CN107254598A - A kind of preparation method of silver-colored MAX phases sliding contact material - Google Patents
A kind of preparation method of silver-colored MAX phases sliding contact material Download PDFInfo
- Publication number
- CN107254598A CN107254598A CN201710325197.XA CN201710325197A CN107254598A CN 107254598 A CN107254598 A CN 107254598A CN 201710325197 A CN201710325197 A CN 201710325197A CN 107254598 A CN107254598 A CN 107254598A
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- Prior art keywords
- silver
- powder
- max phases
- sliding contact
- contact material
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- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1084—Alloys containing non-metals by mechanical alloying (blending, milling)
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of preparation method of silver-colored MAX phases sliding contact material.The characteristics of technology, is, with conventional Ti3AlC2Or Ti2Two kinds of MAX phases powder of SnC are raw material with silver powder, using mechanical alloying+semisolid liquid phase sintering technology, and obtain silver-based sliding contact material by moulding processing.The advantage of the technology is that, using existing equipment, small investment, production cost is low.The technology obtains product advantage and is that it is possible to give full play to the self-lubricating of MAX phases, high tenacity, the advantage of electrically conductive performance, obtains good, the highly conductive silver-based sliding contact material product of self lubricity.
Description
Technical field
The present invention relates to a kind of preparation method of silver-colored MAX phases sliding contact material, belong to sliding contact material technology
Field.
Background technology
MAX phases are a kind of new self-lubricating materials with satisfactory electrical conductivity, and M represents transition metal, A and represents master
Race's element, X represent carbon or nitrogen, and conventional MAX phases have Ti3SiC2、Ti3AlC2、Ti2AlC、Ti3SnC2、Ti2SnC etc..
Silver-based sliding contact material, mainly using silver as base, other self-lubricating materials (such as MoS2, graphite etc.) are addition
The composite of thing, just because of traditional silver-based sliding contact material (additive：MoS2, graphite etc.) there is ability to bear
By force, the advantages of stick-slip performance is good, conductance scope is wide and prevents pollution is prevented under low speed, extensively should so as to be widely used
For every field such as daily life, industrial production and military affairs (for example：Contact, artificial satellite solar energy sailboard in switch
Brush in drive mechanism, electric locomotive pantograph, electric motor etc.).Foreign countries are begun to silver-based early in six the seventies
Solid lubricant carries out numerous studies, and wherein Glenn Dorsey point out Ag-MoS2- C self-lubricating materials are actual in friction
Contact area produces tremendous influence, the smaller heat to brush of real contact area to electrical property, the friction and wear behavior of material
Temperature rise influence is smaller, when this outer bruss temperature is raised, will result directly in contact resistance and significantly raises.G.N.Braterskaya exists
Silver matrix brush is tested under "on" position, with the increase of load, the waste of contact surface also increases therewith, while connecing
Occurs tear phenomenon in contacting surface.It is every to be related to electrical and electronic technology, communication with the constantly development and progress of science and technology
Technology, automatic control technology, all will require more and more higher to the intelligent of electrical equipment, industrialized level, and electrical equipment original paper is continuous
Direction towards Large Copacity, miniaturization is developed, and this will be proposed to the electrical contact original paper performance as electrical equipment " heart " and application
Higher requirement.Therefore the present invention uses mechanical alloying+semisolid liquid phase sintering technology, with conventional Ti3AlC2Or Ti2SnC
Two kinds of MAX phases powder are raw material with silver powder, prepare a kind of silver-colored MAX phases sliding contact material, the silver-colored MAX phases that the technology is prepared
Sliding contact material, can give full play to the self-lubricating of MAX phases, high tenacity, the advantage of electrically conductive performance, obtain self lubricity good
Good, highly conductive silver-based sliding contact material.
The technology of preparing of conventional silver-based sliding contact material mainly uses PM technique, and its technique is will be certain
After the silver powder and self-lubricating material powder of granularity are sufficiently mixed, completed by several steps such as compacting, sintering, densifications.The work
The advantage of skill is silver-based sliding contact material that is simple to operate, can preparing different self-lubricating material contents according to actual needs；
Have the disadvantage skewness of the self-lubricating material in silver matrix, the interface of silver and self-lubricating material is easy to be dirty in preparation
Dye, interface cohesion are poor, cause the unstable of the contact material electric conductivity and wearability, have a strong impact on the stability of circuit system
With accuracy.
