CN105418123B - Close the preparation method that fat disperses tungsten carbide boron carbide carbon fiber friction material - Google Patents
Close the preparation method that fat disperses tungsten carbide boron carbide carbon fiber friction material Download PDFInfo
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- CN105418123B CN105418123B CN201610014379.0A CN201610014379A CN105418123B CN 105418123 B CN105418123 B CN 105418123B CN 201610014379 A CN201610014379 A CN 201610014379A CN 105418123 B CN105418123 B CN 105418123B
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Abstract
Close the preparation method that fat disperses tungsten carbide boron carbide carbon fiber friction material, it is characterised in that by density be 0.1 ~ 1.8g/cm3Graphited carbon fiber blanket carries out depositing silicon boron processing after carrying out Carburization Treatment, carry out closing the scattered tungsten carbide filling processing of fat again, carry out being embedded to siliconising processing again, then nitrogen treatment is made and closes the scattered tungsten carbide boron carbide carbon fiber friction material of fat in nitrogen atmosphere.The present invention is to realize the preparation of friction material by carburizing, depositing silicon silicon, filling tungsten carbide, the embedment step such as siliconising and nitridation using graphitized carbon fibre blanket, prepared friction material high intensity, high tenacity, high frictional behaviour, adapt to the friction material under various weather conditions.
Description
Technical field
The present invention relates to a kind of preparation method of the compound friction material of carbon fiber and ceramic material, belong to composite system
Standby technical field.
Background technology
Friction material is at present mainly using carbon fiber and carbon(C/C)Composite is wear-resisting due to C/C composites
Performance is relatively low, and people are seeking the preparation method of the higher friction material of anti-wear performance.In addition, C/C composites exist
In moist environment, its frictional behaviour can be reduced, and serious potential safety hazard is brought to using.
The content of the invention
It can overcome drawbacks described above it is an object of the invention to provide one kind, realize preparation higher intensity, higher frictional behaviour
And adapt to the preparation method of the friction material of various weather conditions.Its technical scheme is:
Close fat disperse tungsten carbide carbonization boron-carbon fiber friction material preparation method be by density be 0.1 ~ 1.8 g/cm3
Graphited carbon fiber blanket carries out depositing silicon boron processing after carrying out Carburization Treatment, then close at the scattered tungsten carbide filling of fat
Reason, then carry out being embedded to siliconising processing, then the obtained fat that closes of nitrogen treatment disperses tungsten carbide carbonization boron-carbon fiber in nitrogen atmosphere
Friction material, comprise the following steps that:
(1)It is 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket be passed through at a temperature of 900 ~ 1100 DEG C propane flammable gas and
The mixed gas of nitrogen, propane flammable gas:The mol ratio of nitrogen is 1:4 ~ 6, flow control in 50 ~ 600ml/min, Carburization Treatment 10 ~
Obtain carburizing carbon fiber blanket within 24 hours;
(2)Above-mentioned carburizing carbon fiber blanket is passed through boron chloride, methane, hydrogen and argon gas at a temperature of 900 ~ 1100 DEG C
Mixed gas, boron chloride:Methane:Hydrogen:The mol ratio of argon gas is 1:1~2:3~6:4 ~ 6, flow is controlled in 50 ~ 600ml/
Min, depositing silicon boron handle 10 ~ 24 hours and obtain depositing silicon boron carbon fiber blanket;
(3)Above-mentioned depositing silicon boron carbon fiber blanket is immersed into granularity and is less than conjunction fat slurry of 0.3 μm of content for 5 ~ 20% tungsten carbides
In material, it is placed in ultrasonic cleaner and fills tungsten carbide processing 30 ~ 50 minutes, takes out and filling tungsten carbide carbon fiber is made after drying
Blanket, wherein it is containing the ethanol solution for closing fat 5 ~ 20% to close fat slurry;
(4)Above-mentioned filling tungsten carbide carbon tapetum fibrosum is embedded in siliconising material, 1500 ~ 1800 DEG C of the temperature in vacuum atmosphere
Lower siliconising handles 3 ~ 5 hours obtained siliconising carbon fiber blankets, wherein, siliconising material is silica flour 30 ~ 50% and a diameter of 0.5 ~ 3mm carbon granules
It is made after the uniform combination drying of polyvinyl alcohol water solution that 50 ~ 70% additional 5 ~ 15% concentration of mixture is 0.2 ~ 0.6%;
(5)By above-mentioned siliconising carbon fiber blanket, nitrogen treatment is made and closes fat point for 10 ~ 24 hours at a temperature of 1350 ~ 1700 DEG C
Dissipate tungsten carbide carbonization boron-carbon fiber friction material.
