CN109930021A - A kind of copper-based silicon dioxide composite material and preparation method thereof - Google Patents
A kind of copper-based silicon dioxide composite material and preparation method thereof Download PDFInfo
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- CN109930021A CN109930021A CN201711376253.9A CN201711376253A CN109930021A CN 109930021 A CN109930021 A CN 109930021A CN 201711376253 A CN201711376253 A CN 201711376253A CN 109930021 A CN109930021 A CN 109930021A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 61
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000010949 copper Substances 0.000 title claims abstract description 54
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- 238000000498 ball milling Methods 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 229910052681 coesite Inorganic materials 0.000 claims description 11
- 229910052906 cristobalite Inorganic materials 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052682 stishovite Inorganic materials 0.000 claims description 11
- 229910052905 tridymite Inorganic materials 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- 229910021382 natural graphite Inorganic materials 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract description 4
- 241000784732 Lycaena phlaeas Species 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 20
- 239000004615 ingredient Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000280 densification Methods 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 238000000713 high-energy ball milling Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004377 microelectronic Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000009747 press moulding Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- -1 compound aluminum oxide Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- VDGJOQCBCPGFFD-UHFFFAOYSA-N oxygen(2-) silicon(4+) titanium(4+) Chemical compound [Si+4].[O-2].[O-2].[Ti+4] VDGJOQCBCPGFFD-UHFFFAOYSA-N 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
- 239000002210 silicon-based material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of copper-based silicon dioxide composite materials and preparation method thereof, belong to metal material and its preparation technical field.The mass percentage composition of the composite material are as follows: tin: 0.5~10%, graphite: 10~25%, silica: 2~8%, nano silica: 0~2%, surplus is copper.Preparation step are as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product.Cu-base composites tensile strength prepared by the present invention is higher than 300MPa, and yield strength is suitable with common copper-based Al 2 O 3 composition, and wear rate is lower than 1 × 10‑9cm3·J‑1, for heat-resistance coefficient higher than 35000, heat resistance and wear-resisting property are more preferable than copper-based Al 2 O 3 composition, therefore the wear part of material production can meet the needs of product or equipment work normally for a long time under higher temperature conditions.
Description
Technical field
The present invention relates to a kind of copper-based silicon dioxide composite materials and preparation method thereof, in particular to a kind of to rub in high temperature height
The alloy and preparation method thereof used under environment is wiped, metal material and its preparation technical field are belonged to.
Background technique
Cu-base composites are used as aircraft, automobile, steamer and engineering machine due to its good wearability, thermal conductivity etc.
The brake of tool etc. and brake apparatus are widely used in the high-tech sectors such as electromechanics, aerospace, microelectronics.Both at home and abroad to being applied under high temperature
Cu-base composites research it is long-standing, and formd copper-base composite oxidate, carbide, boride and nitride etc.
Industrialize series of products.
As equipment is to high speed, overload direction development, wearability and heat resistance to copper base friction material propose higher
It is required that.The result of study of Cu-base composites shows: using nanometer Al2O3, nanometer ZrO2Equal nano-scale oxides increase as disperse
The copper-based nano composite material mutually prepared by force forms the hard of Dispersed precipitate using particle enhancing technology in soft tough Cu matrix
Particle improves intensity, the wearability of material, while being able to maintain copper itself high thermal conductivity, improves softening properties resistant to high temperatures,
Achieve the effect that conductive and intensity, wear-resisting property are comprehensive to improve, has the advantages that other intensifying methods are incomparable.Therefore, will
Nanometer oxide material is applied to copper-based wear-resistant material, provides new way to improve the tribological property of wear-resistant material.
According to data at home and abroad, studying at present more is Cu/Al2O3Composite material.Nano-meter SiO_22(n-SiO2) due to it
Special structure and there is the characteristics such as light weight, wear-resisting, high temperature resistant, corrosion-resistant and thermal expansion coefficient be small, thermally conductive, electric conductivity
Although being declined, higher level is remained at, and its price is only nanometer Al2O3Half.However, due to n-
SiO2Easily reunite, be not easy in Copper substrate evenly dispersed, leads to the SiO prepared2Enhance Cu-base composites performance and Cu/
Al2O3Composite material is compared to having no advantage, therefore by n-SiO2It is not much and sees for the research of Copper substrate as reinforced phase.
In recent years, Cu-base composites are increasingly used in every field as wear part.Therefore, it develops
A kind of copper-based silicon dioxide composite material with higher-strength, high-wearing feature, low cost used under high temperature environment, is allowed to
Applied to the manufacture of the fields such as aerospace, automobile hot environment brake parts, raising product quality and equipment are used
There is great meaning in service life etc..
