CN105481433A - Method for preparing ethyl alcohol dispersion zirconium boride silicon carbide-carbon fiber friction material - Google Patents
Method for preparing ethyl alcohol dispersion zirconium boride silicon carbide-carbon fiber friction material Download PDFInfo
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Abstract
A method for preparing an ethyl alcohol dispersion zirconium boride silicon carbide-carbon fiber friction material is characterized in that carbonization is conducted on a graphited carbon fiber blanket with the density of 0.1-1.8 g/cm3, then ethyl alcohol dispersion zirconium boride filling, silicon carbide deposition and submerged siliconizing are conducted in sequence, and finally nitriding is conducted in the nitrogen atmosphere to generate the ethyl alcohol dispersion zirconium boride silicon carbide-carbon fiber friction material. The friction material is prepared through carburization, zirconium boride filling, silicon carbide deposition, submerged siliconizing and nitriding of the graphited carbon fiber blanket, has high strength, tenacity and friction performance, and is adaptable to various weather 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 of ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materials, it is characterized in that, be 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket carries out ethanol dispersion zirconium boride 99.5004323A8ure 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 obtains ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materials, 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 immersion granularity is less than in the ethanol slurry that 0.3 μm of content is 5 ~ 20% zirconium boride 99.5004323A8ures, is placed in ultrasonic cleaner and fills the dry rear obtained filling zirconium boride 99.5004323A8ure carbon fiber blanket of zirconium boride 99.5004323A8ure process taking-up in 30 ~ 50 minutes;
(3) above-mentioned filling zirconium boride 99.5004323A8ure 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 under 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) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materialss at the temperature of 1350 ~ 1700 DEG C.
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 graphited carbon fiber and silicon carbide, zirconium boride 99.5004323A8ure, a kind of high strength of silicon nitride compound, high frictional behaviour, the friction materials adapted under various weather condition;
3, by carburizing, fill zirconium boride 99.5004323A8ure, 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, zirconium boride 99.5004323A8ure 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 zirconium boride 99.5004323A8ure can improve friction materials further simultaneously;
5, the present invention utilizes the snappiness of carburizing carbon fiber, microvesicle is produced by hyperacoustic ethanol 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, zirconium boride 99.5004323A8ure particle is forced to be filled in the space of carbon fiber blanket, reaches the object of calking;
6, adopt ethanol slurry dispersion zirconium boride 99.5004323A8ure to fill process, effectively can improve zirconium boride 99.5004323A8ure particle suspension property, improve charging efficiency, zirconium boride 99.5004323A8ure particle combines by silicon nitride securely that formed in nitriding treatment process;
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 immersed granularity to be less than in the ethanol slurry that 0.3 μm of content is 5% zirconium boride 99.5004323A8ure, be placed in ultrasonic cleaner and fill zirconium boride 99.5004323A8ure process 50 minutes, take out dry rear obtaining and fill zirconium boride 99.5004323A8ure carbon fiber blanket;
(3) above-mentioned filling zirconium boride 99.5004323A8ure 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 under 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 zirconium boride 99.5004323A8ure 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 is immersed granularity to be less than in the ethanol slurry that 0.3 μm of content is 12% zirconium boride 99.5004323A8ure, be placed in ultrasonic cleaner and fill zirconium boride 99.5004323A8ure process 40 minutes, take out dry rear obtaining and fill zirconium boride 99.5004323A8ure carbon fiber blanket;
(3) above-mentioned filling zirconium boride 99.5004323A8ure 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 under 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 zirconium boride 99.5004323A8ure 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 is immersed granularity to be less than in the ethanol slurry that 0.3 μm of content is 20% zirconium boride 99.5004323A8ure, be placed in ultrasonic cleaner and fill zirconium boride 99.5004323A8ure process 30 minutes, take out dry rear obtaining and fill zirconium boride 99.5004323A8ure carbon fiber blanket;
(3) above-mentioned filling zirconium boride 99.5004323A8ure 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 under 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 zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materialss at the temperature of 1350 DEG C.
Claims (1)
1. the preparation method of ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materials, it is characterized in that, be 0.1 ~ 1.8g/cm by density
3graphited carbon fiber blanket carries out ethanol dispersion zirconium boride 99.5004323A8ure 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 obtains ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materials, 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 immersed granularity to be less than in the ethanol slurry that 0.3 μm of content is 5 ~ 20% zirconium boride 99.5004323A8ures, be placed in ultrasonic cleaner and fill zirconium boride 99.5004323A8ure process 30 ~ 50 minutes, take out dry rear obtaining and fill zirconium boride 99.5004323A8ure carbon fiber blanket;
(3) above-mentioned filling zirconium boride 99.5004323A8ure 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 under 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) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained ethanol dispersion zirconium boride 99.5004323A8ure silicon carbide―carbon fiber friction materialss at the temperature of 1350 ~ 1700 DEG C.
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