CN105508479A - High abrasion resistance and high thermal conductivity brake pad and production method thereof - Google Patents
High abrasion resistance and high thermal conductivity brake pad and production method thereof Download PDFInfo
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- CN105508479A CN105508479A CN201610068414.7A CN201610068414A CN105508479A CN 105508479 A CN105508479 A CN 105508479A CN 201610068414 A CN201610068414 A CN 201610068414A CN 105508479 A CN105508479 A CN 105508479A
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- 238000005299 abrasion Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title 1
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 122
- 239000010432 diamond Substances 0.000 claims abstract description 122
- 150000001336 alkenes Chemical class 0.000 claims abstract description 119
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000009396 hybridization Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 24
- 150000001721 carbon Chemical group 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 241000446313 Lamella Species 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 40
- 239000000463 material Substances 0.000 abstract description 8
- 239000013078 crystal Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 125000004432 carbon atom Chemical group C* 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract 5
- 238000012360 testing method Methods 0.000 description 27
- 239000002113 nanodiamond Substances 0.000 description 18
- 229910002804 graphite Inorganic materials 0.000 description 13
- 239000010439 graphite Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 238000004880 explosion Methods 0.000 description 11
- 229910021389 graphene Inorganic materials 0.000 description 11
- 238000000498 ball milling Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 6
- NQTSTBMCCAVWOS-UHFFFAOYSA-N 1-dimethoxyphosphoryl-3-phenoxypropan-2-one Chemical compound COP(=O)(OC)CC(=O)COC1=CC=CC=C1 NQTSTBMCCAVWOS-UHFFFAOYSA-N 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 5
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- 238000000101 transmission high energy electron diffraction Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000001069 Raman spectroscopy Methods 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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- 239000006228 supernatant Substances 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000005004 MAS NMR spectroscopy Methods 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical group [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 239000008367 deionised water Substances 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000002086 nanomaterial Substances 0.000 description 1
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- 239000002071 nanotube Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the technical field of an abrasion resistance material and particularly relates to a high abrasion resistance and high thermal conductivity brake pad. The high abrasion resistance and high thermal conductivity brake pad comprises a substrate steel plate, wherein a friction block is arranged on the substrate steel plate, the friction block comprises a substrate layer connected with the substrate steel plate, and a diamond alkene friction layer is arranged don the substrate layer; the diamond alkene friction layer is produced by adopting nanometer diamond alkene in a layered single-crystal structure; carbon atoms in the same layer of the nanometer diamond alkene are connected with each other by an sp3 orbital hybridization carbon bond, and carbon atoms between layers of the nanometer diamond alkene are connected with each other by an sp2 hybridization carbon bond; the lattice spacing of the nanometer diamond alkene is 0.21nm; the average grain size of the nanometer diamond alkene is R which is more than or equal to 20nm and less than or equal to 500nm; and the carbon content of the nanometer diamond alkene is 99-100%. The high abrasion resistance and high thermal conductivity brake pad has the advantages that the abrasion resistance is high, the thermal conductivity is good, and the hardness is high.
Description
Technical field
The invention belongs to high-abrasive material technical field, relate to a kind of brake block, particularly a kind of high abrasion height heat conduction brake block and preparation method.
Background technique
In the brake system of automobile, electric motor car etc.; brake block is the most key breaking piece; brake block is also one of part the most easy to wear simultaneously, and the quality of brake block plays conclusive effect to braking effect, and can be described as brake block is car and people " patron saint ".Brake block structure is generally made up of steel plate, bonding thermal-protective coating and brake pad etc., as shown in accompanying drawing one, wherein brake pad is made up of friction material and binder, and during brake, brake block is extruded on brake disc or brake drum and produces friction, thus reaches the object of vehicle deceleration.Due to rubbing action, brake pad can be worn gradually, reduce the friction factor of brake block, the friction factor of brake block determines the size of vehicle braking force, the friction factor reduction of brake block can cause the decline of vehicle braking force, add the stopping distance of vehicle, certain threat is constituted to personal safety.During braking automobile, brake block can produce very large friction with brake disc or brake drum, friction can produce certain heat, brake-pad friction block is all generally that the poor material of heat conductivity is formed on the market at present, if these heats leave not in time, will assemble on brake block, make brake block deliquescing, greatly reduce the braking ability of brake block, want to reach same braking effect, must repeatedly brake, this creates the terminal heat more, will brake failure have been caused when brake block reaches uniform temperature, greatly threaten the life safety of passengers inside the car.Heat simultaneously on brake block also can be delivered in brake calipers and assembly thereof and brake oil, can accelerate the aging of brake caliper assemblies and brake oil is seethed with excitement, reducing braking effect.
