CN102634320B - Material of high-wear-resistance ceramic automobile brake block and preparation method thereof - Google Patents
Material of high-wear-resistance ceramic automobile brake block and preparation method thereof Download PDFInfo
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- CN102634320B CN102634320B CN201210106409.2A CN201210106409A CN102634320B CN 102634320 B CN102634320 B CN 102634320B CN 201210106409 A CN201210106409 A CN 201210106409A CN 102634320 B CN102634320 B CN 102634320B
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Abstract
The invention discloses a material of a high-wear-resistance ceramic automobile brake block, and preparation and molding methods of the material. The material of the high-wear-resistance ceramic automobile brake block comprises the following components in percentage by weight: 7-10% of cryolite, 1.5-2% of ferric sulfide, 1-3% of iron oxide red, 2.5-4% of iron oxide black, 9-12% of barite, 16-18% of binding agent, and the balance of high-titanium bauxite homogenized material composed of bauxite and titanium dioxide. According to the material disclosed by the invention, a multi-component friction modifying agent and a filler are added, the adding amount of each component is optimized and the grain diameter of powder is optimized, so as to adjust friction and abrasion behaviors; and a resin bonding agent is used for compounding a plurality of the functional components with a steel back to sufficiently express the synergistic effect of each component. The high-wear-resistance ceramic automobile brake block prepared by the material and the method disclosed by the invention is an environment-friendly friction material and has the advantages of low noise, high friction coefficient, small heat fading, long service life, small damages to mating plates and the like.
Description
Technical field
The present invention relates to a kind of material of high abrasion ceramic automobile brake block, also related to the preparation method of this material.
Background technology
Brake facing is the vital part of brake system of car, and the over-all properties of brake facing is directly connected to stability and the reliability of breaking system.Brake pad material is mainly divided into by formula difference: asbestos type, semipermanent mold and without three kinds of asbestos organic composite types (NAO type).Asbestos base brake facing can progressively lose crystal water and occur obviously " heat fading " phenomenon more than 400 DEG C, causes that frictional property is unstable, working layer rotten, wear rate increases and shorten work-ing life.Meanwhile, asbestos base brake facing does not meet environmental requirement, and GB12676-1999 standard has banned use of asbestos.Semimetal friction material has the advantages such as frictional coefficient is high, thermal conductivity good, machine-shaping is easy, but has following problem: density is large, and steel fiber easily gets rusty, and easily adhere and damage mating plate, and after corrosion, product strength reduction, wearing and tearing strengthens after corrosion; Higher hardness can be damaged mating material, produces chatter and brake noise.Under low temperature and high temperature, can keep good braking effect without asbestos organic composite type brake facing, aspect abrasion resistance and reduction noise, there is greater advantage.Along with the fast development of Hyundai Motor and the raising of environmental consciousness, the material to brake pad material and manufacturing process have all proposed more and more higher requirement.Ceramic brake is made up of ceramic phase, nonferrous packing material, tackiness agent and a small amount of metallic constituent element, there is stable friction performance, wear rate is low, proportion is little, hardness is large, chemical stability is good, corrosion-resistant, noiselessness, without the ash that falls, do not corrode the series of advantages such as wheel hub, long service life and environmental protection, be an important directions of high-performance automobile braking piece research.High abrasion ceramic automobile brake block has wide market outlook in China, but because its manufacturing cost is high, is mainly used at present on medium-to-high grade car, and dependence on import.
Summary of the invention
The technical problem to be solved in the present invention is: compared with the not high problem of the unstable and heat resistanceheat resistant of low and high temperature frictional behaviour decline performance, provide a kind of high abrasion ceramic automobile brake block material taking inexpensive bauxitic clay as main raw material and preparation method thereof for existing automobile brake sheet wear resisting property.
Technical scheme of the present invention:
Material prescription: a kind of high abrasion ceramic automobile brake block material, according to quality percentage meter, the content of each component is: sodium aluminum fluoride: 7 ~ 10%, iron sulphide: 1.5 ~ 2%, iron oxide red: 1 ~ 3%, iron oxide black: 2.5 ~ 4%, barite: 9 ~ 12%, tackiness agent: 16 ~ 18%, surplus is the high titanium bauxitic clay homogeneous material being made up of bauxitic clay and titanium dioxide.
