase wetability poor
Technical barrier.The preparation means of current this kind of material mainly or using prior powder metallurgy technique, mutually reunite and compare by particle
Seriously, particle size is larger, directly affects the understanding of people's synergistic mechanism between multicomponent, constrains Cu-base composites and exists
Application in engineering.
Therefore, the sintering forming process that mechanical alloying prepares composite material is also the hot spot studied at present.It is common to burn
Knot technique mainly has cold-rolled sintered, hot pressed sintering, isostatic sintering, microwave sintering and discharge plasma sintering.Wherein, electric discharge etc.
Ion is sintered as a kind of new sintering technology, is had the characteristics that low temperature, Fast Sintering, is to prepare novel metal based composites
Effective means.Some the study found that discharge plasma sintering than Cu-base composites prepared by cold-rolled sintered and hot pressed sintering
With higher density, hardness, conductivity, intensity and properties of antifriction and wear resistance.
Invention content
The technical problems to be solved by the invention：Applying charge plasma sintering process prepares Cu-Al2O3- Cr-Gr-La five
First Cu-base composites effectively promote electric conductivity, are provided simultaneously with excellent anti-friction wear-resistant while improving the intensity of material
Energy.
Discharge plasma sintering principle and Cu-Al2O3Five yuan of Fabrication Technology for Copper Matrix Composites of-Cr-Gr-La.
1, discharge plasma sintering principle
Discharge plasma sintering (Spark Plasma Sintering, SPS) is that one kind developed in recent years is novel
Fast Sintering technology.The technology be passed directly between powder particle pulse current carry out heat-agglomerating, therefore sometimes also by
Referred to as plasma activated sintering (Plasma Activated Sinteriny, PAS) or plasma-assisted sintering (Plasma
Assister Sinteriny, PAS).
The key of SPS technologies is to utilize micro discharge phenomenon caused by powder particle gap.First, sintering early period due to
There are more gaps between powder particle, by pulsing electric discharge phenomena between adjacent particle, since pulsed discharge generates
Discharge impact wave and electronics, ion negative direction in the electric field flow at high speed, the gas escape of powder adsorption, powder can be made
The oxidation film on surface is breakdown to a certain extent, and powder is made to be purified, activate；Second, due to pulse be moment, discontinuously,
High-frequency occurs, and is produced not in contact with heat discharge caused by the arc discharge of position and powder particle contact site in powder particle
The diffusion of powder particle atom is all greatly facilitated in raw Joule heat, and diffusion coefficient is more much greater than under usual hot pressing condition,
It is powder sintered rapid to reach；Third, the addition of on-off fast-pulse make the electric discharge position in powder and joule hair
Thermal part can all fast move, and the sintering of powder is enable to homogenize.Therefore, SPS processes can be regarded as particle electric discharge, conduction
It is heated and pressurizeed the result of comprehensive function.
Compared with conventional sintering, SPS prepares Cu-base composites and has the following advantages：
(1) sintering temperature is low, and compared with cold-rolled sintered and hot pressed sintering, sintering temperature can reduce by 50 DEG C or more, or even have
Document report can make sintering temperature reduce 200-300 DEG C；
(2) preforming to powder progress it need not can be sintered directly into dense body, and sintering pressure ordinary circumstance is small
In 100MPa；
(3) sintering process is rapid, and sintering is efficient, this is mainly reflected in two aspects, and one is the fast (80-100 of heating rate
DEG C/min), two is short (2-10min) for soaking time, and cold-rolled sintered and hot pressed sintering heating rate be generally 5-20 DEG C/
Min, soaking time need 30-120min or even longer.
2, a kind of preparation process of five yuan of Cu-base composites, it is characterised in that：
Raw material powder ingredient and mass percent are as follows：
Mixed powder is made by the above mass percent, adition process controlling agent carries out ball milling, process control agent octadecanoid acid
Content is powder quality 1%,
Discharge plasma sintering process is：
Sintering mold material is graphite, is sintered initial pressure 5MPa, and sintering dwell pressure is 40MPa, and vacuum degree is less than
10Pa, 100 DEG C/min of heating rate, sintering 6min is prepared into composite material, furnace cooling after the completion of sintering at 800 DEG C.