Compared with prior art, its advantage is the present invention:
1st, the carbon fiber blanket that uses of the present invention is graphited carbon fiber blanket, or graphited needled carbon tapetum fibrosum, or stone
The weaving carbon fiber cloth of inkization, or graphited 3 D weaving carbon fiber knit block;
2nd, the friction material for preparing of the present invention is by compound a kind of high-strength of carbon fiber and boron carbide, tungsten carbide, silicon nitride
Friction material under degree, high frictional behaviour, the various weather conditions of adaptation;
3rd, the system of friction material is realized by carburizing, depositing silicon boron, filling tungsten carbide, the embedment step such as siliconising and nitridation
It is standby, two steps of carburizing and depositing silicon boron be in order to protect carbon fiber surface not to be damaged and carbon fiber surface assign charcoal
Coating and boron carbide coating, because boron carbide coating can stop the infiltration of silicon steam, boron carbide coating one during siliconising
Denier seepage, carbide coatings and silicon steam reaction generation carborundum further stop silicon steam, so as to protect carbon fiber surface not by
Destroy;
4th, carbon fiber blanket has the very high porosity, depends merely on carburizing and depositing silicon boron may require that and be lot more time to reach
Densification, manufacturing cost is very high, will be very using the space of filling tungsten carbide and the method filling carbon fiber blanket for being embedded to siliconising
It is convenient, it is time saving and energy saving, while fill tungsten carbide and can further improve the anti-wear performance of friction material;
5th, the present invention produces microvesicle in the slurry using the effect of ultrasonic acoustic, when acoustic pressure or the sound intensity reach to a certain degree
When, microvesicle will expand rapidly, and then closure, the moment of microvesicle closure produce shock wave, make to produce about around microvesicle suddenly again
1012Pa pressure, tungsten carbide particle is forced to be filled into the space of depositing silicon silicon-carbon tapetum fibrosum, reaches the purpose of calking;
6th, using the scattered tungsten carbide filling processing of fat slurry is closed, tungsten carbide particle suspendability can be effectively improved, is improved
Charging efficiency, the activated carbon formed after fat high temperature carbonization is closed wraps up tungsten carbide particle, anti-with silicon steam during siliconising
Carborundum should be formed, tungsten carbide particle is firmly combined together by the carborundum of generation;
7th, it is 1420 DEG C or so because the metallic silicon fusing point of infiltration is relatively low, the temperature of friction material working face is instantaneously up near
2000 DEG C, metallic silicon is nitrogenized into generation silicon nitride, the friction material of microcellular structure is formed, friction material work can be increased substantially
Make the tolerable temperature in face, improve the service life of friction material.