Summary of the invention
The object of this invention is to provide that a kind of wear resistance is high, heat conduction good and the high abrasion height heat conduction brake block that hardness is high and preparation method.
For achieving the above object, the present invention by the following technical solutions: a kind of high abrasion height heat conduction brake block, comprise base steel sheet, base steel sheet is provided with brake pad, and brake pad comprises the base layer connected with base steel sheet, and base layer is provided with diamond alkene friction layer; Diamond alkene friction layer is made up of the nanometer diamond alkene of lamellar mono-crystalline structures; Being that sp3 orbital hybridization carbon bond connects between the carbon atom of the same lamella of nanometer diamond alkene, is that sp2 hydridization carbon bond connects between carbon atom between layers; The lattice pitch of nanometer diamond alkene is 0.21nm; The Mean particle diameter of nanometer diamond alkene is R, 20≤R≤500nm; The C content of nanometer diamond alkene is 99 ~ 100%.
Further, diamond alkene friction layer by Mean particle diameter be (10-20) nm, three kinds of nanometer diamond alkene of (100-250) nm, (350-500) nm make and the weight ratio of three kinds of nanometer diamond alkene for (1-2): (3-4): (4-5).
Further, the thickness of diamond alkene friction layer is 2-4cm.
The preparation method of high abrasion height heat conduction brake block: 1) choose three kinds of nanometer diamond alkene that Mean particle diameter is respectively (10-20) nm, (100-250) nm, (350-500) nm, weight ratio is (1-2): (3-4): (4-5), mixing; 2) weight ratio adding the nanometer diamond alkene after mixing with step 1) is the sodium silicate aqueous solution of 6%, stirs 30-60min; 3) put into baking oven after moulded section and carry out cascade baking, obtained diamond alkene friction layer; 4) by the base layer bonding for diamond alkene friction layer, form brake pad, then brake pad is bonded in base steel sheet, obtained finished product.
Further, in step 3), cascade baking procedure is as follows: a, be warmed up to 60 DEG C from normal temperature, insulation 30min; B, be warmed up to 80 DEG C from 60 DEG C, insulation 30min; C, be warmed up to 120 DEG C from 80 DEG C, insulation 60min; D, be warmed up to 180 DEG C from 120 DEG C, insulation 200min, cools to normal temperature, completes baking process; In above-mentioned steps, heating rate is 2 DEG C/min.
The preparation process of nanometer diamond alkene, comprises the following steps:
Pickling is purified: fine powder diamond raw material powder being broken into more than 8000 orders, adopts the concentrated sulphuric scid and red fuming nitric acid (RFNA) mixed solution, watery hydrochloric acid, hydrofluoric acid to this fine powder pickling successively, then use washed with de-ionized water to cleaning solution pH close to 7; Sorting: the material after cleaning is carried out centrifugation, gets supernatant liquid and carries out the sorting of 1-5 days precipitations, remove supernatant, by the nanometer diamond alkene that gets product after the drying of lower sediment thing.
Carry out ball milling shaping and airflow crash before acid pickling step, first the fines of more than 800 orders is sieved out in the ball milling shaping of diamond raw material; Again this fines is delivered in airflow crash machine and pulverizes and sieve out the fine powder of more than 8000 orders.
