CN102661342A - Producing method for carbon fiber reinforced ceramic matrix automobile brake pad - Google Patents
Producing method for carbon fiber reinforced ceramic matrix automobile brake pad Download PDFInfo
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- CN102661342A CN102661342A CN2012101314115A CN201210131411A CN102661342A CN 102661342 A CN102661342 A CN 102661342A CN 2012101314115 A CN2012101314115 A CN 2012101314115A CN 201210131411 A CN201210131411 A CN 201210131411A CN 102661342 A CN102661342 A CN 102661342A
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Abstract
The invention discloses a producing method for a carbon fiber reinforced ceramic matrix automobile brake pad. The method comprises the following steps of: preparing a carbon fiber mesh tire by a needling method; performing high temperature thermal process on the prepared carbon fiber mesh tire; preparing low-intensity carbon fiber reinforced matrix carbon (C/C) composite material by adopting an isothermal chemical vapor infiltration; machining the low-intensity C/C composite material, and performing directional infiltration in a high temperature vacuum furnace to prepare C/C-SiC brake linings; and then riveting the C/C-SiC braking linings with steel back to obtain the C/C-SiC braking pad used for the automobile braking system. The method provided by the invention has the advantages that the friction coefficient of the produced automobile brake pad is high and stable; the carbon fiber reinforced ceramic matrix automobile brake pad is low in wearing and good in heat fading performance; and thus, the method is simple and feasible.
Description
Technical field
The present invention relates to a kind of automobile brake sheet, the specifically a kind of brake block of the charcoal fiber reinforced ceramic-base friction material that is used for brake system of car and the processing of this brake block and with the connecting means of steel backing.
Background technique
Automobile brake sheet is the category-A key components and parts in brake system of car, and the quality of its performance is directly connected to the Security and the reliability of automobilism.Along with the raising of Hyundai Motor travelling speed, also more and more harsher to the requirement of automobile brake sheet.Because square being directly proportional of the energy that automobile brake sheet absorbs and speed; With the car is example; When braking with the speed of a motor vehicle of 50km/h, 100km/h and 200km/h respectively; The heat load of braking is respectively 282.61kJ, 1130.44kJ and 4521.74kJ, and the surface temperature of automobile brake sheet is up to 500～700 ℃.On the other hand, for guaranteeing the stability of automobile automobile when running at high speed, must reduce the wheel footpath of automobile, to reduce centre of gravity of vehicle, brake percentage is dwindled, the also corresponding minimizing of thermal capacity.Therefore, the thermal capacity to automobile brake sheet requires increasingly high.
The automobile brake sheet that uses in the market mainly is the semimetal resin-matrix friction material.The advantage of semimetal resin base brake block be manufacturing technology ripe, can be adjusted to distribution and recently select required friction factor, in light weight, cost is low.But when automobile continuously or during emergency braking, the temperature of brake block and brake disc friction surface raises rapidly, part " flash-point " temperature can reach 1000 ℃; Because the resin-matrix friction material heat resistance is poor; At high temperature can decompose and emit water, G&O etc., between two friction surfaces, form thin film, make dry friction become mixed friction or wet friction; Cause friction factor significantly to reduce (can up to 40%～50%), the hidden danger that exists brake to lose efficacy.In addition,, reduced its cementation when high temperature, caused the aggravation of resin-matrix friction material high temperature wear, the working life of significantly having reduced brake block because charing takes place resin.Therefore, work out have suitable friction factor, thermostability is high, wear resistance is good, braking is steady and cost is low braking material is current automobile brake sheet research worker's the task of top priority.
Charcoal fiber reinforced ceramic-base (is C/C-SiC specific to the present invention) friction material is a kind of high-performance brake material that the twentieth century end grows up; Because it is high and stable to have friction factor; Wear resistance, running-in ability and thermal conductivity are good; Pollution of ecological environment is few, and a series of excellent properties such as applied load height are especially strong at environmental suitability; The frictional behaviour decay is few under rainwater, oil, soda acid and adverse weather condition such as freeze, so C/C-SiC is acknowledged as the braking material of new generation that 21st century has competitive ability.