Embodiment
Embodiment 1
(1)It is 1.8g/cm by density3Graphited carbon fiber blanket is passed through the mixed of propane flammable gas and nitrogen at a temperature of 900 DEG C
Close gas, propane flammable gas:The mol ratio of nitrogen is 1:4, flow control obtains carburizing carbon in 24 hours in 50ml/min, Carburization Treatment
Tapetum fibrosum;
(2)Above-mentioned carburizing carbon fiber blanket is passed through to the mixing of boron chloride, methane, hydrogen and argon gas at a temperature of 900 DEG C
Gas, boron chloride:Methane:Hydrogen:The mol ratio of argon gas is 1:1:3:4, flow is controlled at 50ml/min, depositing silicon boron
Reason obtains depositing silicon boron carbon fiber blanket in 24 hours;
(3)Above-mentioned depositing silicon boron carbon fiber blanket is immersed into granularity and is less than the conjunction fat slurry that 0.3 μm of content is 5% tungsten carbide
In, it is placed in ultrasonic cleaner and fills tungsten carbide processing 50 minutes, takes out and filling tungsten carbide carbon tapetum fibrosum, conjunction are made after drying
Fat slurry is containing the ethanol solution for closing fat 5%;
(4)Above-mentioned filling tungsten carbide carbon tapetum fibrosum is embedded in siliconising material, oozed in vacuum atmosphere at a temperature of 1500 DEG C
5 hours obtained siliconising carbon fiber blankets of silicon, wherein, siliconising material is silica flour 30% and additional 5% concentration of a diameter of 0.5mm carbon granules 70% is
0.2% polyvinyl alcohol water solution is dried after uniformly mixing and is made;
(5)By above-mentioned siliconising carbon fiber blanket at a temperature of 1700 DEG C 10 hours obtained tungsten carbide boron carbides of nitrogen treatment-
Carbon fiber friction material.
Embodiment 2
(1)It is 0.8g/cm by density3Graphited carbon fiber blanket is passed through the mixed of propane flammable gas and nitrogen at a temperature of 1000 DEG C
Close gas, propane flammable gas:The mol ratio of nitrogen is 1:5, flow control obtains carburizing in 18 hours in 350ml/min, Carburization Treatment
Carbon fiber blanket;
(2)Above-mentioned carburizing carbon fiber blanket is passed through to the mixing of boron chloride, methane, hydrogen and argon gas at a temperature of 1000 DEG C
Gas, boron chloride:Methane:Hydrogen:The mol ratio of argon gas is 1:1.5:4.5:5, flow control is in 350ml/min, deposition carbon
Change boron and handle 18 hours acquisition depositing silicon boron carbon fiber blankets;
(3)Above-mentioned depositing silicon boron carbon fiber blanket is immersed into granularity and is less than the conjunction fat slurry that 0.3 μm of content is 12% tungsten carbide
In, it is placed in ultrasonic cleaner and fills tungsten carbide processing 40 minutes, takes out and filling tungsten carbide carbon tapetum fibrosum, conjunction are made after drying
Fat slurry is containing the ethanol solution for closing fat 12%;
(4)Above-mentioned filling tungsten carbide carbon tapetum fibrosum is embedded in siliconising material, oozed in vacuum atmosphere at a temperature of 1650 DEG C
4 hours obtained siliconising carbon fiber blankets of silicon, wherein, siliconising material is silica flour 40% and additional 10% concentration of a diameter of 2mm carbon granules 60% is
0.4% polyvinyl alcohol water solution is dried after uniformly mixing and is made;
(5)By above-mentioned siliconising carbon fiber blanket at a temperature of 1550 DEG C 18 hours obtained tungsten carbide boron carbides of nitrogen treatment-
Carbon fiber friction material.