At ball milling shaping step, diamond sifts out the particle of more than 70 orders through the screen cloth of ball milling shaping barrel, and the broken time is 1-5h; This particle sieves out the fines of more than 800 orders through multistage vibrating sieving machine, and the sieve time of shaking is 30min-2h; At ball milling shaping step, fineves more than 800 orders sieved out repeats to sieve once; At ball milling shaping step, the coarse fodder below 70 orders returns ball milling shaping barrel and carries out again broken; Residue on sieve Returning flow disintegrator carries out again broken; In sorting step, centrifugation time is 30min-2h, and rotating speed is 8000rpm-15000rpm; The concentrated sulphuric scid and red fuming nitric acid (RFNA) mixed solution are that 5:1 mixes by mass fraction to be 98% concentrated sulphuric scid and mass fraction be 10% red fuming nitric acid (RFNA) according to mass ratio; Adopting nanometer diamond alkene prepared by said method, is lamellar mono-crystalline structures, is that sp3 orbital hybridization carbon bond connects between the carbon atom of same lamella, is that sp2 hydridization carbon bond connects between carbon atom between layers; Granularity is 20-500nm, and C content is 99 ~ 100%, and lattice pitch is 0.21nm.
Compared with prior art, beneficial effect of the present invention is as follows: select and to vary in size and the object of the diamond alkene of different proportion makes diamond alkene friction layer fine and close exactly, friction effect is good, diamond alkene is the super hard nano material that diamond is formed, it is high that it has hardness, wear resistance is high, the advantage that thermal conductivity is high, it is high that diamond alkene has wear resistance as the friction layer of automobile brake sheet, the feature that thermal diffusivity is high, the heat dissipation rate of diamond alkene is the highest in known materials, will soon diffuse in ambient air at the fricative heat with brake disc or brake drum, heat cannot be assembled on brake block, there is the advantage that wear resistance is high simultaneously, improve the friction factor of automobile brake sheet, improve the braking ability of automobile, improve the working life of brake block, simultaneously compared with semipermanent mold brake block, noise obviously reduces, owing to there is no metal in friction layer, the wearing and tearing of brake disc are also reduced greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 in the present invention;
Fig. 2 is the XRD spectra of nanometer diamond alkene;
Fig. 3 is the tem analysis figure of nanometer diamond alkene;
Fig. 4 is the MAS-NMR spectrogram of nanometer diamond alkene;
Fig. 5 is the atomic orbital schematic diagram of nanometer diamond alkene;
Fig. 6 is the Raman spectrum of nanometer diamond alkene;
Fig. 7 tests 2 effects, the 3 effect test curve figure of 1 group in stable friction factor test;
Fig. 8 tests 2 effects, the 3 effect test curve figure of 2 groups in stable friction factor test.
Embodiment
Embodiment 1
A kind of high abrasion height heat conduction brake block, as shown in Figure 1, comprise base steel sheet 1, base steel sheet 1 is provided with brake pad, and brake pad comprises the base layer 2 connected with base steel sheet 1, and base layer 2 is provided with diamond alkene friction layer 3; Diamond alkene friction layer 3 is made up of the nanometer diamond alkene of lamellar mono-crystalline structures; Being that sp3 orbital hybridization carbon bond connects between the carbon atom of the same lamella of nanometer diamond alkene, is that sp2 hydridization carbon bond connects between carbon atom between layers; The lattice pitch of nanometer diamond alkene is 0.21nm; The C content of nanometer diamond alkene is 99 ~ 100%.Three kinds of nanometer diamond alkene that diamond alkene friction layer 3 is 20nm, 200nm, 500nm by Mean particle diameter make and the weight ratio of three kinds of nanometer diamond alkene is 2:3:5.The thickness of diamond alkene friction layer 3 is 2cm.
Embodiment 2
A kind of high abrasion height heat conduction brake block, comprise base steel sheet, base steel sheet is provided with brake pad, and brake pad comprises the base layer connected with base steel sheet, and base layer is provided with diamond alkene friction layer; Diamond alkene friction layer is made up of the nanometer diamond alkene of lamellar mono-crystalline structures; Being that sp3 orbital hybridization carbon bond connects between the carbon atom of the same lamella of nanometer diamond alkene, is that sp2 hydridization carbon bond connects between carbon atom between layers; The lattice pitch of nanometer diamond alkene is 0.21nm; The C content of nanometer diamond alkene is 99 ~ 100%.Three kinds of nanometer diamond alkene that diamond alkene friction layer is 10nm, 100nm, 400nm by Mean particle diameter make and the weight ratio of three kinds of nanometer diamond alkene is 2:4:4.The thickness of diamond alkene friction layer is 4cm.