Tackiness agent comprises two kinds of liquid resin and powdered resins: liquid resin is one or more in liquid phenolic resin, furane resin, polybutadiene; Powdered resin is one or more in boron bakelite resin, cashew nut oil modified alkyd resin, cashew nut shell oil melamine modified phenolic resin.
Each component granularity is respectively: sodium aluminum fluoride :≤200 orders, iron sulphide :≤200 orders, iron oxide red :≤180 orders, iron oxide black :≤200 orders, barite :≤240 orders, high titanium bauxitic clay homogeneous material :≤50 orders.
Mixed powder after high titanium bauxitic clay homogeneous material is arranged in pairs or groups by 80 order < particle diameter≤50 orders, 200 order < particle diameter≤80 orders and three kinds of particulate material of particle diameter≤200 object, its 80 order < particle diameter≤50 object particulate material accounts for 25 ~ 45wt.%, 200 order < particle diameter≤80 object particulate material account for 35 ~ 55wt.%, and particle diameter≤200 object particulate material accounts for 10 ~ 30 wt.%.
Preparation method comprises the following steps:
Step 1, the high titanium bauxitic clay processing that homogenizes: first by bauxitic clay (Al
2o
3content is 58 ~ 60wt.%) and the mixed powder fragmentation of titanium dioxide make particle diameter≤400 object raw material powder, then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, obtain high titanium bauxitic clay homogeneous material.This homogeneous material is carried out to fragmentation and make its particle diameter≤50 order, screening, for subsequent use.
Step 2, batching: carry out weigh batching according to 1 and 4 pairs of each components of claim;
Step 3, mixes: the said components except tackiness agent is packed in planetary roller machine and is uniformly mixed, and mixing time is 30 ~ 90 minutes, obtains mixed powder; Then, in mixed powder, add tackiness agent and stir making mixing of materials even in 25 ~ 60 minutes, obtain premolding material;
Step 4, moulding: premolding material and steel backing are put into mould simultaneously and carry out punching press or shaped by fluid pressure, obtain required type shape by steel backing and be bonded in the brake facing preform that the friction materials on steel backing forms, pressing pressure is 200 ~ 400MPa;
Step 5, solidify: pack brake facing preform into tunnel furnace, in 60 ~ 300 DEG C solidify 30 ~ 50 hours, obtain brake facing blank;
Step 6, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
In step 1, the mass ratio of bauxitic clay and titanium dioxide is 4:1 ~ 6:1.Calcining process is: preheating zone temperature is 100 ~ 1200 DEG C, 5 ~ 8 hours; Burning zone temperature is 1250 ~ 1350 DEG C, is incubated 3 ~ 5 hours; Finally by cooling zone, naturally cool to normal temperature through behind l0 ~ 15 hour.
Beneficial effect of the present invention:
Bauxitic clay high rigidity is calcined in utilization and high-intensity characteristic is brought into play its room temperature and high temperature increases the effect rubbing; Titanium dioxide, as friction modified constituent element, plays the effect that increases toughness, strengthens anti-shear ability; Sodium aluminum fluoride is friction modifiers, and lubricate can improve job stability, resistance to marring, block resistance and the wear resistance of brake facing, reduces brake noise; Barite serves as filler, it at high temperature type become transfer film, can stablize frictional coefficient, reduce wearing and tearing.Iron sulphide decomposes under comparatively high temps and type becomes metal oxide, and wearing and tearing and stable frictional coefficient can fall in the transfer film that type becomes; Iron oxide red and iron black porous, can reduce brake noise and vibration, also has pigmentation.Boron modified phenolic resin plays bonding and transmitted load, has guaranteed necessary physical strength.
The high abrasion ceramic automobile brake block that uses the present invention to make is a kind of without asbestos type environment-friendly materials, and its proportion is low, wear resisting property is excellent, stable friction factor, heat fading is little, reliability is high, braking is steady, noise is little and the life-span is long.In addition, preparation technology is easy, cost is low, be applicable to suitability for industrialized production.
brief description of the drawings:
Fig. 1 is process flow sheet of the present invention.
embodiment:
embodiment 1: contain the preparation of the high abrasion ceramic automobile brake block of the high titanium bauxitic clay of 52wt.% homogeneous material.