Summary of the invention
First problem to be solved by this invention is to provide a kind of with excellent mechanical performance, antiwear heat resisting performance, height
Conductive, low-density copper-based silicon dioxide composite material, is allowed to for industry fields such as aerospace, vehicular traffic, microelectronics.
Second Problem to be solved by this invention, which is to provide, a kind of has excellent mechanical performance, antiwear heat resisting performance, low
The preparation method of density, highly conductive copper-based silicon dioxide composite material.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of copper-based silicon dioxide composite material, i.e., a kind of nano silica enhance Cu-base composites, quality hundred
Divide than composition are as follows: tin: 0.5~10%, graphite: 10~25%, silica: 2~8%, nano silica: 0~2%, it is remaining
Amount is copper.
Preferably, the mass percentage composition of above-mentioned Cu-base composites are as follows: tin: 1~5%, graphite: 17~20%, two
Silica: 3~6%, nano silica: 0.3~1.5%, surplus is copper.
Wherein, mass percent≤0.1% of inevitable impurity.
Role is as follows in the composite for the above components element:
Graphite: graphite has the function of improving Cu-base composites greasy property, especially high temperature lubrication property, but graphite
Matter is soft, so excessive addition can reduce the mechanical property of composite material.
Tin: on the one hand, tin can accelerate matrix densification process；On the other hand, tin cooperates with lubrication with excellent with graphite
Effect, the antifriction performance of medium Copper-Graphite Composite can be greatly improved in Jia Xi, while the collaboration lubricating action of tin and graphite exists most
Good cooperation, we are experiments have shown that Sn/ graphite quality ratio in 0.5~30 range, can obtain preferable collaboration lubricating action.
Silica: have the function of improving wearability, hardness and anti stick to Cu-base composites.
Nano silica: n-SiO2The high temperature resistance and wear-resisting property of Cu-base composites can be improved, simultaneously because
Its nano effect can effectively hinder dislocation motion and Grain Boundary Sliding, have the function of significantly improving matrix strength；On the other hand, n-
SiO2With SiO2The consistency of composite material can be improved in coupling.
Inventive silica enhances the preparation method of Cu-base composites, mainly includes raw material mixing, cold-press moulding, most
The technique of pressure sintering afterwards, specific steps include: the preparation method of copper-based silicon dioxide composite material, include the following steps: to match
Than weighing powder, by copper powder and nano silica the mixed powder ball milling in planetary high-energy ball mill in advance, later by it with
Other all raw materials are placed in small-sized V-type batch mixer together and are uniformly mixed, and powder is then pressed into briquet in punching block；Finally
Green compact is sintered in bell-type furnace.
In the present invention, with cathode copper, atomization tin powder, flake natural graphite, micron silica and nanometer titanium dioxide
Silicon is raw material.The quality of used raw material is as follows: electrolytic copper powder average particle size≤74 μm, purity >=99.9wt%；Atomized tin
The average particle size of powder is 40~50 μm, purity >=98wt%；Flake natural graphite average particle size is 140~160 μm, purity >=
99wt%；Micron order SiO2Average particle size is 40~50 μm, moisture content≤1wt%；Nano-meter SiO_22Average grain diameter be 20~
40nm。
Firstly, by copper powder and nano silica in planetary high-energy ball mill 2~4h of ball milling, then with other raw materials
3~5h is remixed in V-type batch mixer together；The density for being pressed into briquet is 4~5g/cm3；Green compact is sintered in bell-type furnace
When, sintering pressure is 1.0~4.0MPa, and sintering temperature is 800~1000 DEG C, and average heating rate is 4~7 DEG C/min, is being burnt
Hydrogen reduction protective atmosphere is used during knot, sintering time is 20~40min, and finally furnace is cooled under protective atmosphere
Finished product is made in room temperature.
300~500MPa of tensile strength of the copper-based silicon dioxide composite material of the present invention, yield strength is 200~
300MPa, elongation are 5~15%, and dynamic friction coefficient is 0.054~0.080, confficient of static friction 0.12~0.15, wear rate
0.3~1.0 × 10-9cm3·J-1, heat-resistance coefficient 35000~50000, opposite heat resistance 1.0~1.5,5.5~8g of density
cm3, resistivity 1.8~2.8 × 10-8Ω m, 50~85Hv of hardness.Compared with copper-based Al 2 O 3 composition, the present invention
The tensile mechanical properties of prepared copper-based silicon dioxide composite material are suitable, and heating conduction, wear-resisting property are preferable, while at
This is lower.