Embodiment 3
A kind of high abrasion height heat conduction brake block, comprise base steel sheet, base steel sheet is provided with brake pad, and brake pad comprises the base layer connected with base steel sheet, and base layer is provided with diamond alkene friction layer; Diamond alkene friction layer is made up of the nanometer diamond alkene of lamellar mono-crystalline structures; Being that sp3 orbital hybridization carbon bond connects between the carbon atom of the same lamella of nanometer diamond alkene, is that sp2 hydridization carbon bond connects between carbon atom between layers; The lattice pitch of nanometer diamond alkene is 0.21nm; The C content of nanometer diamond alkene is 99 ~ 100%.Three kinds of nanometer diamond alkene that diamond alkene friction layer is 20nm, 250nm, 350nm by Mean particle diameter make and the weight ratio of three kinds of nanometer diamond alkene is 1:3:4.The thickness of diamond alkene friction layer is 3cm.
Embodiment 4
The preparation method of high abrasion height heat conduction brake block: 1) choose three kinds of nanometer diamond alkene that Mean particle diameter is respectively 20nm, 200nm, 500nm, weight ratio is 2:3:5, mixing; 2) weight ratio adding the nanometer diamond alkene after mixing with step 1) is the sodium silicate aqueous solution of 6%, stirs 60min; 3) put into baking oven after moulded section and carry out cascade baking, obtained diamond alkene friction layer; 4) by the base layer bonding for diamond alkene friction layer, form brake pad, then brake pad is bonded in base steel sheet, obtained finished product.In step 3), cascade baking maximum temperature is 180 DEG C, and cascade baking procedure is as follows: a, be warmed up to 60 DEG C from normal temperature, insulation 30min; B, be warmed up to 80 DEG C from 60 DEG C, insulation 30min; C, be warmed up to 120 DEG C from 80 DEG C, insulation 60min; D, be warmed up to 180 DEG C from 120 DEG C, insulation 200min, cools to normal temperature, completes baking process; In above-mentioned steps, heating rate is 2 DEG C/min.
Embodiment 5
The preparation method of high abrasion height heat conduction brake block: 1) choose three kinds of nanometer diamond alkene that Mean particle diameter is respectively 10nm, 100nm, 350nm, weight ratio is 2:4:4, mixing; 2) weight ratio adding the nanometer diamond alkene after mixing with step 1) is the sodium silicate aqueous solution of 6%, stirs 30min; 3) put into baking oven after moulded section and carry out cascade baking, obtained diamond alkene friction layer; 4) by the base layer bonding for diamond alkene friction layer, form brake pad, then brake pad is bonded in base steel sheet, obtained finished product.In step 3), cascade baking procedure is as follows: a, be warmed up to 60 DEG C from normal temperature, insulation 30min; B, be warmed up to 80 DEG C from 60 DEG C, insulation 30min; C, be warmed up to 120 DEG C from 80 DEG C, insulation 60min; D, be warmed up to 180 DEG C from 120 DEG C, insulation 200min, cools to normal temperature, completes baking process; In above-mentioned steps, heating rate is 2 DEG C/min.
Testing property of the present invention is as follows:
Contrast automobile brake sheet, semimetal class vehicle brake-holder block and the resinae vehicle brake-holder block two kinds of two types in the market.From thermal diffusivity, concerning the degree of wear of brake disc, semimetal class vehicle brake-holder block is very large to the wearing and tearing of brake disc, brake disc is easy to be worn, but comparatively resinae vehicle brake-holder block is strong for thermal diffusivity, on braking plate, heat is not easy to assemble, easily disperse, resinae vehicle brake-holder block is very little to the wearing and tearing of brake disc, but poor radiation, the heat produced in brake process cannot exhale in time, causes brake-block temperature to raise, and brake block braking ability is sharply reduced, need braking for a long time continuously, bring greatly potential safety hazard.Nanometer diamond alkene has wear-resisting, the advantage that thermal transpiration is high, and be nonmetal, greatly can extend the working life of automobile brake sheet, and the heat produced in brake process is also easy to exhale, a large amount of heats can not be caused to gather to be stayed on brake block, brake block braking ability is caused to reduce, simultaneously, in brake process, nanometer diamond alkene surface has part nanometer diamond alkene and changes into graphite, graphite is good oiling agent, while maintaining stronger friction factor, the wearing and tearing to brake disc can also be slowed down, extend the working life of a whole set of braking device.