Further, ball material mass ratio 20:1, rotational speed of ball-mill 500r/min, Ball-milling Time 10h.
The Cu-Al prepared by discharge plasma sintering2O3Five yuan of Cu-base composites of-Cr-Gr-La have good lead
Electrically and mechanical property, pure copper material intensity difference and the low disadvantage of common Cu-base composites electric conductivity can be overcome.
Description of the drawings
Fig. 1 discharge plasma sintering system construction drawings
Fig. 2 agglomerated material SEM microscopic appearances
(a)Al2O3/Cu；(b)Cu-Al2O3Five yuan of Cu-base composites of-Cr-Gr-La
Pure Cu (b) 1wt%Al of each fracture surface of sample patterns (a) of Fig. 32O3/Cu(c)Cu-Al2O3Five yuan of-Cr-Gr-La is copper-based multiple
Condensation material
Specific implementation mode
Cu-Al2O3The basic component of five yuan of Cu-base composites of-Cr-Gr-La mainly has：
(1) Cu powder, 15-25 μm of range grain size
(2) Al powder, about 15-25 μm of range grain size
(3) CuO powder, grain size are less than 1 μm
(4) natural flaky graphite powder (Gr), 10-20 μm of range grain size
(5) Cr powder, 8-12 μm of range grain size
(6) La powder, 3-7 μm of range grain size
The quality proportioning of each powder is as shown in table 1.
1 powder main component of table and mass percent
Since, since local temperature is excessively high, ball-milled powder is easy and abrading-ball, tank skin soldering in Process During High Energy Ball Milling, to
The reuse for influencing abrading-ball and ball grinder, so the adition process controlling agent in metal mixed powder.Process control agent is：
Octadecanoid acid, skeleton symbol are：CH3(CH2)16COOH。
Mixed powder is made by the above mass percent, adition process controlling agent carries out ball milling using planetary ball mill.Ball milling
Technique is：Planetary ball mill, process control agent octadecanoid acid content are powder quality 1%, ratio of grinding media to material (mass ratio) 20:1, ball
Grind rotating speed 500r/min, Ball-milling Time 10h.
Discharge plasma sintering process is：
Sintering mold material is graphite, is sintered initial pressure 5MPa, and sintering dwell pressure is 40MPa, and vacuum degree is less than
10Pa, 100 DEG C/min of heating rate, sintering 6min is prepared into composite material at 800 DEG C, with stove cycle water cooling after the completion of sintering
But, many experiments find that the material comprehensive performance prepared by this parameter is best.
1、Cu-Al2O3The microscopic structure of five yuan of Cu-base composites of-Cr-Gr-La
Fig. 2 is the SEM microscopic appearances of agglomerated material, wherein white pointing object is nanometer Al2O3Particle, grey black are matrix
Cu or Cu-Cr-Gr-La alloys, aterrimus are hole.As seen from the figure, hole is all fewer in 2 kinds of materials, shows that SPS methods are to burn
Tie the effective means of mechanical alloying composite powder.Al2O3In/Cu composite materials, nanometer Al2O3Particle dispersion is relatively uniform, but
It is the presence of slight reunite；Cu-Al2O3Five yuan of Cu-base composites agglomerations of-Cr-Gr-La mitigate.It should be the result shows that addition be suitable
The rare earth La of amount and other alloying elements are conducive to avoid a nanometer Al2O3The generation of particle agglomeration, to promote nano particle disperse
The performance of invigoration effect.
2, the physical and mechanical properties of composite material
The physical and mechanical properties of composite material prepared by same process are shown in Table 2.There it can be seen that Al2O3Addition can
To greatly improve hardness, the tensile strength of pure Cu, but electric conductivity only has the 55.6% of pure Cu；And Cu-Al2O3Five yuan of-Cr-Gr-La
Cu-base composites improving hardness and on the basis of tensile strength, electric conductivity up to pure Cu 76.9%.