" a kind of industrial break is with the production method of the moving liner of charcoal/pottery " patent of invention that the applicant applies in earlier stage (patent No.: ZL200910042780.5) mainly to being precast body with the whole felt of needle-punched carbon fiber, adopt chemical vapor infiltration and molten silicon infiltration process industry break with the production method application of the moving liner of charcoal/pottery patent protection.
" preparation method of carbon fiber reinforced carbon-silicon carbide double matrix friction material " patent of invention that the applicant applies in earlier stage (application number: 200910042779.2) mainly to being raw material with short carbon fiber, plumbago, industrial silica fume and Bond, adopt temperature and pressure-charing-molten silicon Infiltration Technics preparation carbon fiber reinforced carbon-silicon carbide double matrix friction material preparation method's application patent protection.
Summary of the invention
The friction factor of automobile brake sheet that technical problem to be solved by this invention provides a kind of manufacturing is high and stable, the low production method with the good charcoal fiber reinforced ceramic-base automobile brake sheet of heat fade performance of wearing and tearing.
In order to solve the problems of the technologies described above; The production method of charcoal fiber reinforced ceramic-base automobile brake sheet provided by the invention; At first adopt the method for acupuncture to prepare charcoal fiber the whole network tire; Carry out adopting after the high-temperature heat treatment isothermal chemical vapor infiltration to make low density C/C composite material to it, low density C/C composite material is carried out in vacuum high temperature furnace, carrying out directed infiltration after the machining make the C/C-SiC brake lining, at last C/C-SiC brake lining and steel backing are riveted; Make required brake system of car and use the C/C-SiC brake block, comprise the following steps:
(1), needle-punched carbon fiber the whole network tire:
At first choose the long charcoal fiber of 10mm～80mm by proportioning and process the tire net, adopting the method for relay-type acupuncture to process density then is 0.10～0.30g/c m
3Between the whole network tire;
(2), high-temperature heat treatment:
The charcoal fiber preform that makes is carried out 1500～2100 ℃ high-temperature heat treatment at high temperature furnace, alleviate the stress that the charcoal fiber preform produces in the braiding process, and remove the glue on charcoal fiber tuft surface;
(3), isothermal chemical vapor infiltration:
Adopt the isothermal chemical vapor infiltration to carrying out the pyrolytic carbon density through the charcoal fiber preform after the high-temperature heat treatment, making density is 1.0～1.6g/cm
3Low density C/C composite material;
(4), machining:
Low density C/C composite material is carried out machining by corresponding braking automobile chip size;
(5), infiltration agent proportioning:
Calculate the SiC content that needs generation in the fusion siliconising process by the expection density of C/C-SiC brake block and the difference of low density C/C composite body density, and then calculate the theoretical silicon amount that needs in silicon and the carbon reaction; Get theoretical 1.1～2.0 times of silica flours that need the silicon amount of low density C/C composite body, and add iron powder, the amount of iron powder is 5～25% of a silica flour mass content, and silica flour and iron powder are mixed into the infiltration agent;
(6), directed infiltration reaction:
The infiltration agent is placed in the black-fead crucible paves, be tiled on the powder low density C/C composite body and light the pressure; Black-fead crucible is stacked and placed on carries out directed infiltration in the vacuum high temperature furnace to make density be 1.8～2.4g/cm
3The C/C-SiC brake lining; In the directed infiltration process, infiltration agent internal void along low density C/C composite body under the driving of capillary force infiltrates material internal, and silicon and pyrolytic carbon and iron react respectively and generated SiC and ferro-silicon compound, obtain the C/C-SiC brake lining;
(7), connect steel backing:
After the C/C-SiC brake lining that makes carried out surface Machining, carry out cold riveting with steel backing and make the C/C-SiC automobile brake sheet.