Friction and wear test carries out on JF150D type fixed speed fricting test machine according to GB5763-1998, employing dish-block contact form, and mating plate is the disk of Φ 300mm, and material is gray cast iron.Select the brake block of embodiment 1 to be test 1 group, commercially available common brake block is test 2 groups, and specimen size is that 25mm × 25mm × 6mm, 25mm × 25mm face is as rubbing surface.Test conditions is: disc rotation speed is 480r/min, impacting force is 0.98MPa, total revolution is 5000r/min, probe temperature is respectively 100 DEG C, 150 DEG C, 200 DEG C, 250 DEG C, 300 DEG C, 350 DEG C, before and after test, employing precision is the thickness of the micrometer caliper measurement braking plate of 0.01mm, gets its arithmetic mean value and calculates wear rate.
Table 1 brake block polishing machine test chart
As can be seen from the above table, no matter be the stability of friction factor or the wear rate of material, test 1 group and be all better than test 2 groups.From the temperature-rise periods of 200 DEG C to 350 DEG C, test 2 groups and create larger heat fade, friction factor by 200 DEG C 0.44 be reduced to 350 DEG C 0.34, fall is to 22.7%, then because thermal diffusivity is good, friction factor is comparatively stable to test the brake block of 1 group of i.e. embodiment 1, and wear rate is all better than common commercially available brake block under condition of different temperatures, because nanometer diamond alkene wear resistance is high, improve the wear-resisting property of automobile brake sheet significantly.
On JF122 brake inertia platform experiment machine, 1:1 platform experiment is carried out according to automobile industry standard QC/T564-2008, speed gets 50 respectively, 100, 130km/h, brake-pipe pressure is 2, 4, 6, 8, 10MPa, to investigate brake block in friction speed, the stability of the friction factor under different pressures, select the brake block of embodiment 2 as test 1 group, common commercially available brake block is as test 2 groups, 2 effects of two kinds of brake blocks, 3 effect test curves are respectively as Fig. 7, shown in Fig. 8, from figure, we can find out significantly, the brake block that the efficacy curve testing the brake block of 1 group comparatively tests 2 groups is stablized, test the brake block of stability apparently higher than test 2 groups of the brake block friction factor of 1 group, show good speed and the coherence of pressure.
The testing property of nanometer diamond alkene is as follows:
(1) XRD analysis
Fig. 2 is a: explosion method Nano diamond; B: nanometer diamond alkene in the present invention; C: graphite; D: the XRD spectra of Graphene.
From the XRD spectra of Fig. 2, by x-ray powder diffraction instrument (CuK α-ray, tube voltage 40Kv, Tube current 40mA, λ=1.54056) test show, nanometer diamond alkene of the present invention in diffraction angle 2 θ=43.93 ° and 75.3 ° can see clearly diffraction peak, with typical diamond phase diffraction peak (111), (220) corresponding, can prove that novel nano diamond alkene of the present invention is the carbon nanosheet with diamond phase structure, the Nano diamond that the diffracted intensity of the diffracted primary peak (111) of novel nano diamond alkene of the present invention synthesizes much larger than explosion method can be found out from XRD spectra simultaneously, illustrate that the Nano diamond that diamond alkene crystallinity of the present invention is synthesized more than explosion method is strong.Can find out that Graphene and graphite can see diffraction peak significantly in diffraction angle 2 θ=26.3 ° simultaneously, corresponding with typical Graphene and graphite diffraction peak (002), to go out peak position different from novel nano diamond alkene of the present invention, this illustrates that novel nano diamond alkene of the present invention is formed mutually from the thing of graphite, Graphene is different, the peak position that goes out of the main diffraction peak of carbon nano-tube is set to 26.4 °, corresponding crystal face is (002), and this is also different from diamond alkene of the present invention.According to Scherrer formula D=, K is constant, β is halfwidth, diamond alkene grain size of the present invention is about 5 times of the Nano diamond of explosion method synthesis, this means that diamond alkene of the present invention distorts on atomic structure of carbon very little, crystallinity is good, because crystal grain is more little more easily produce distortion of lattice, this is for expanding the application area of Nano diamond advantageously.
