CN105418123A - Preparing method of synthetic-fat dispersion tungsten carbide and boron carbide-carbon fiber friction material - Google Patents
Preparing method of synthetic-fat dispersion tungsten carbide and boron carbide-carbon fiber friction material Download PDFInfo
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- CN105418123A CN105418123A CN201610014379.0A CN201610014379A CN105418123A CN 105418123 A CN105418123 A CN 105418123A CN 201610014379 A CN201610014379 A CN 201610014379A CN 105418123 A CN105418123 A CN 105418123A
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Abstract
The invention discloses a preparing method of a synthetic-fat dispersion tungsten carbide and boron carbide-carbon fiber friction material. The preparing method is characterized by including the steps that a graphitized carbon fiber blanket with the density of 0.1-1.8 g/cm<3> is subjected to boron carbide deposition after being subjected to carburization; synthetic-fat dispersion tungsten carbide filling is carried out, then embedding boronizing is carried out, nitridation is carried out in nitrogen atmosphere, and the synthetic-fat dispersion tungsten carbide and boron carbide-carbon fiber friction material is prepared. According to the preparing method, the friction material is prepared from the graphitized carbon fiber blanket through the steps of carburization, boron carbide deposition, tungsten carbide filling, embedding boronizing, nitridation and the like; the prepared friction material is high in strength, tenacity and friction performance, and is a friction material adapting to various climate conditions.
Description
Technical field
The present invention relates to the preparation method of the friction materials of a kind of carbon fiber and stupalith compound, belong to technical field of composite preparation.
Background technology
What friction materials mainly adopted at present is carbon fiber and carbon (C/C) matrix material, and because the wear resisting property of C/C matrix material is relatively low, people are seeking the preparation method of the higher friction materials of wear resisting property.In addition, in a humid environment, its frictional behaviour can reduce C/C matrix material, brings serious potential safety hazard to use.
Summary of the invention
The object of the present invention is to provide a kind of preparation method that can overcome above-mentioned defect, realize the friction materials prepared more high strength, higher frictional behaviour and adapt to various weather condition.Its technical scheme is:
The preparation method closing fat dispersion wolfram varbide norbide-carbon fiber friction material is 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket carries out the process of depositing silicon boron after carrying out carburizing treatment, carry out conjunction fat dispersion wolfram varbide again and fill process, carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment is obtained closes fat dispersion wolfram varbide norbide-carbon fiber friction material, and concrete steps are as follows again:
(1) be 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket passes into the mixed gas of propane flammable gas and nitrogen at 900 ~ 1100 DEG C of temperature, propane flammable gas: the mol ratio of nitrogen is 1:4 ~ 6, and flow control is at 50 ~ 600ml/min, and carburizing treatment obtains carburizing carbon fiber blanket for 10 ~ 24 hours;
(2) above-mentioned carburizing carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixed gas of boron trichloride, methane, hydrogen and argon gas, boron trichloride: methane: hydrogen: the mol ratio of argon gas is 1:1 ~ 2:3 ~ 6:4 ~ 6, flow control is at 50 ~ 600ml/min, and the process of depositing silicon boron obtains depositing silicon boron carbon fiber blanket for 10 ~ 24 hours;
(3) above-mentioned depositing silicon boron carbon fiber blanket being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5 ~ 20% wolfram varbides, be placed in ultrasonic cleaner and fill wolfram varbide process 30 ~ 50 minutes, obtained filling tungsten carbide carbon tapetum fibrosum after taking out drying, wherein closing fat slurry is contain the ethanolic soln closing fat 5 ~ 20%;
(4) above-mentioned filling tungsten carbide carbon tapetum fibrosum is imbedded in siliconising material, siliconising process 3 ~ 5 hours obtained siliconising carbon fiber blankets at the temperature of 1500 ~ 1800 DEG C in vacuum atmosphere, wherein, additional 5 ~ 15% concentration of mixture of siliconising material to be silica flour 30 ~ 50% and diameter be 0.5 ~ 3mm carbon granule 50 ~ 70% are obtain after the polyvinyl alcohol water solution Homogeneous phase mixing drying of 0.2 ~ 0.6%;
(5) above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained fat that closes at the temperature of 1350 ~ 1700 DEG C is disperseed wolfram varbide norbide-carbon fiber friction material.
