CN105481420A - Preparing method for synthetic fat dispersed titanium carbide silicon carbide-carbon fiber friction material - Google Patents

Preparing method for synthetic fat dispersed titanium carbide silicon carbide-carbon fiber friction material Download PDF

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CN105481420A
CN105481420A CN201610014279.8A CN201610014279A CN105481420A CN 105481420 A CN105481420 A CN 105481420A CN 201610014279 A CN201610014279 A CN 201610014279A CN 105481420 A CN105481420 A CN 105481420A
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carbon fiber
carbide
fiber blanket
silicon carbide
siliconising
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CN105481420B (en
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唐竹兴
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Shandong University of Technology
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Abstract

The invention provides a preparing method for a synthetic fat dispersed titanium carbide silicon carbide-carbon fiber friction material. The preparing method is characterized in that a graphited carbon fiber blanket with the density being 0.1-1.8 g/cm<3> is subjected to synthetic fat dispersed titanium carbide filling treatment after being subjected to carburizing treatment, then silicon carbide deposition treatment is carried out, then burying siliconizing treatment is carried out, and then nitridation treatment is carried out in nitrogen atmosphere, so that the synthetic fat dispersed titanium carbide silicon carbide-carbon fiber friction material is prepared. According to the method, the graphited carbon fiber blanket is adopted for being subjected to carburization, titanium carbide filling, silicon carbide deposition, burying siliconizing, nitridation and the like to prepare the friction material, and the prepared friction material is high in strength, toughness and friction performance, and capable of adapting to various weather conditions.

Description

Close the preparation method of fat dispersion carbonization silicon titanium-carbide-carbon fiber friction material
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 carbonization silicon titanium-carbide-carbon fiber friction material is 0.1 ~ 1.8g/cm by density 3graphited carbon fiber blanket carries out conjunction fat dispersion titanium carbide and fills process after carrying out carburizing treatment, carry out depositing silicon carbide process again, carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment is obtained closes fat dispersion carbonization silicon titanium-carbide-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 being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5 ~ 20% titanium carbides, be placed in ultrasonic cleaner and fill titanium carbide process 30 ~ 50 minutes, obtained filling titanium carbide carbon fiber blanket after taking out drying, wherein closing fat slurry is contain the ethanolic soln closing fat 5 ~ 20%;
(3) above-mentioned filling titanium carbide carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixed gas of trichloromethyl silane gas, hydrogen and argon gas, depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 10 ~ 24 hours, wherein, trichloromethyl silane gas: hydrogen: the mol ratio of argon gas is 1:3 ~ 5:3 ~ 5, and flow is 50 ~ 600ml/min;
(4) above-mentioned depositing silicon carbide carbon fiber blanket 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 carbonization silicon titanium-carbide-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 silicon carbide, titanium carbide, a kind of high strength of silicon nitride compound, high frictional behaviour, the friction materials adapted under various weather condition;
3, by carburizing, fill titanium carbide, depositing silicon carbide, imbed the preparation that the step such as siliconising and nitrogenize realizes friction materials, carburizing and depositing silicon carbide two steps are at the carbon coating of carbon fiber surface imparting and coat of silicon carbide in order to protect carbon fiber surface not to be damaged, because coat of silicon carbide can stop the infiltration of silicon steam in the process of siliconising, coat of silicon carbide 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 carbide can need just can reach densification for a long time, manufacturing cost is very high, titanium carbide 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 titanium carbide can improve friction materials further simultaneously;
5, the present invention utilizes the snappiness of carburizing carbon fiber, microvesicle is produced by hyperacoustic slurry that acts on, when acoustic pressure or the sound intensity arrive to a certain degree, microvesicle will undergoes rapid expansion, then close suddenly again, the moment that microvesicle is closed produces shockwave, makes the pressure producing about 1012pa around microvesicle, titanium carbide granule is forced to be filled in the space of carbon fiber blanket, reaches the object of calking;
6, conjunction fat slurry dispersion titanium carbide is adopted to fill process, can effectively improve titanium carbide granule suspension property, improve charging efficiency, titanium carbide granule wraps up by the gac formed after closing fat high temperature carbonization, in siliconising process, form silicon carbide with silicon steam reaction, titanium carbide granule combines by Formed SiClx 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 performance and used 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 being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5% titanium carbide, be placed in ultrasonic cleaner and fill titanium carbide process 50 minutes, obtained filling titanium carbide carbon fiber blanket after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 5%;
(3) above-mentioned filling titanium carbide carbon fiber blanket is passed at 900 DEG C of temperature the mixed gas of trichloromethyl silane gas, hydrogen and argon gas, trichloromethyl silane gas: hydrogen: the mol ratio of argon gas is 1:5:5, flow control is at 50ml/min, and depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 24 hours;
(4) above-mentioned depositing silicon carbide carbon fiber blanket 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 titanium carbide silicon carbide―carbon fiber friction materialss 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 being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 12% titanium carbide, be placed in ultrasonic cleaner and fill titanium carbide process 40 minutes, obtained filling titanium carbide carbon fiber blanket after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 12%;
(3) above-mentioned filling titanium carbide carbon fiber blanket is passed at 1000 DEG C of temperature the mixed gas of trichloromethyl silane gas, hydrogen and argon gas, trichloromethyl silane gas: hydrogen: the mol ratio of argon gas is 1:4:4, flow control is at 350ml/min, and depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 18 hours;
(4) above-mentioned depositing silicon carbide carbon fiber blanket 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 titanium carbide silicon carbide―carbon fiber friction materialss 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 being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 20% titanium carbide, be placed in ultrasonic cleaner and fill titanium carbide process 30 minutes, obtained filling titanium carbide carbon fiber blanket after taking out drying, closing fat slurry is contain the ethanolic soln closing fat 20%;
(3) above-mentioned filling titanium carbide carbon fiber blanket is passed at 1100 DEG C of temperature the mixed gas of trichloromethyl silane gas, hydrogen and argon gas, trichloromethyl silane gas: hydrogen: the mol ratio of argon gas is 1:3:3, flow control is at 600ml/min, and depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 10 hours;
(4) above-mentioned depositing silicon carbide carbon fiber blanket 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 titanium carbide silicon carbide―carbon fiber friction materialss at the temperature of 1350 DEG C.