The mass percent of each component and granularity: 9.5% sodium aluminum fluoride (Na
3alF
6,≤200 orders), 1.5% iron sulphide (FeS
2,≤200 orders), 3% iron oxide red (Fe
2o
3,≤180 orders), 4% iron oxide black (Fe
3o
4,≤200 orders), 12% barite (BaSO
4,≤240 orders), 18% tackiness agent, 52% high titanium bauxitic clay homogeneous material mixed powder (≤50 order).
In high titanium bauxitic clay homogeneous material mixed powder, the mass ratio of bauxitic clay and titanium dioxide is 4:1, wherein coarse particles material (80 order < particle diameter≤50 order) accounts for 35wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 45wt.%, and fine particle material (particle diameter≤200 order) accounts for 20wt.%.
Preparation and moulding are according to following steps:
Step 1, the bauxitic clay processing that homogenizes: by bauxitic clay (Al
2o
3content is 58 ~ 60wt.%) and the mixed powder fragmentation of titanium dioxide make particle diameter≤400 object raw material powder, wherein the mass ratio of bauxitic clay and titanium dioxide is 4:1.Then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, calcining process is: preheating zone temperature is 100 ~ 1200 DEG C, by the time be 5 hours; Burning zone temperature is 1250 DEG C, is incubated 3 hours; In cooling zone, after l0 hour, naturally cool to normal temperature, obtain bauxitic clay homogeneous material.Bauxitic clay homogeneous material is carried out to fragmentation, make its particle diameter≤50 order, wherein coarse particles material (80 order < particle diameter≤50 order) accounts for 35wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 45wt.%, and fine particle material (particle diameter≤200 order) accounts for 20wt.%.。
Step 2, batching: weigh each component according to formula above, and be crushed to desired particle size.
Step 3, mixes: the each constituent element except tackiness agent is uniformly mixed in planetary roller machine, and mixing time is 30 minutes, obtains mixed powder.In mixed powder, add the liquid phenolic resin of 5wt.%, stir 20 minutes, then 13 wt.% boron bakelite resins are put into batch mixing pot and stir and make mixing of materials even in 25 minutes, obtain premolding material.
Step 4, moulding: then premolding material and steel backing are put into mould simultaneously and carried out punching press or shaped by fluid pressure, obtain brake facing preform, and pressing pressure is 200MPa.
Step 5, solidify: pack brake facing preform into tunnel furnace, in 270 DEG C solidify 36 hours, obtain brake facing blank.
Step 5, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
embodiment 2: contain the preparation of the high abrasion ceramic automobile brake block of 55wt.% bauxitic clay homogeneous material.
The mass percent of each component and granularity: 9.4% sodium aluminum fluoride (Na
3alF
6,≤200 orders), 2% iron sulphide (FeS
2,≤200 orders), 2.6% iron oxide red (Fe
2o
3,≤180 orders), 4% iron oxide black (Fe
3o
4,≤200 orders), 11% barite (BaSO
4,≤240 orders), 16% tackiness agent, 55% high titanium bauxitic clay homogeneous material mixed powder (≤50 order).In high titanium bauxitic clay homogeneous material mixed powder, the mass ratio of bauxitic clay and titanium dioxide is 4:1, coarse particles material (80 order < particle diameter≤50 order) accounts for 30wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 40wt.%, and fine particle material (particle diameter≤200 order) accounts for 30wt.%.
Prepare and moulding according to following steps:
Step 1, the bauxitic clay processing that homogenizes: by bauxitic clay (Al
2o
3content is 58 ~ 60wt.%) and the mixed powder fragmentation of titanium dioxide to make particle diameter be≤400 object raw material powders, wherein the mass ratio of bauxitic clay and titanium dioxide is 4:1.Then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, calcining process is: preheating zone temperature is 150
~1200 DEG C, by the time be 6 hours; Burning zone temperature is 1250 DEG C, is incubated 4 hours; In cooling zone, after l2 hour, naturally cool to normal temperature, obtain bauxitic clay homogeneous material.Bauxitic clay homogeneous material is carried out to fragmentation, make its particle diameter≤50 order, wherein coarse particles material (80 order < particle diameter≤50 order) accounts for 30wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 40wt.%, and fine particle material (particle diameter≤200 order) accounts for 30wt.%.