(2) tem analysis
Fig. 3 is a: explosion method Nano diamond; B: novel nano diamond alkene of the present invention; C: graphite; D: the tem analysis figure of Graphene.Corresponding 1 is partial enlarged drawing, and 2 is corresponding HRTEM figure, and 1 figure upper left corner illustration is corresponding SAED figure.
Can find out that the pattern of nanometer diamond alkene of the present invention is different from other material with carbon element significantly by Fig. 3, and be a kind of multilayer chip structure, us are schemed as can be seen from the SAED in the 1 figure upper left corner, diamond alkene of the present invention is a kind of mono-crystalline structures, and Nano diamond prepared by explosion method is the particle composition of reuniting, and be polycrystalline structure, graphite and Graphene are sheet structure, this sheet structure is different from diamond alkene of the present invention, the length of a film of diamond alkene of the present invention is between 200-500nm, the length of a film of graphite and Graphene is more than 10 μm, and thickness is also than graphite, Graphene is thick.Us are schemed also as can be seen from SAED, although all present monocrystalline electron diffraction, but the SAED figure of graphite and Graphene is the SAED figure of typical hexagonal crystal system, and be different from diamond alkene prepared by the present invention, this illustrates that diamond alkene of the present invention has different crystalline structure from graphite, Graphene.
Can find out that lattice pitch is 0.21nm from HRTEM figure, close with diamond phase (111) face lattice pitch 0.206nm, this illustrates that the product of this sheet structure is all along (111) face, from figure, we it can also be seen that the Nano diamond that nanometer diamond alkene dispersiveness is prepared more than explosion method will be got well, and specific surface area is large, be more prone to adsorb other functional group from the teeth outwards, thus realize the functionalization to diamond surface, expand its application area.
(3) MASNMR analyzes
Fig. 4 is a: nanometer diamond alkene of the present invention, b: the MASNMR of explosion method Nano diamond analyzes.
Nanometer diamond alkene of the present invention is stratiform structure as seen from Figure 4, the Nano diamond of explosion method synthesis is made up of two kinds of different carbon C1 and C2, wherein C1 carbon to go out peak position different from diamond alkene of the present invention, this illustrates that the carbon atom arrangement inside these two kinds of Nano diamonds also exists certain difference.Nanometer diamond alkene of the present invention has the sp3 orbital hybridization carbon carbon structure different with two kinds, sp2 orbital hybridization carbon, be that sp3 orbital hybridization carbon bond connects between the carbon atom of same lamella, be that sp2 hydridization carbon bond connects between carbon atom between layers, make there are many vacant electron sites between layers, vacant electron site facilitates electronics freely to come in and go out, wherein, as shown in Figure 5, sp3 orbital hybridization carbon is the hydridization carbon of stereochemical structure, sp2 orbital hybridization carbon be plane structure hydridization carbon this be different from the carbon structure of the Nano diamond that explosion method is synthesized.And Graphene has a kind of two dimensional crystal structure, the Hexagon that its lattice is made up of six carbon atom, combination between carbon atom is sp2 orbital hybridization, graphite is the Hexagon of the six carbon atom composition of same layer, with layer carbon atom between combination be sp2 orbital hybridization formed chemical bond, and be connect by Van der Waals force between layers, carbon atom in nanotube is based on sp2 orbital hybridization, also there is certain bending simultaneously, certain sp3 hybrid bond can be formed, namely the chemical bond formed in same flexure plane has sp2 and sp3 mixed hybridization state simultaneously, the carbon atom arrangement of these material with carbon elements is all different from nanometer diamond alkene of the present invention.
(4) Raman spectrum analysis
Fig. 6 is the Raman spectrogram of nanometer diamond alkene, (a) particle diameter 250nm; (b) particle diameter 200nm; (c) particle diameter 100nm; (d) particle diameter 50nm.
As can be seen from Figure 6, the diamond alkene of stratiform structure of the different-grain diameter of synthesis has the similar Raman spectrogram of the Nano diamond of explosion method synthesis, but with its unlike, along with the change of sample particle diameter, also there is regular change in Raman spectrogram, the intensity at two main peak D peak and G peak is weakening gradually, this is mainly because the structure of sample itself there occurs change, sp2 carbon and sp3 carbon two kinds of carbon atoms constitute a kind of special dimeric structure, along with the change of sample particle diameter, this special dimeric structure content increases gradually and causes two main diffraction peak intensities to weaken gradually.