Embodiment 3
(1)It is 0.1g/cm by density3Graphited carbon fiber blanket is passed through the mixed of propane flammable gas and nitrogen at a temperature of 1100 DEG C
Close gas, propane flammable gas:The mol ratio of nitrogen is 1:6, flow control obtains carburizing in 10 hours in 600ml/min, Carburization Treatment
Carbon fiber blanket;
(2)Above-mentioned carburizing carbon fiber blanket is passed through to the mixing of boron chloride, methane, hydrogen and argon gas at a temperature of 1100 DEG C
Gas, boron chloride:Methane:Hydrogen:The mol ratio of argon gas is 1:2:6:6, flow is controlled in 600 ml/min, depositing silicon boron
Processing obtains depositing silicon boron carbon fiber blanket in 10 hours;
(3)Above-mentioned depositing silicon boron carbon fiber blanket is immersed into granularity and is less than the conjunction fat slurry that 0.3 μm of content is 20% tungsten carbide
In, it is placed in ultrasonic cleaner and fills tungsten carbide processing 30 minutes, takes out and filling tungsten carbide carbon tapetum fibrosum, conjunction are made after drying
Fat slurry is containing the ethanol solution for closing fat 20%;
(4)Above-mentioned filling tungsten carbide carbon tapetum fibrosum is embedded in siliconising material, oozed in vacuum atmosphere at a temperature of 1800 DEG C
3 hours obtained siliconising carbon fiber blankets of silicon, wherein, siliconising material is silica flour 50% and additional 15% concentration of a diameter of 3mm carbon granules 50% is
0.6% polyvinyl alcohol water solution is dried after uniformly mixing and is made;
(5)By above-mentioned siliconising carbon fiber blanket at a temperature of 1350 DEG C 24 hours obtained tungsten carbide boron carbides of nitrogen treatment-
Carbon fiber friction material.
Claims (1)
1. close fat disperse tungsten carbide carbonization boron-carbon fiber friction material preparation method, it is characterised in that by density be 0.1 ~
1.8g/cm3Graphited carbon fiber blanket carries out depositing silicon boron processing after carrying out Carburization Treatment, then carries out closing the scattered tungsten carbide of fat
Filling is handled, then carries out being embedded to siliconising processing, then in nitrogen atmosphere nitrogen treatment be made close fat disperse tungsten carbide boron carbide-
Carbon fiber friction material, comprise the following steps that:
(1)It is 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket is passed through propane flammable gas and nitrogen at a temperature of 900 ~ 1100 DEG C
Mixed gas, propane flammable gas:The mol ratio of nitrogen is 1:4 ~ 6, flow control is small in 50 ~ 600mL/min, Carburization Treatment 10 ~ 24
When obtain carburizing carbon fiber blanket;
(2)Above-mentioned carburizing carbon fiber blanket is passed through to the mixing of boron chloride, methane, hydrogen and argon gas at a temperature of 900 ~ 1100 DEG C
Gas, boron chloride:Methane:Hydrogen:The mol ratio of argon gas is 1:1~2:3~6:4 ~ 6, flow is controlled in 50 ~ 600mL/min, is sunk
Product boron carbide handles 10 ~ 24 hours and obtains depositing silicon boron carbon fiber blanket;
(3)Above-mentioned depositing silicon boron carbon fiber blanket is immersed into granularity and is less than the conjunction fat slurry that 0.3 μm of content is 5 ~ 20% tungsten carbides
In, it is placed in ultrasonic cleaner and fills tungsten carbide processing 30 ~ 50 minutes, takes out and filling tungsten carbide carbon fiber is made after drying
Blanket, wherein it is containing the ethanol solution for closing fat 5 ~ 20% to close fat slurry;
(4)Above-mentioned filling tungsten carbide carbon tapetum fibrosum is embedded in siliconising material, oozed in vacuum atmosphere at a temperature of 1500 ~ 1800 DEG C
Silicon handles 3 ~ 5 hours obtained siliconising carbon fiber blankets, wherein, siliconising material be silica flour 30 ~ 50% and a diameter of 0.5 ~ 3mm carbon granules 50 ~
It is made after the uniform combination drying of polyvinyl alcohol water solution that 70% additional 5 ~ 15% concentration of mixture is 0.2 ~ 0.6%;
(5)By above-mentioned siliconising carbon fiber blanket, nitrogen treatment is made and closes the scattered carbon of fat for 10 ~ 24 hours at a temperature of 1350 ~ 1700 DEG C
Change tungsten boron carbide-carbon fiber friction material.
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