Compared with prior art, its advantage is in the present invention:
1, the carbon fiber blanket that the present invention uses is graphited carbon fiber blanket, or graphited needled carbon tapetum fibrosum, or graphited weaving carbon fiber cloth, or graphited 3 D weaving carbon fiber knits block;
2, the friction materials that prepared by the present invention is by carbon fiber and norbide, wolfram varbide, a kind of high strength of silicon nitride compound, high frictional behaviour, the friction materials adapted under various weather condition;
3, by carburizing, depositing silicon boron, fill wolfram varbide, imbed the preparation that the step such as siliconising and nitrogenize realizes friction materials, carburizing and depositing silicon boron two steps are at the carbon coating of carbon fiber surface imparting and boron carbide coating in order to protect carbon fiber surface not to be damaged, because boron carbide coating can stop the infiltration of silicon steam in the process of siliconising, boron carbide coating is once seepage, carbide coatings and silicon steam reaction Formed SiClx stop silicon steam further, thus protection carbon fiber surface is not damaged;
4, carbon fiber blanket has very high void content, depend merely on carburizing and depositing silicon boron can need just can reach densification for a long time, manufacturing cost is very high, wolfram varbide is filled in employing will be very convenient with the space of the method filling carbon fiber blanket imbedding siliconising, time saving and energy saving, fill the wear resisting property that wolfram varbide can improve friction materials further simultaneously;
5, the present invention utilizes the effect of ultrasonic acoustic to produce microvesicle in the slurry, when acoustic pressure or the sound intensity acquire a certain degree, microvesicle will undergoes rapid expansion, then close suddenly again, the moment that microvesicle is closed produces shockwave, make the pressure producing about 1012pa around microvesicle, tungsten carbide particle is forced to be filled in the space of depositing silicon carbide carbon fiber blanket, reaches the object of calking;
6, conjunction fat slurry dispersion wolfram varbide is adopted to fill process, can effectively improve tungsten carbide particle suspension property, improve charging efficiency, tungsten carbide particle wraps up by the gac formed after closing fat high temperature carbonization, in siliconising process, form silicon carbide with silicon steam reaction, tungsten carbide particle combines by the silicon carbide of generation securely;
7, the Pure Silicon Metal fusing point lower owing to infiltrating is about 1420 DEG C, the temperature of friction materials working face is instantaneous reaches nearly 2000 DEG C, Pure Silicon Metal nitrogenize is generated silicon nitride, form the friction materials of microvoid structure, the tolerable temperature of friction materials working face can be increased substantially, improve the work-ing life of friction materials.
Embodiment
embodiment 1
(1) be 1.8g/cm by density
3graphited carbon fiber blanket passes into the mixed gas of propane flammable gas and nitrogen at 900 DEG C of temperature, propane flammable gas: nitrogen mol ratio be 1:4, flow control is at 50ml/min, and carburizing treatment 24 hours obtains carburizing carbon fiber blanket;
(2) above-mentioned carburizing carbon fiber blanket is passed at 900 DEG C of temperature the mixed gas of boron trichloride, methane, hydrogen and argon gas, boron trichloride: methane: hydrogen: the mol ratio of argon gas is 1:1:3:4, flow control is at 50ml/min, and the process of depositing silicon boron obtains depositing silicon boron carbon fiber blanket for 24 hours;
(3) above-mentioned depositing silicon boron carbon fiber blanket being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5% wolfram varbide, be placed in ultrasonic cleaner and fill wolfram varbide process 50 minutes, obtained filling tungsten carbide carbon tapetum fibrosum after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 5%;
(4) above-mentioned filling tungsten carbide carbon tapetum fibrosum is imbedded in siliconising material, siliconising 5 hours obtained siliconising carbon fiber blankets at the temperature of 1500 DEG C in vacuum atmosphere, wherein, siliconising material is silica flour 30% and diameter, and that to be additional 5% concentration of 0.5mm carbon granule 70% be is dry obtained after the polyvinyl alcohol water solution Homogeneous phase mixing of 0.2%;
(5) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 hours obtained wolfram varbide norbide-carbon fiber friction materials at the temperature of 1700 DEG C.
embodiment 2
(1) be 0.8g/cm by density
3graphited carbon fiber blanket passes into the mixed gas of propane flammable gas and nitrogen at 1000 DEG C of temperature, propane flammable gas: nitrogen mol ratio be 1:5, flow control is at 350ml/min, and carburizing treatment 18 hours obtains carburizing carbon fiber blanket;
(2) above-mentioned carburizing carbon fiber blanket is passed at 1000 DEG C of temperature the mixed gas of boron trichloride, methane, hydrogen and argon gas, boron trichloride: methane: hydrogen: the mol ratio of argon gas is 1:1.5:4.5:5, flow control is at 350ml/min, and the process of depositing silicon boron obtains depositing silicon boron carbon fiber blanket for 18 hours;
(3) above-mentioned depositing silicon boron carbon fiber blanket being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 12% wolfram varbide, be placed in ultrasonic cleaner and fill wolfram varbide process 40 minutes, obtained filling tungsten carbide carbon tapetum fibrosum after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 12%;
(4) above-mentioned filling tungsten carbide carbon tapetum fibrosum is imbedded in siliconising material, siliconising 4 hours obtained siliconising carbon fiber blankets at the temperature of 1650 DEG C in vacuum atmosphere, wherein, siliconising material is silica flour 40% and diameter, and that to be additional 10% concentration of 2mm carbon granule 60% be is dry obtained after the polyvinyl alcohol water solution Homogeneous phase mixing of 0.4%;
(5) by above-mentioned siliconising carbon fiber blanket nitriding treatment 18 hours obtained wolfram varbide norbide-carbon fiber friction materials at the temperature of 1550 DEG C.