Heat treatment temperature is 1500～2100 ℃ in the step (2), and omnidistance 5～20 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly.
The carbon-source gas of isothermal chemical vapor infiltration is methane, third rare, propane or rock gas in the step (3); Diluent gas is nitrogen, hydrogen or its mixed gas; Carbon-source gas is 1: 1～3 with the ratio of diluent gas, and sedimentation time is 120～300 hours, and depositing temperature is 900～1100 ℃.
In the step (4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
Be that the silica flour of 0.01～0.1mm is the silicon source with purity 99.3%, granularity in the step (6), purity 99.0%, granularity are that the reducing iron powder of 0.01～0.15mm is a source of iron.The temperature of fusion siliconising is 1500～1900 ℃, is incubated 0.5～2.0h at maximum temperature point.
Can adopt the production method of the charcoal fiber reinforced ceramic-base automobile brake sheet of technique scheme, the advantage of invention and good effect:
The present invention is applied to automobile brake sheet with the C/C-SiC friction material at home and abroad first, and a kind of manufacturing technology of producing this liner in batches is provided.
Adopt the C/C-SiC automobile brake sheet and the production method thereof of technique scheme; With respect to semimetal resin base automobile brake sheet; The C/C-SiC automobile brake sheet all increases significantly at velocity coherence, Braking efficiency, noise control, the aspects such as grey control, working life and resistance to high temperature that fall; Especially insensitive to ambient environmental conditions, and manufacture cost remains basically stable, and is the higher novel automobile brake material of a kind of cost performance.
In sum, the present invention is that a kind of friction factor of automobile brake sheet of manufacturing is high and stable, the low production method with the good charcoal fiber reinforced ceramic-base automobile brake sheet of heat fade performance of wearing and tearing, preparation method's simple possible of this automobile brake sheet.
Description of drawings
Fig. 1 is the photo of the product of preparation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Embodiment 1:
(1) at first choose the long charcoal fiber of 10mm～80mm, become fluffy single shape fiber through the shredding of shredding equipment by proportioning, then the good charcoal fiber of shredding through air lay, utilize the lapping machine to be paved into fleece again, be prefabricated into individual layer net tire; Then with individual layer tire stratum reticulare range upon range of adding, to process density be 0.20g/cm to the method that adopts relay-type acupuncture introduce a charcoal fiber tuft perpendicular to shop layer direction
3The whole network tire;
(2) under argon shield atmosphere, precast body is carried out 1600 high-temperature heat treatment, the omnidistance 5 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly;
(3) adopt third rare be carbon source gas, hydrogen is diluent gas, third rare and volume ratio hydrogen is 1: 2, at 1100 deposit pyrolytic carbon matrixes, depositing and making density after 250 hours is 1.38g/cm to employing isothermal chemical vapor infiltration to precast body
3Low density charcoal fiber reinforcement carbon matrix C/C composite material;
(4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
(5) get the theoretical 1.4 times of silica flours of silicon amount and the iron powder of 15% silica flour content of needing of low density C/C composite material and be mixed into the infiltration agent;
(6) place black-fead crucible to pave the infiltration agent, be tiled on the powder low density C/C composite body and light the pressure, low density C/C composite material is carried out directed infiltration, making density is 1.92g/cm
3The C/C-SiC brake lining.Silica flour purity is 99.3%, granularity is 40 μ m.Iron powder purity is 99.0%, granularity is 80 μ m, is micro positive pressure during the fusion siliconising, and infiltration temperature is 1700, is incubated 1 hour;
(7) on grinding machine, adopt diamond wheel that rubbing surface is carried out surface Machining the C/C-SiC brake lining that makes, make C/C-SiC brake lining thickness reach the thickness of product requirement; Adopt copper then or the steel rivet is riveted C/C-SiC brake lining and steel backing, as shown in Figure 1.