Step 2, batching: weigh each component according to the mass percent of above-mentioned each component, and be crushed to desired particle size.
Step 3, mixes: all components except tackiness agent is uniformly mixed in planetary roller machine, and mixing time is 30 minutes, obtains mixed powder.In mixed powder, add the liquid phenolic resin of 4wt.%, stir 10 minutes, then add the cashew nut oil modified alkyd resin of 12wt.% and stir and make mixing of materials even in 35 minutes, obtain premolding material.
Step 4, moulding: premolding powder and steel backing are put into mould simultaneously and carry out punching press or shaped by fluid pressure, obtain brake facing preform, pressing pressure is 300MPa.
Step 5, solidifies: then, pack brake facing preform into tunnel furnace, solidify 30 hours in 200 DEG C, obtain brake facing blank.
Step 6, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
embodiment 3: contain the preparation of the high abrasion ceramic automobile brake block of 58wt.% bauxitic clay homogeneous material.
The mass percent of each component and granularity: 7.5% sodium aluminum fluoride (Na
3alF
6,-200 orders), 1.8% iron sulphide (FeS
2,≤200 orders), 2.5% iron oxide red (Fe
2o
3,≤180 orders), 3.2% iron oxide black (Fe
3o
4,≤200 orders), 10% barite (BaSO
4,≤240 orders), 17% tackiness agent, 58% high titanium bauxitic clay homogeneous material mixed powder (≤50 order).In high titanium bauxitic clay homogeneous material mixed powder, the mass ratio of bauxitic clay and titanium dioxide is 5:1, coarse particles material (80 order < particle diameter≤50 order) accounts for 30wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 50wt.%, and fine particle material (particle diameter≤200 order) accounts for 20wt.%.
Prepare and moulding according to following steps:
Step 1, the bauxitic clay processing that homogenizes: by bauxitic clay (Al
2o
3content is 58 ~ 60wt.%) and the mixed powder fragmentation of titanium dioxide make particle diameter≤400 object raw material powder, wherein the mass ratio of bauxitic clay and titanium dioxide is 5:1.Then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, calcining process is: preheating zone temperature is 200 ~ 1200 DEG C, by the time be 8 hours; Burning zone temperature is 1350 DEG C, is incubated 5 hours; In cooling zone, after l5 hour, naturally cool to normal temperature, obtain high titanium bauxitic clay homogeneous material.This material is carried out to fragmentation, make its particle diameter≤50 order.Prepare ceramic brake mixed powder by following quality percentage composition: bauxitic clay homogeneous material mixed powder.In high titanium bauxitic clay homogeneous material mixed powder, coarse particles material (80 order < particle diameter≤50 order) accounts for 30wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 50wt.%, and fine particle material (particle diameter≤200 order) accounts for 20wt.%.
Step 2, batching: weigh each component according to the mass percent of above-mentioned each component, and and be crushed to desired particle size.
Step 3, mixes: all components except tackiness agent is uniformly mixed in planetary roller machine, and mixing time is 30 minutes, obtains mixed powder.In mixed powder, add the polybutadiene of 5wt.%, stir 20 minutes, then by 12wt.% cashew nut shell oil melamine modified phenolic resin and stir and make mixing of materials even in 30 minutes, obtain premolding material.
Step 4, moulding: premolding material and steel backing are put into mould simultaneously and carry out punching press or shaped by fluid pressure, obtain brake facing preform, pressing pressure is 400MPa.
Step 5, solidify: pack brake facing preform into tunnel furnace, in 300 DEG C solidify 25 hours, obtain brake facing blank.
Step 6, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
embodiment 4: contain the preparation of the high abrasion ceramic automobile brake block of 61wt.% bauxitic clay homogeneous material.