embodiment 3
(1) be 0.1g/cm by density
3graphited carbon fiber blanket passes into the mixed gas of propane flammable gas and nitrogen at 1100 DEG C of temperature, propane flammable gas: nitrogen mol ratio be 1:6, flow control is at 600ml/min, and carburizing treatment 10 hours obtains carburizing carbon fiber blanket;
(2) above-mentioned carburizing carbon fiber blanket is passed at 1100 DEG C of temperature the mixed gas of boron trichloride, methane, hydrogen and argon gas, boron trichloride: methane: hydrogen: the mol ratio of argon gas is 1:2:6:6, flow control is at 600ml/min, and the process of depositing silicon boron obtains depositing silicon boron carbon fiber blanket for 10 hours;
(3) above-mentioned depositing silicon boron carbon fiber blanket being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 20% wolfram varbide, be placed in ultrasonic cleaner and fill wolfram varbide process 30 minutes, obtained filling tungsten carbide carbon tapetum fibrosum after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 20%;
(4) above-mentioned filling tungsten carbide carbon tapetum fibrosum is imbedded in siliconising material, siliconising 3 hours obtained siliconising carbon fiber blankets at the temperature of 1800 DEG C in vacuum atmosphere, wherein, siliconising material is silica flour 50% and diameter, and that to be additional 15% concentration of 3mm carbon granule 50% be is dry obtained after the polyvinyl alcohol water solution Homogeneous phase mixing of 0.6%;
(5) by above-mentioned siliconising carbon fiber blanket nitriding treatment 24 hours obtained wolfram varbide norbide-carbon fiber friction materials at the temperature of 1350 DEG C.
Claims (1)
1. close the preparation method of fat dispersion wolfram varbide norbide-carbon fiber friction material, it is characterized in that, be 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket carries out the process of depositing silicon boron after carrying out carburizing treatment, carry out conjunction fat dispersion wolfram varbide again and fill process, carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment is obtained closes fat dispersion wolfram varbide norbide-carbon fiber friction material, and concrete steps are as follows again:
(1) be 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket passes into the mixed gas of propane flammable gas and nitrogen at 900 ~ 1100 DEG C of temperature, propane flammable gas: the mol ratio of nitrogen is 1:4 ~ 6, and flow control is at 50 ~ 600ml/min, and carburizing treatment obtains carburizing carbon fiber blanket for 10 ~ 24 hours;
(2) above-mentioned carburizing carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixed gas of boron trichloride, methane, hydrogen and argon gas, boron trichloride: methane: hydrogen: the mol ratio of argon gas is 1:1 ~ 2:3 ~ 6:4 ~ 6, flow control is at 50 ~ 600ml/min, and the process of depositing silicon boron obtains depositing silicon boron carbon fiber blanket for 10 ~ 24 hours;
(3) above-mentioned depositing silicon boron carbon fiber blanket being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5 ~ 20% wolfram varbides, be placed in ultrasonic cleaner and fill wolfram varbide process 30 ~ 50 minutes, obtained filling tungsten carbide carbon tapetum fibrosum after taking out drying, wherein closing fat slurry is contain the ethanolic soln closing fat 5 ~ 20%;
(4) above-mentioned filling tungsten carbide carbon tapetum fibrosum is imbedded in siliconising material, siliconising process 3 ~ 5 hours obtained siliconising carbon fiber blankets at the temperature of 1500 ~ 1800 DEG C in vacuum atmosphere, wherein, additional 5 ~ 15% concentration of mixture of siliconising material to be silica flour 30 ~ 50% and diameter be 0.5 ~ 3mm carbon granule 50 ~ 70% are obtain after the polyvinyl alcohol water solution Homogeneous phase mixing drying of 0.2 ~ 0.6%;
(5) above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained fat that closes at the temperature of 1350 ~ 1700 DEG C is disperseed wolfram varbide norbide-carbon fiber friction material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115925434A (en) * | 2022-12-20 | 2023-04-07 | 湖南金博碳素股份有限公司 | Tungsten carbide and chromium carbide composite material, preparation method and application thereof, and cutter |
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| CN101508591A (en) * | 2008-11-10 | 2009-08-19 | 西北工业大学 | Process for producing composite material of Ti3SiC2 modified C/SiC |
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| CN104909790A (en) * | 2015-05-26 | 2015-09-16 | 中国科学院上海硅酸盐研究所 | Two-dimensional fiber/boron nitride nanotube multistage reinforcement and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115925434A (en) * | 2022-12-20 | 2023-04-07 | 湖南金博碳素股份有限公司 | Tungsten carbide and chromium carbide composite material, preparation method and application thereof, and cutter |
| CN115925434B (en) * | 2022-12-20 | 2023-07-25 | 湖南金博碳素股份有限公司 | Tungsten carbide and chromium carbide composite material, preparation method and application thereof, and cutter |
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