The deficiency that the present invention exists for silver-based sliding contact material known technology prepared by powder metallurgy, it is proposed that adopt
Silver-colored MAX phases sliding contact material product is prepared with mechanical alloying+semisolid liquid phase sintering technology.
The content of the invention
The present invention be with commercially available silver powder (0.5-5 μm, purity be 99.95%), MAX phases (Ti3AlC2Or Ti3SnC) powder
(200-800nm, 99.9%) it is raw material that purity is.Specifically preparation technology is：
(1) dispensing is carried out for the silver of 60% (percentage by weight) according to phase containing MAX, the material prepared is then put into agate pot
In, it is 1 according to ratio of grinding media to material:1、2:1 or 3:1 ratio is put into agate ball, and with 200-500 revs/min (r/min), keeps 5-
The condition of 20 hours carries out mechanical alloying processing, to obtain the powder that 0.1-10 μm of silver wraps up MAX phases.
(2) 0.5-5 μm of silver powder is added in the powder for being obtained (1) so that content of the MAX phases in silver is 3-20%
(percentage by weight), is then handled through overmulling powder so that silver parcel MAX phase powder is well mixed with silver powder.
(3) powder being well mixed in (2) is fitted into mould, be pressed under the conditions of pressing pressure is 300-600MPa
Base substrate.
(4) base substrate in (3) is fitted into high purity graphite mould, be then placed in vacuum sintering furnace, holding vacuum is
10-3Under the conditions of Pa, 940-960 DEG C is warming up to 10-20 DEG C/min heating rate, 10-50min, then furnace cooling is incubated
After take out ingot blank.
(5) round bar, oval rod or square pole are squeezed under the conditions of squeeze pressure 600-1200MPa to the ingot blank in (4)
Shape product.
Brief description of the drawings
Fig. 1 is present invention process flow chart, and Fig. 2 and Fig. 3 are silver MAX phase sliding contact material microscopic structures of the invention
Figure.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is further elaborated, but the protection content of the present invention is not limited to institute
State scope.
Embodiment 1：
Such as Fig. 1 technological process, specific implementation process is：According to containing 60%Ti3AlC2The alloy for dental amalgam of alloy phase, claims
It is the Ti that 500nm, purity are 99.9% to take 6g granularities3AlC2The Ag powder that alloyed powder and 4g granularities are 3 μm, purity is 99.95% is put
Enter in agate pot；Simultaneously according to ratio of grinding media to material 1:1 ratio adds agate ball into agate pot, in 500 revs/min of rotating speed, keeps
Mechanical alloying processing is carried out under conditions of 10 hours, 700nm or so silver parcel Ti is obtained3AlC2The powder of alloy phase；Then
The Ag powder that 190g granularities are 3 μm, purity is 99.95% is added into the alloy powder so that Ti3AlC2Alloy is in alloyed powder
In content be 3%.3%Ti will be contained3AlC2The alloy for dental amalgam of alloy phase ball milling under conditions of rotating speed is 100 rev/min
0.5h so that silver parcel Ti3AlC2Alloy phase powder is well mixed with silver powder.Well mixed 200gAg alloyed powders are loaded into mould
In, it is pressed into ingot blank under the conditions of pressing pressure is 500MPa.Ingot blank is put into high purity graphite mould, graphite jig is put into very
In empty sintering furnace, 5 × 10 are reached in vacuum-3During Pa, 940 DEG C are warming up to 20 DEG C/min heating rate, and be incubated 50min
Under conditions of carry out semisolid liquid-phase sintering, then take out ingot blank after furnace cooling.It is in squeeze pressure by ingot blank finally
Round bar, oval rod or square rod-shaped articles are squeezed under the conditions of 1000MPa.