The mass percent of each component and granularity: 8% sodium aluminum fluoride (Na
3alF
6,≤200 orders), 1.5% iron sulphide (FeS
2,≤200 orders), 1.5% iron oxide red (Fe
2o
3,≤180 orders), 2.5% iron oxide black (Fe
3o
4,≤200 orders), 9.5% barite (BaSO
4,≤240 orders), 16% tackiness agent, 61% high titanium bauxitic clay homogeneous material mixed powder (≤50 order).In high titanium bauxitic clay homogeneous material mixed powder, the mass ratio of bauxitic clay and titanium dioxide is 6:1, coarse particles material (80 order < particle diameter≤50 order) accounts for 45wt.%, medium grain material (200 order < particle diameter≤80 order) accounts for 40wt.%, and fine particle material (particle diameter≤200 order) accounts for 15wt.%.
Prepare and moulding according to following steps:
Step 1, the bauxitic clay processing that homogenizes: by bauxitic clay (Al
2o
3content is 58 ~ 60wt.%) and the mixed powder fragmentation of titanium dioxide make particle diameter≤400 object raw material powder, wherein the mass ratio of bauxitic clay and titanium dioxide is 6:1.Then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, calcining process is: preheating zone temperature is 180 ~ 1200 DEG C, by the time be 7 hours; Burning zone temperature is 1300 DEG C, is incubated 4 hours; In cooling zone, after l3 hour, naturally cool to normal temperature, obtain high titanium bauxitic clay homogeneous material.This homogeneous material is carried out to fragmentation, make its particle diameter≤50 order, wherein coarse particles material (80 order < particle diameter≤50 order) accounts for 45wt.%, and medium grain material (200 order < particle diameter≤80 order) accounts for 40wt.%, and fine particle material (particle diameter≤200 order) accounts for 15wt.%.
Step 2, batching: weigh each component according to the mass percent of above-mentioned each component, and and be crushed to desired particle size.
Step 3, mixes: all components except tackiness agent is uniformly mixed in planetary roller machine, and mixing time is 30 minutes, obtains mixed powder.The furane resin that add 4.5wt.% in mixed powder stir, then by 11.5wt.% boron bakelite resin and stir and make mixing of materials even in 45 minutes, obtain premolding powder.
Step 4, moulding: premolding powder and steel backing are put into mould simultaneously and carry out punching press or shaped by fluid pressure, obtain brake facing preform, pressing pressure is 300Mpa.
Step 5, solidify: pack brake facing preform into tunnel furnace, in 250 DEG C solidify 40 hours, obtain brake facing blank.
Step 6, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
Claims (2)
1. a high abrasion ceramic automobile brake block material, it is characterized in that: according to quality percentage meter, the content of each component is: sodium aluminum fluoride: 7 ~ 10%, iron sulphide: 1.5 ~ 2%, iron oxide red: 1 ~ 3%, iron oxide black: 2.5 ~ 4%, barite: 9 ~ 12%, tackiness agent: 16 ~ 18%, surplus is the high titanium bauxitic clay homogeneous material being made up of bauxitic clay and titanium dioxide, tackiness agent comprises two kinds of liquid resin and powdered resins: liquid resin is one or more in liquid phenolic resin, furane resin, polybutadiene, powdered resin is one or more in boron bakelite resin, cashew nut oil modified alkyd resin, cashew nut shell oil melamine modified phenolic resin, each component granularity is respectively: sodium aluminum fluoride :≤200 orders, iron sulphide :≤200 orders, iron oxide red :≤180 orders, iron black :≤200 orders, barite :≤240 orders, high titanium bauxitic clay homogeneous material :≤50 orders, high titanium bauxitic clay homogeneous material is by 80 order < particle diameter≤50 orders, mixed powder after three kinds of particulate material collocation of 200 order < particle diameter≤80 orders and particle diameter≤200 object, wherein 80 order < particle diameter≤50 object particulate material account for 25 ~ 45%, 200 order ﹤ particle diameter≤80 object particulate material account for 35 ~ 55%, particle diameter≤200 object particulate material accounts for 10 ~ 30 %.