Claims (1)

1. close the preparation method of fat dispersion carbonization silicon titanium-carbide-carbon fiber friction material, it is characterized in that, be 0.1 ~ 1.8g/cm by density 3graphited carbon fiber blanket carries out conjunction fat dispersion titanium carbide and fills process after carrying out carburizing treatment, carry out depositing silicon carbide process again, carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment is obtained closes fat dispersion carbonization silicon titanium-carbide-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 being immersed granularity is less than in the conjunction fat slurry that 0.3 μm of content is 5 ~ 20% titanium carbides, be placed in ultrasonic cleaner and fill titanium carbide process 30 ~ 50 minutes, obtained filling titanium carbide carbon fiber blanket after taking out drying, wherein closing fat slurry is contain the ethanolic soln closing fat 5 ~ 20%;
(3) above-mentioned filling titanium carbide carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixed gas of trichloromethyl silane gas, hydrogen and argon gas, depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 10 ~ 24 hours, wherein, trichloromethyl silane gas: hydrogen: the mol ratio of argon gas is 1:3 ~ 5:3 ~ 5, and flow is 50 ~ 600ml/min;
(4) above-mentioned depositing silicon carbide carbon fiber blanket 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 carbonization silicon titanium-carbide-carbon fiber friction material.
CN201610014279.8A 2016-01-11 2016-01-11 Close the preparation method that fat disperses titanium carbide carborundum carbon fiber friction material Expired - Fee Related CN105481420B (en)

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CN103321036A (en) * 2013-06-29 2013-09-25 西北工业大学 Method for electrochemically modifying surface of ultrasonic-enhanced carbon fiber
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CN103321036A (en) * 2013-06-29 2013-09-25 西北工业大学 Method for electrochemically modifying surface of ultrasonic-enhanced carbon fiber
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