Embodiment 2：
Such as Fig. 1 technological process, specific implementation process is：According to containing 60%Ti2The alloy for dental amalgam of SnC alloy phases, claims
It is the Ti that 200nm, purity are 99.9% to take 12g granularities2The Ag that SnC alloyed powders and 8g granularities are 0.5 μm, purity is 99.95%
Powder is put into agate pot；Simultaneously according to ratio of grinding media to material 2:1 ratio adds agate ball into agate pot, 400 revs/min of rotating speed,
Mechanical alloying processing is carried out under conditions of being kept for 5 hours, 300nm or so silver parcel Ti is obtained2The powder of SnC alloy phases；
Then the Ag powder that 100g granularities are 1 μm, purity is 99.95% is added into the alloy powder so that Ti2SnC alloys are being closed
Content in bronze is 10%.10%Ti will be contained2The alloy for dental amalgam of SnC alloy phases is under conditions of rotating speed is 100 rev/min
Ball milling 0.5h so that silver parcel Ti3SnC2Alloy phase powder is well mixed with silver powder.Well mixed 120gAg alloyed powders are loaded
In mould, ingot blank is pressed under the conditions of pressing pressure is 600MPa.Ingot blank is put into high purity graphite mould, graphite jig is put
Enter in vacuum sintering furnace, 5 × 10 are reached in vacuum-3During Pa, 950 DEG C are warming up to 10 DEG C/min heating rate, and be incubated
Semisolid liquid-phase sintering is carried out under conditions of 20min, then ingot blank is taken out after furnace cooling.It is in squeeze pressure by ingot blank finally
Round bar, oval rod or square rod-shaped articles are squeezed under the conditions of 800MPa.
Embodiment 3：
Such as Fig. 1 technological process, specific implementation process is：According to containing 60%Ti3AlC2The alloy for dental amalgam of alloy phase, claims
It is the Ti that 800nm, purity are 99.9% to take 18g granularities3SiC2The Ag powder that alloyed powder and 12g granularities are 4 μm, purity is 99.95%
It is put into agate pot；Simultaneously according to ratio of grinding media to material 3:1 ratio adds agate ball into agate pot, in 500 revs/min of rotating speed, protects
Mechanical alloying processing is carried out under conditions of holding 20 hours, 1000nm or so silver parcel Ti is obtained3AlC2The powder of alloy phase；
Then the Ag powder that 170g granularities are 4 μm, purity is 99.95% is added into the alloy powder so that Ti3AlC2Alloy is being closed
Content in bronze is 9%.9%Ti will be contained3AlC2The alloy for dental amalgam of alloy phase ball under conditions of rotating speed is 100 rev/min
Grind 0.5h so that silver parcel Ti3AlC2Alloy phase powder is well mixed with silver powder.Well mixed 200gAg alloyed powders are loaded into mould
In tool, ingot blank is pressed under the conditions of pressing pressure is 500MPa.Ingot blank is put into high purity graphite mould, graphite jig is put into
In vacuum sintering furnace, 5 × 10 are reached in vacuum-3During Pa, 960 DEG C are warming up to 15 DEG C/min heating rate, and be incubated
Semisolid liquid-phase sintering is carried out under conditions of 10min, then ingot blank is taken out after furnace cooling.It is in squeeze pressure by ingot blank finally
Round bar, oval rod or square rod-shaped articles are squeezed under the conditions of 1200MPa.
Claims (2)
1. silver medal MAX phase sliding contact material preparation methods, it is characterised in that：Using mechanical alloying+semisolid liquid-phase sintering
Technology prepares silver-colored MAX phases sliding contact material product, 0.1-10 μm of particle of silver parcel MAX phases, then by shaping
The semisolid liquid-phase sintering of ingot blank is obtained, and wherein MAX phases refer to Ti3AlC2Or Ti2SnC。
2. silver-colored MAX phases sliding contact material preparation method according to claim 1, it is characterised in that：Described use
Mechanical alloying+semisolid liquid phase sintering technology is concretely comprised the following steps：
(1) MAX phases percentage by weight will be contained to be put into agate pot for 60% silver medal mixed powder, be 1 according to ratio of grinding media to material:1、2:1 or 3:1
Ratio be put into agate ball, then with 200-500 revs/min, keep 5-20 hour condition progress mechanical alloying processing, with
Obtain the powder of 0.1-10 μm of silver parcel MAX phases；
(2) 1-5 μm of silver powder is added in the powder for being obtained (1) so that the percentage by weight of content of the MAX phases in silver is 3-