Claims (5)
1. a high abrasion height heat conduction brake block, comprise base steel sheet, base steel sheet is provided with brake pad, it is characterized in that: described brake pad comprises the base layer connected with base steel sheet, and base layer is provided with diamond alkene friction layer; Diamond alkene friction layer is made up of the nanometer diamond alkene of lamellar mono-crystalline structures; Being that sp3 orbital hybridization carbon bond connects between the carbon atom of the same lamella of nanometer diamond alkene, is that sp2 hydridization carbon bond connects between carbon atom between layers; The lattice pitch of nanometer diamond alkene is 0.21nm; The Mean particle diameter of nanometer diamond alkene is R, 20≤R≤500nm; The C content of nanometer diamond alkene is 99 ~ 100%.
2. high abrasion height heat conduction brake block as claimed in claim 1, is characterized in that: described diamond alkene friction layer by Mean particle diameter be (10-20) nm, three kinds of nanometer diamond alkene of (100-250) nm, (350-500) nm make and the weight ratio of three kinds of nanometer diamond alkene is (1-2): (3-4): (4-5).
3. high abrasion height heat conduction brake block as claimed in claim 2, is characterized in that: the thickness of described diamond alkene friction layer is 2-4cm.
4. the preparation method of the high abrasion height heat conduction brake block as described in as arbitrary in claim 1-3, it is characterized in that: 1) choose three kinds of nanometer diamond alkene that Mean particle diameter is respectively (10-20) nm, (100-250) nm, (350-500) nm, weight ratio is (1-2): (3-4): (4-5), mixing; 2) weight ratio adding the nanometer diamond alkene after mixing with step 1) is the sodium silicate aqueous solution of 6%, stirs 30-60min; 3) put into baking oven after moulded section and carry out cascade baking, obtained diamond alkene friction layer; 4) by the base layer bonding for diamond alkene friction layer, form brake pad, then brake pad is bonded in base steel sheet, obtained finished product.
5. the preparation method of high abrasion height heat conduction brake block as claimed in claim 4, is characterized in that: in step 3), cascade baking procedure is as follows: a, be warmed up to 60 DEG C from normal temperature, insulation 30min; B, be warmed up to 80 DEG C from 60 DEG C, insulation 30min; C, be warmed up to 120 DEG C from 80 DEG C, insulation 60min; D, be warmed up to 180 DEG C from 120 DEG C, insulation 200min, cools to normal temperature, completes baking process; In above-mentioned steps, heating rate is 2 DEG C/min.
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| US20040208817A1 (en) * | 2001-08-29 | 2004-10-21 | Michael Elbaum | Direct surface patterning of carbon |
| CN1798880A (en) * | 2003-05-30 | 2006-07-05 | 独立行政法人科学技术振兴机构 | Process for producing extremely flat microcrystalline diamond thin film by laser ablation method |
| CN101728449A (en) * | 2008-10-31 | 2010-06-09 | 宋健民 | Diamond-like carbon electronic device and manufacturing method thereof |
| CN204961650U (en) * | 2015-07-30 | 2016-01-13 | 王攀 | High strength brake block |
| CN105253883A (en) * | 2015-09-25 | 2016-01-20 | 郑州华晶金刚石股份有限公司 | Novel controllable laminar nano diamond ene |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040208817A1 (en) * | 2001-08-29 | 2004-10-21 | Michael Elbaum | Direct surface patterning of carbon |
| CN1798880A (en) * | 2003-05-30 | 2006-07-05 | 独立行政法人科学技术振兴机构 | Process for producing extremely flat microcrystalline diamond thin film by laser ablation method |
| CN101728449A (en) * | 2008-10-31 | 2010-06-09 | 宋健民 | Diamond-like carbon electronic device and manufacturing method thereof |
| CN204961650U (en) * | 2015-07-30 | 2016-01-13 | 王攀 | High strength brake block |
| CN105253883A (en) * | 2015-09-25 | 2016-01-20 | 郑州华晶金刚石股份有限公司 | Novel controllable laminar nano diamond ene |
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