Compared with prior art, advantages of the present invention are as follows:
(1) present invention improves the mechanical property, wear-resisting of alloy by addition micron silica, nanomorphic silica
Performance and heat resistance；Wear-resisting property can be improved in the addition of tin, accelerates matrix densification process；Graphite particle can be to Copper substrate
Dispersion-strengtherning is played, and graphite has self-lubricating function and good heat resistance, improves the hardness of Copper substrate.Free state
Hard nanometer particle is being can be distributed in friction process between friction pair, is played " ball effect ", is reduced friction factor and abrasion
Rate.Work as n-SiO2Particle is distributed evenly in the matrix of copper base friction material, can effectively hinder dislocation motion and crystal boundary sliding
It moves, improves the intensity and heat resistance of matrix.Copper-based silicon dioxide composite material designed by the present invention has good processability
Can, compared with copper-based Al 2 O 3 composition, heat-resisting and wearability is more preferable.
(2) present invention keeps nano silica evenly dispersed in Copper substrate by preparatory high-energy ball milling, and it is multiple to reach raising
The purpose of condensation material comprehensive performance.
(3) the copper-based silicon dioxide composite material prepared by the present invention, cost are lower.
Specific embodiment
Below in conjunction with example, present invention is further described in detail.
The preparation method of the copper-based silicon dioxide composite material of the present invention, preparation step are as follows: ingredient-high-energy ball milling-is mixed
Material-cold moudling-pressure sintering-finished product.Its specific process step includes:
(1) high-energy ball milling: by load weighted electrolytic copper powder (average particle size≤74 μm, purity >=99.9wt%), nanoscale
SiO2(average grain diameter is 20~40nm) is placed in planetary high-energy ball mill 2~4h of preparatory ball milling.
(2) raw material mixes: by copper-Nano-meter SiO_2 after ball milling2Mixed powder, atomization tin powder (average particle size be 40~50 μm,
Purity >=98wt%), flake natural graphite (average particle size be 140~160 μm, purity >=99wt%), micron order SiO2It is (flat
Equal granularity is 40~50 μm, moisture content≤1wt%) it is placed in 3~5h of mixing in small-sized V-type batch mixer；Employed in embodiment
The quality of raw material is same as above.
(2) cold-press moulding: it is 4~5g/cm that powder, which is pressed into density, in the punching block of Ф 26mm × 6.5mm3Briquet；
(3) pressure sintering: green compact is sintered under 1.0~4.0MPa pressure in bell-type furnace, sintering temperature be 800~
1000 DEG C, average heating rate is 4~7 DEG C/min, uses hydrogen reduction protective atmosphere during the sintering process, and sintering time is
20~40min, furnace is cooled to room temperature under last protective atmosphere, and finished product is made.
Embodiment 1
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
3h is placed in small-sized V-type batch mixer with other raw materials mixes 3h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 1.0MPa pressure in bell-type furnace, sintering temperature is 980 DEG C, is put down
Equal heating rate is 6 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 40min is finally being protected
Furnace is cooled to room temperature under property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 2
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
2h is placed in small-sized V-type batch mixer with other raw materials mixes 5h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 2.5MPa pressure in bell-type furnace, sintering temperature is 900 DEG C, is put down
Equal heating rate is 5 DEG C/min, uses hydrogen reduction protective atmosphere during the sintering process, and sintering time 35min finally exists
Furnace is cooled to room temperature under protective atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 3
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
4h is placed in small-sized V-type batch mixer with other raw materials mixes 5h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 3.5MPa pressure in bell-type furnace, sintering temperature is 800 DEG C, is put down
Equal heating rate is 5 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 40min is finally being protected
Furnace is cooled to room temperature under property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 4
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
3h is placed in small-sized V-type batch mixer with other raw materials mixes 3h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 2.0MPa pressure in bell-type furnace, sintering temperature is 850 DEG C, is put down
Equal heating rate is 6 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 30min is finally being protected
Furnace is cooled to room temperature under property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 5
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
3h is placed in small-sized V-type batch mixer with other raw materials mixes 4h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 3.0MPa pressure in bell-type furnace, sintering temperature is 950 DEG C, is put down
Equal heating rate is 6 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 35min is finally being protected
Furnace is cooled to room temperature under property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 6
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
3h is placed in small-sized V-type batch mixer with other raw materials mixes 3h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 1.0MPa pressure in bell-type furnace, sintering temperature is 1000 DEG C,
Average heating rate is 4 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 25min is finally being protected
Furnace is cooled to room temperature under shield property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
Embodiment 7
Its technological process of production method is as follows: ingredient-ball milling-mixing-cold moudling-pressure sintering-finished product
Detailed process are as follows: by ingredient composition shown in table 1, by copper and Nano-meter SiO_22Mixed powder ball milling in high energy ball mill
3h is placed in small-sized V-type batch mixer with other raw materials mixes 3h later；?Punching block in powder is suppressed
It is 4~5g/cm at density3Briquet；Green compact is sintered under 4.0MPa pressure in bell-type furnace, sintering temperature is 800 DEG C, is put down
Equal heating rate is 7 DEG C/min, uses restitutive protection's atmosphere during the sintering process, and sintering time 40min is finally being protected
Furnace is cooled to room temperature under property atmosphere, and finished product is made.Prepared end properties is as shown in table 2.