20%, then handled through overmulling powder so that silver parcel MAX phase powder is well mixed with silver powder；
(3) powder being well mixed in (2) is fitted into mould, base is pressed under the conditions of pressing pressure is 300-600MPa
Body；
(4) base substrate in (3) is fitted into high purity graphite mould, be then placed in vacuum sintering furnace, it is 10 to keep vacuum-3Pa
Under the conditions of, 940-960 DEG C is warming up to 10-20 DEG C/min heating rate, 10-50min is incubated, then taken out after furnace cooling
Ingot blank；
(5) round bar, oval rod or square shaft-like production are squeezed under the conditions of squeeze pressure 600-1200MPa to the ingot blank in (4)
Product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710325197.XA CN107254598A (en) | 2017-05-10 | 2017-05-10 | A kind of preparation method of silver-colored MAX phases sliding contact material |
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| CN201710325197.XA CN107254598A (en) | 2017-05-10 | 2017-05-10 | A kind of preparation method of silver-colored MAX phases sliding contact material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797307A (en) * | 2019-01-09 | 2019-05-24 | 东南大学 | A kind of Ag/C@Ti3AlC2The preparation method of contact material |
| CN109852837A (en) * | 2019-01-11 | 2019-06-07 | 东南大学 | A kind of preparation method of Ag/MAX contact material |
| CN110016583A (en) * | 2018-11-16 | 2019-07-16 | 贵研铂业股份有限公司 | A kind of gold-ceramics electrical contact composite material and preparation method |
| CN110499435A (en) * | 2019-09-20 | 2019-11-26 | 昆明贵金属研究所 | A kind of silver-based electric contact material and preparation method thereof |
| CN115740465A (en) * | 2022-12-13 | 2023-03-07 | 温州中希电工合金有限公司 | Silver tin oxide contact material and preparation method thereof |
| CN115927899A (en) * | 2022-12-13 | 2023-04-07 | 温州中希电工合金有限公司 | Silver copper oxide contact material and preparation method thereof |
| CN115927900A (en) * | 2022-11-17 | 2023-04-07 | 东北大学 | Ag-Ti 3 SiC 2 Component regulation and control method of electric contact material |
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| CN1552926A (en) * | 2003-06-04 | 2004-12-08 | 中国科学院金属研究所 | Silver-base electric contact head materials |
| CN101343700A (en) * | 2008-08-25 | 2009-01-14 | 倪树春 | Ag/Ti3SiC2 electric contact material and manufacturing process |
| CN102312150A (en) * | 2011-09-29 | 2012-01-11 | 浙江大学 | Preparation method of Ag / Ti3SiC2 electric contact composite material |
| CN106498206A (en) * | 2016-09-28 | 2017-03-15 | 东南大学 | A kind of Ti3SiC2Strengthen the preparation method of Ag base electric contact materials |
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| CN1542149A (en) * | 2003-04-29 | 2004-11-03 | 中国科学院金属研究所 | Long lasting and self-lubricating silver-based electric contact material |
| CN1552926A (en) * | 2003-06-04 | 2004-12-08 | 中国科学院金属研究所 | Silver-base electric contact head materials |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016583A (en) * | 2018-11-16 | 2019-07-16 | 贵研铂业股份有限公司 | A kind of gold-ceramics electrical contact composite material and preparation method |
| CN110016583B (en) * | 2018-11-16 | 2021-07-09 | 贵研铂业股份有限公司 | Gold-ceramic electric contact composite material and preparation method thereof |
| CN109797307A (en) * | 2019-01-09 | 2019-05-24 | 东南大学 | A kind of Ag/C@Ti3AlC2The preparation method of contact material |
| CN109797307B (en) * | 2019-01-09 | 2020-08-11 | 东南大学 | Ag/C @ Ti3AlC2Preparation method of contact material |
| CN109852837A (en) * | 2019-01-11 | 2019-06-07 | 东南大学 | A kind of preparation method of Ag/MAX contact material |
| CN110499435A (en) * | 2019-09-20 | 2019-11-26 | 昆明贵金属研究所 | A kind of silver-based electric contact material and preparation method thereof |
| CN115927900A (en) * | 2022-11-17 | 2023-04-07 | 东北大学 | Ag-Ti 3 SiC 2 Component regulation and control method of electric contact material |
| CN115927900B (en) * | 2022-11-17 | 2024-06-07 | 东北大学 | Ag-Ti3SiC2Component regulation method of electric contact material |
| CN115740465A (en) * | 2022-12-13 | 2023-03-07 | 温州中希电工合金有限公司 | Silver tin oxide contact material and preparation method thereof |
| CN115927899A (en) * | 2022-12-13 | 2023-04-07 | 温州中希电工合金有限公司 | Silver copper oxide contact material and preparation method thereof |
| CN115740465B (en) * | 2022-12-13 | 2023-08-18 | 温州中希电工合金有限公司 | Silver tin oxide contact material and preparation method thereof |
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