2. a preparation method for high abrasion ceramic automobile brake block material as claimed in claim 1, is characterized in that:
Step 1, the high titanium bauxitic clay processing that homogenizes: first the mixed powder fragmentation of bauxitic clay and titanium dioxide is made to particle diameter≤400 object raw material powder, then raw material powder is pressed into and puts into tunnel furnace after green compact and calcine, obtain high titanium bauxitic clay homogeneous material, this homogeneous material is carried out to fragmentation and make its particle diameter≤50 order, screening, for subsequent use; The mass ratio of bauxitic clay and titanium dioxide is 4:1 ~ 6:1, and calcining process is: preheating zone temperature is 100 ~ 1200 DEG C, 5 ~ 8 hours; Burning zone temperature is 1250 ~ 1350 DEG C, is incubated 3 ~ 5 hours; Finally by cooling zone, naturally cool to normal temperature through behind l0 ~ 15 hour;
Step 2, batching;
Step 3, mixes: the said components except tackiness agent is packed in planetary roller machine and is uniformly mixed, and mixing time is 30 ~ 90 minutes, obtains mixed powder; Then, in mixed powder, add tackiness agent and stir making mixing of materials even in 25 ~ 60 minutes, obtain premolding material;
Step 4, moulding: premolding material and steel backing are put into mould simultaneously and carry out punching press or shaped by fluid pressure, obtain required type shape by steel backing and be bonded in the brake facing preform that the friction materials on steel backing forms, pressing pressure is 200 ~ 400MPa;
Step 5, solidify: pack brake facing preform into tunnel furnace, in 60 ~ 300 DEG C solidify 30 ~ 50 hours, obtain brake facing blank;
Step 6, integer: brake facing blank is refined to integer, obtain the high abrasion ceramic automobile brake block of desired size precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106409.2A CN102634320B (en) | 2012-04-12 | 2012-04-12 | Material of high-wear-resistance ceramic automobile brake block and preparation method thereof |
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|---|---|---|---|
| CN201210106409.2A CN102634320B (en) | 2012-04-12 | 2012-04-12 | Material of high-wear-resistance ceramic automobile brake block and preparation method thereof |
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| CN102634320B true CN102634320B (en) | 2014-07-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980536B (en) * | 2012-11-13 | 2015-10-14 | 上海交通大学 | Brake block steel back flatness detection system and method |
| CN104625980B (en) * | 2013-11-14 | 2018-06-05 | 江苏华东砂轮有限公司 | A kind of accurate mill roller abrasive wheel and preparation method thereof |
| CN105108662B (en) * | 2015-08-26 | 2017-10-31 | 贵州宏安制动器科技有限公司 | A kind of ceramic frication material phenolic resin modified method and potting ceramic friction material method |
| CN107573062B (en) * | 2017-08-28 | 2023-08-01 | 天宜上佳（天津）新材料有限公司 | Ceramic material with heat insulation performance, ceramic-aluminum alloy brake disc prepared from ceramic material and preparation method of ceramic material |
| JP7358843B2 (en) | 2019-08-23 | 2023-10-11 | 株式会社アドヴィックス | Friction materials and friction material compositions |
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| US6423669B1 (en) * | 1999-07-06 | 2002-07-23 | Sergei Nikolaevich Alexandrov | Composition for the treatment of friction pairs |
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| EP0469464A2 (en) * | 1990-08-02 | 1992-02-05 | Miba Frictec GmbH | Friction lining and process for manufacturing it |
| EP1081206A1 (en) * | 1999-02-19 | 2001-03-07 | Otsuka Kagaku Kabushiki Kaisha | Friction material |
| US6423669B1 (en) * | 1999-07-06 | 2002-07-23 | Sergei Nikolaevich Alexandrov | Composition for the treatment of friction pairs |
| CN101000078A (en) * | 2006-12-26 | 2007-07-18 | 太原市星羽科技有限公司 | Ceramic carbon fibre brake disc for automobile |
| CN101942232A (en) * | 2010-08-17 | 2011-01-12 | 南京钛威科技有限公司 | Method for modifying stuffing by carbon |
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