The C/C-SiC automobile brake sheet for preparing on JF122 method of brake dynamometer with electric experimental machine, is carried out 1: 1 platform experiment according to Japanese car industrial standard JASO-C406 passenger vehicle-braking device-inertia bench experimental technique.Mating plate is the hollow brake disc of Φ 300mm, and material is gray cast iron trade mark HT250 among the GB/T9439, and the braking of constant force square, rotary inertia I=27.3Kgm are adopted in experiment
2, specified highest speed v
Max=140km/h.The stand test report is as shown in table 1.
Table 1
Embodiment 2:
(1) at first choose the long charcoal fiber of 10mm～80mm, become fluffy single shape fiber through the shredding of shredding equipment by proportioning, then the good charcoal fiber of shredding through carding, utilize the lapping machine to be paved into fleece again, be prefabricated into individual layer net tire; Then with individual layer tire stratum reticulare range upon range of adding, to process density be 0.18g/cm to the method that adopts relay-type acupuncture introduce a charcoal fiber tuft perpendicular to shop layer direction
3The whole network tire;
(2) the charcoal fiber preform is carried out 1800 ℃ high-temperature heat treatment, the omnidistance 8 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly;
(3) adopting rock gas is carbon source gas, and hydrogen is diluent gas, and the volume ratio of rock gas and hydrogen is 1: 3, adopts chemical vapor infiltration at 1000 ℃ of deposit pyrolytic carbons, and depositing and making density after 200 hours is 1.32g/cm
3Low density C/C composite material;
(4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
The theory of (5) getting low density C/C composite material needs the 1.8 times of silica flours of silicon amount and the iron powder of 25% silica flour content to be mixed into the infiltration agent;
(6) place black-fead crucible to pave the infiltration agent, be tiled on the powder low density C/C composite body and light the pressure, low density charcoal fiber reinforcement carbon matrix C/C composite material is carried out directed infiltration, making density is 2.12g/cm
3The C/C-SiC brake lining.Silica flour purity is 99.3%, granularity is 40 μ m.Iron powder purity is 99.0%, granularity is 80 μ m, is micro positive pressure during the fusion siliconising, and infiltration temperature is 1800 ℃, is incubated 2 hours;
(7) on grinding machine, adopt diamond wheel that rubbing surface is carried out surface Machining the C/C-SiC brake lining that makes, make C/C-SiC brake lining thickness reach the thickness of product requirement; Adopt copper then or the steel rivet is riveted C/C-SiC brake lining and steel backing.
With Rigaku-3014 type X-ray diffractometer sample is carried out material phase analysis, the mass percentage content that records C, SiC and FeSi and FeSi2 is respectively 34.6%, 48.6%, 4.2% and 12.6%.
On MM-1000 type friction wear testing machine, carry out the simulating brake test, mating plate is the 30CrMoSiVA alloyed steel.C/C-SiC friction test ring size: external diameter is 75mm, and internal diameter is 53mm, and thickness is 15mm.Break-in to 80% back, friction test ring surface is measured 20 times before the test, and end product is averaged.Test parameter is: brake pressurize 0.50～0.55Mpa, rotator inertia 0.25kgm
2Measure on the test ring 5 dimensional changes before and after locating to rub with the micrometer caliper that is accurate to 0.01mm, averaging obtains the linear abrasion rate.Friction factor, average power, braking energy etc. are by the direct record of testing machine.Test result is as shown in table 2.