The physical and mechanical properties of 2 Cu-base composites of table
3, composite material stretching fracture morphology analysis
To pure Cu, Al2O3/ Cu and Cu-Al2O3The stretching fracture of five yuan of-Cr-Gr-La, three kinds of Cu-base composites materials is made
Comparative analysis.The SEM patterns of 3 kinds of stretching fractures are shown in Fig. 3.
Fig. 3 (a) is the stretching fracture SEM patterns of pure Cu samples, it is characterized in that typical isometric dimple, illustrates the crystalline substance of material
Grain is tiny, and dimple is cleaner, slightly the clast of Cu or is mingled with, and the surrounding of " nest " tearing rib is thinner, more, shows material
Plasticity is preferable.
Fig. 3 (b) is Al2O3The stretching fracture SEM patterns of/Cu composite materials, Fracture Characteristics are that based on isometric dimple and have
The inconsistent deformation opening dimple of a small amount of opening direction, this feature of fracture reflect sample in tension test, sample two
A collet to neutral not so good, cause in stretching except direct stress in addition to also distorting stress, but the tensile strength of the sample reaches
395MPa.Clast in the sample dimple is more compared with pure Cu fractures, and the purer Cu's of tearing deformation rib around dimple is thick less, shows
The plasticity ratio pure Cu of the material is low.
Fig. 3 (c) is Cu-Al2O3The stretching fracture SEM patterns of five yuan of Cu-base composites of-Cr-Gr-La, it is characterized in that waiting
Axis dimple and more and wide tearings deform rib.Compared with Fig. 3 (b), isometric dimple is smaller, and it is more, thinner to tear rib.This is special
Sign illustrates Cu-Al2O3The intensity index and Al of five yuan of Cu-base composites of-Cr-Gr-La2O3/ Cu composite materials are suitable, but toughness
The former is better than the latter.
Cu-Al2O3The key point of five yuan of Cu-base composites of-Cr-Gr-La is the composition design and work of multi-element composite material
Skill realization method, emphasis are the proportionings of the various powder such as Cu powder, Al powder, CuO powder, graphite powder (Gr), Cr powder, La powder, especially
The parameter size of ball-milling technology and sintering process determines the comprehensive performance of material after sintering.Its rare earth elements Cr powder and La
Powder can play the role of purification crystal boundary, improve electric conductivity.Graphite powder plays the role of reduction friction coefficient, improves electric conductivity.
Claims (2)
1. a kind of preparation process of five yuan of Cu-base composites, it is characterised in that：
Raw material powder ingredient and mass percent are as follows：
Mixed powder is made by the above mass percent, adition process controlling agent carries out ball milling, process control agent octadecanoid acid content
For powder quality 1%,
Discharge plasma sintering process is：
Sintering mold material is graphite, is sintered initial pressure 5MPa, and sintering dwell pressure is 40MPa, and vacuum degree is less than 10Pa, rises
100 DEG C/min of warm rate, sintering 6min is prepared into composite material, furnace cooling after the completion of sintering at 800 DEG C.
2. technique according to claim 1, feature exist：Ball-milling technology is：Ball material mass ratio 20:1, rotational speed of ball-mill
500r/min, Ball-milling Time 10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810252387.8A CN108441671A (en) | 2018-03-26 | 2018-03-26 | Five yuan of Cu-base composites of one kind and preparation process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810252387.8A CN108441671A (en) | 2018-03-26 | 2018-03-26 | Five yuan of Cu-base composites of one kind and preparation process |
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| CN108441671A true CN108441671A (en) | 2018-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109504872A (en) * | 2018-12-29 | 2019-03-22 | 山东阳谷电缆集团有限公司 | A kind of high-strength wearable copper alloy contact wire and its preparation process |
| WO2020064295A1 (en) * | 2018-09-26 | 2020-04-02 | Siemens Aktiengesellschaft | Powder mixture for producing an electrical contact material, method for producing the electrical contact material using the powder mixture, electrical contact material and use of the electrical contact material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020064295A1 (en) * | 2018-09-26 | 2020-04-02 | Siemens Aktiengesellschaft | Powder mixture for producing an electrical contact material, method for producing the electrical contact material using the powder mixture, electrical contact material and use of the electrical contact material |
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Application publication date: 20180824 |