A kind of copper-based silicon dioxide composite material of table 1 at being grouped as (wt.%)
The performance of table 2 embodiment and common Cu-base composites
The present invention finally improves alloy by addition tin, graphite, micron silica and nanometer grade silica
Comprehensive mechanical property, wear-resisting and heat resistance, while guaranteeing that alloy has good processing performance；Pass through the side of powder metallurgy
Method finally can get copper-based dioxide composite silicon materials.
As shown in table 2, the Cu-base composites tensile strength prepared by the present invention is higher than 300MPa, yield strength and common
Copper-based compound aluminum oxide material it is suitable, wear rate be lower than 1.6 × 10-9cm3·J-1, heat-resistance coefficient is higher than 27900, resistance
Rate is lower than 3.2 × 10-8cm3·J-1, density is lower than 8gcm3, heat resistance and wear-resisting property are than copper-based aluminum oxide composite wood
Material is more preferable, therefore the wear part of material production can meet what product or equipment worked normally for a long time under higher temperature conditions
Demand.
The present invention includes but is not limited to above embodiments, it is all carried out under the spirit and principles in the present invention it is any etc.
With replacement or local improvement, all will be regarded as within protection scope of the present invention.
Claims (9)
1. a kind of copper-based silicon dioxide composite material, it is characterised in that: its mass percentage composition are as follows: tin: 0.5~10%, stone
Ink: 10~25%, silica: 2~8%, nano silica: 0~2%, surplus is copper.
2. copper-based silicon dioxide composite material according to claim 1, it is characterised in that: the quality hundred of the composite material
Divide than composition are as follows: tin: 1~5%, graphite: 17~20%, silica: 3~6%, nano silica: 0.3~1.5%, it is remaining
Amount is copper.
3. copper-based silicon dioxide composite material according to claim 2, it is characterised in that: the composite material also includes miscellaneous
Matter, mass percent≤0.1% of impurity.
4. the preparation method of copper-based silicon dioxide composite material according to any one of claim 1-3, including walk as follows
Rapid: proportion weighs powder, by copper powder and the mixed powder of the nano silica ball milling in planetary high-energy ball mill in advance, then
It is placed in V-type batch mixer and is uniformly mixed together with other raw materials, powder is then pressed into briquet in punching block；Finally by green compact
It is sintered in bell-type furnace.
5. the preparation method of copper-based silicon dioxide composite material according to claim 4, it is characterised in that: the raw material of use
For cathode copper, atomization tin powder, flake natural graphite, micron silica and nano silica.
6. the preparation method of copper-based silicon dioxide composite material according to claim 5, it is characterised in that: electrolytic copper powder is flat
Equal granularity≤74 μm, purity >=99.9wt%；The average particle size of atomization tin powder is 40~50 μm, purity >=98wt%；Flakey
Natural graphite average particle size is 140~160 μm, purity >=99wt%；Micron order SiO2Average particle size is 40~50 μm, and moisture contains
Amount≤1wt%；Nano-meter SiO_22Average grain diameter is 20~40nm.
7. the preparation method of copper-based silicon dioxide composite material according to claim 4, it is characterised in that: copper powder and nanometer
Ball-milling Time of the silica in planetary high-energy ball mill is 2~4h, mixed in V-type batch mixer together with other raw materials
The conjunction time is 3~5h.
8. the preparation method of copper-based silicon dioxide composite material according to claim 4, it is characterised in that: the briquet
Density is 4~5g/cm3。
9. the preparation method of copper-based silicon dioxide composite material according to claim 4, it is characterised in that: by green compact in clock
When being sintered in cover furnace, sintering pressure is 1.0~4.0MPa, and sintering temperature is 800~1000 DEG C, and average heating rate is 4~7
DEG C/min, hydrogen reduction protective atmosphere is used during the sintering process, and sintering time is 20~40min, finally in protectiveness gas
Furnace is cooled to room temperature under atmosphere.
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| CN113025284A (en) * | 2021-03-12 | 2021-06-25 | 中国矿业大学 | Medium-high temperature nano composite metal phase change heat storage material and preparation method thereof |
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| JPH02283922A (en) * | 1989-04-21 | 1990-11-21 | Toshiba Tungaloy Co Ltd | Sintered friction material having two layer structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113025284A (en) * | 2021-03-12 | 2021-06-25 | 中国矿业大学 | Medium-high temperature nano composite metal phase change heat storage material and preparation method thereof |
| CN113025284B (en) * | 2021-03-12 | 2021-08-20 | 中国矿业大学 | Medium-high temperature nano composite metal phase change heat storage material and preparation method thereof |
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