Table 2
Embodiment 3:
(1) at first choose the long charcoal fiber of 10mm～80mm, become fluffy single shape fiber through the shredding of shredding equipment by proportioning, then the good charcoal fiber of shredding through air lay and carding, utilize the lapping machine to be paved into fleece again, be prefabricated into individual layer net tire; Then with individual layer tire stratum reticulare range upon range of adding, to process density be 0.22g/cm to the method that adopts relay-type acupuncture introduce a charcoal fiber tuft perpendicular to shop layer direction
3The whole network tire;
(2) under argon shield atmosphere, precast body is carried out 2000 high-temperature heat treatment, the omnidistance 15 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly;
(3) adopt third rare be carbon source gas, hydrogen is diluent gas, third rare and volume ratio hydrogen is 1: 2, at 1000 deposit pyrolytic carbon matrixes, depositing and making density after 300 hours is 1.42g/cm to employing isothermal chemical vapor infiltration to precast body
3Low density C/C composite material;
(4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
The theory of (5) getting low density C/C composite material needs the 2.0 times of silica flours of silicon amount and the iron powder of 20% silica flour content to be mixed into the infiltration agent;
(6) place black-fead crucible to pave the infiltration agent, be tiled on the powder low density C/C composite body and light the pressure, low density C/C composite material is carried out directed infiltration, making density is 2.04g/cm
3The C/C-SiC brake lining.Silica flour purity is 99.3%, granularity is 40 μ m.Iron powder purity is 99.0%, granularity is 80 μ m, is micro positive pressure during the fusion siliconising, and infiltration temperature is 1800 ℃, is incubated 2 hours;
(7) on grinding machine, adopt diamond wheel that rubbing surface is carried out surface Machining the C/C-SiC brake lining that makes, make C/C-SiC brake lining thickness reach the thickness of product requirement; Adopt copper then or the steel rivet is riveted C/C-SiC brake lining and steel backing.
In C/C-SiC material preparation process with furnace zone mechanics property analysis sample.Analysis result show the C/C-SiC material perpendicular to the mechanical property of the shop layer direction (promptly perpendicular to rubbing surface) of no latitude cloth shown in subordinate list 3.
Table 3
| Density | Percent opening | Flexural strength | Compression strength | Tensile strength | Shear strength | Impact toughness |
| 2.04g/cm 3 | 10.2％ | 124.2MPa | 208.8MPa | 136.4MPa | 19.4MPa | 4.3KJ·m 2 |
Embodiment 4:
(1) at first choose the long charcoal fiber of 10mm～80mm, become fluffy single shape fiber through the shredding of shredding equipment by proportioning, then the good charcoal fiber of shredding through air lay, utilize the lapping machine to be paved into fleece again, be prefabricated into individual layer net tire; Then with individual layer tire stratum reticulare range upon range of adding, to process density be 0.14g/cm to the method that adopts relay-type acupuncture introduce a charcoal fiber tuft perpendicular to shop layer direction
3The whole network tire;
(2) under argon shield atmosphere, precast body is carried out 1500 ℃ of high-temperature heat treatment, the omnidistance 6 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly;
(3) adopting methane is carbon source gas, and nitrogen is diluent gas, and the volume ratio of methane and nitrogen is 1: 2, and at 1100 ℃ of deposit pyrolytic carbon matrixes, depositing and making density after 180 hours is 1.0g/cm to employing isothermal chemical vapor infiltration to precast body
3Low density C/C composite material;
(4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 2mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
(5) get the theoretical 1.1 times of silica flours of silicon amount and the iron powder of 10% silica flour content of needing of low density C/C composite material and be mixed into the infiltration agent;
(6) place black-fead crucible to pave the infiltration agent, be tiled on the powder low density C/C composite body and light the pressure, low density C/C composite material is carried out directed infiltration, making density is 1.8g/cm
3The C/C-SiC brake lining.Silica flour purity is 99.3%, granularity is 40 μ m.Iron powder purity is 99.0%, granularity is 80 μ m, is micro positive pressure during the fusion siliconising, and infiltration temperature is 1500 ℃, is incubated 0.5 hour;
(7) on grinding machine, adopt diamond wheel that rubbing surface is carried out surface Machining the C/C-SiC brake lining that makes, make C/C-SiC brake lining thickness reach the thickness of product requirement; Adopt copper then or the steel rivet is riveted C/C-SiC brake lining and steel backing.
Embodiment 5:
(1) at first choose the long charcoal fiber of 10mm～80mm, become fluffy single shape fiber through the shredding of shredding equipment by proportioning, then the good charcoal fiber of shredding through carding, utilize the lapping machine to be paved into fleece again, be prefabricated into individual layer net tire; Then with individual layer tire stratum reticulare range upon range of adding, to process density be 0.30g/cm to the method that adopts relay-type acupuncture introduce a charcoal fiber tuft perpendicular to shop layer direction
3The whole network tire;
(2) the charcoal fiber preform is carried out 2100 ℃ high-temperature heat treatment, the omnidistance 20 hours time, pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly;
(3) adopting propane is carbon source gas, and the mixed gas of nitrogen and hydrogen is a diluent gas, and the volume ratio of the mixed gas of propane and nitrogen and hydrogen is 1: 1, adopts chemical vapor infiltration at 900 ℃ of deposit pyrolytic carbons, and depositing and making density after 200 hours is 1.36g/cm
3Low density charcoal fiber reinforcement carbon matrix C/C composite material;
(4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body;
The theory of (5) getting low density C/C composite material needs the 1.5 times of silica flours of silicon amount and the iron powder of 5% silica flour content to be mixed into the infiltration agent;
(6) place black-fead crucible to pave the infiltration agent, be tiled on the powder low density C/C composite body and light the pressure, low density C/C composite material is carried out directed infiltration, making density is 2.4g/cm
3The C/C-SiC brake lining.Silica flour purity is 99.3%, granularity is 40 μ m.Iron powder purity is 99.0%, granularity is 80 μ m, is micro positive pressure during the fusion siliconising, and infiltration temperature is 1900 ℃, is incubated 1 hour;
(7) on grinding machine, adopt diamond wheel that rubbing surface is carried out surface Machining the C/C-SiC brake lining that makes, make C/C-SiC brake lining thickness reach the thickness of product requirement; Adopt copper then or the steel rivet is riveted C/C-SiC brake lining and steel backing.
Claims (5)
1. the production method of a charcoal fiber reinforced ceramic-base automobile brake sheet; At first adopt the method for acupuncture to prepare charcoal fiber the whole network tire; It is carried out adopting the isothermal chemical vapor infiltration to make low density charcoal fiber reinforcement carbon matrix (C/C) composite material after the high-temperature heat treatment; Low density C/C composite material is carried out in vacuum high temperature furnace, carrying out directed infiltration after the machining make the C/C-SiC brake lining; At last C/C-SiC brake lining and steel backing are riveted, make required brake system of car and use the C/C-SiC brake block, it is characterized in that: comprise the following steps:
(1), needle-punched carbon fiber the whole network tire:
At first choose the long charcoal fiber of 10mm～80mm by proportioning and process the tire net, adopting the method for relay-type acupuncture to process density then is 0.10～0.30g/cm
3Between the whole network tire;
(2), high-temperature heat treatment:
The charcoal fiber preform that makes is carried out 1500～2100 ℃ high-temperature heat treatment at high temperature furnace, alleviate the stress that the charcoal fiber preform produces in the braiding process, and remove the glue on charcoal fiber tuft surface;
(3), isothermal chemical vapor infiltration:
Adopt the isothermal chemical vapor infiltration to carrying out the pyrolytic carbon density through the charcoal fiber preform after the high-temperature heat treatment, making density is 1.0～1.6g/cm
3Low density C/C composite material;
(4), machining
Low density C/C composite material is carried out machining by corresponding braking automobile chip size;
(5), infiltration agent proportioning:
Get theoretical 1.1～2.0 times of silica flours that need the silicon amount of low density C/C composite body, and add iron powder, the amount of iron powder is 5～25% of a silica flour mass content, and silica flour and iron powder are mixed into the infiltration agent;
(6), directed infiltration reaction:
The infiltration agent is placed in the black-fead crucible paves, be tiled on the powder low density C/C composite body and light the pressure; Black-fead crucible is stacked and placed on carries out directed infiltration in the vacuum high temperature furnace to make density be 1.8～2.4g/cm
3The C/C-SiC brake lining; In the directed infiltration process, infiltration agent internal void along low density C/C composite body under the driving of capillary force infiltrates material internal, and silicon and pyrolytic carbon and iron react respectively and generated SiC and ferro-silicon compound, obtain the C/C-SiC brake lining;
(7), connect steel backing:
After the C/C-SiC brake lining that makes carried out surface Machining, carry out cold riveting with steel backing and make the C/C-SiC automobile brake sheet.
2. the production method of charcoal fiber reinforced ceramic-base automobile brake sheet according to claim 1; It is characterized in that: heat treatment temperature is 1500～2100 ℃ in the described step (2); Omnidistance 5～20 hours time; Pressure is that micro positive pressure promptly surpasses pressure vacuum gauge 0 scale, argon gas inert gas shielding slightly.
3. the production method of charcoal fiber reinforced ceramic-base automobile brake sheet according to claim 1 and 2; It is characterized in that: the carbon-source gas of isothermal chemical vapor infiltration is methane, third rare, propane or rock gas in the described step (3); Diluent gas is nitrogen, hydrogen or its mixed gas; Carbon-source gas is 1: 1～3 with the ratio of diluent gas, and sedimentation time is 120～300 hours, and depositing temperature is 900～1100.
4. the production method of charcoal fiber reinforced ceramic-base automobile brake sheet according to claim 1 and 2; It is characterized in that: in the described step (4) the low density C/C composite material that makes is carried out machining by corresponding liner size; Size around the low density C/C composite material is pressed the negative common difference processing of liner size; Reserve the following process surplus of 1～2mm at thickness direction, obtain low density C/C composite body; And the counterbore that processing is connected with the steel backing rivet on low density C/C composite body.
5. the production method of charcoal fiber reinforced ceramic-base automobile brake sheet according to claim 1 and 2; It is characterized in that: be that the silica flour of 0.01～0.1mm is the silicon source with purity 99.3%, granularity in the described step (6), purity 99.0%, granularity are that the reducing iron powder of 0.01～0.15mm is a source of iron.The temperature of fusion siliconising is 1500～1900, is incubated 0.5～2.0h at maximum temperature point.
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| CN105565839A (en) * | 2015-12-25 | 2016-05-11 | 深圳市勒马制动科技有限公司 | Carbon-ceramic brake material preparation method and carbon-ceramic brake disc preparation method |
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| CN107445639A (en) * | 2016-10-12 | 2017-12-08 | 平顺县西沟龙鼎新材料科技有限公司 | A kind of preparation method of carbon/carbon porous body |
| CN108178633A (en) * | 2018-01-24 | 2018-06-19 | 湖南屹林材料技术有限公司 | A kind of middle low speed magnetic suspension train skid body material and preparation method thereof |
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| CN107010985B (en) * | 2017-04-20 | 2019-12-27 | 湖南中南智造新材料协同创新有限公司 | Ti3SiC2 phase-containing carbon fiber reinforced ceramic matrix friction material and preparation method thereof |
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| CN113816756A (en) * | 2021-10-20 | 2021-12-21 | 贵州省紫安新材料科技有限公司 | Preparation method of high-bonding-strength coating carbon/ceramic brake disc |
| CN116082053A (en) * | 2023-02-24 | 2023-05-09 | 中南大学 | Rapid preparation method of ceramic modified carbon/carbon composite material |
| CN116082053B (en) * | 2023-02-24 | 2024-05-03 | 中南大学 | Rapid preparation method of ceramic modified carbon/carbon composite material |
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