CN105622134A - Preparation method for ultrasonically-dispersed tungsten boride/silicon carbide-carbon fiber friction material - Google Patents
Preparation method for ultrasonically-dispersed tungsten boride/silicon carbide-carbon fiber friction material Download PDFInfo
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Abstract
The invention discloses a preparation method for an ultrasonically-dispersed tungsten boride/silicon carbide-carbon fiber friction material. The method is characterized in that a graphitized carbon fiber blanket of which the density is 0.1 to 1.8g/cm<3> is carburized, ultrasonically-dispersed tungsten boride is filled, silicon carbide is deposited, burying siliconizing is performed, and then nitrogen treatment is performed in a nitrogen atmosphere so as to obtain the ultrasonically-dispersed tungsten boride/silicon carbide-carbon fiber friction material. According to the method, the friction material can be prepared by means of the steps of carburizing the graphitized carbon fiber blanket, filling the tungsten boride, depositing the silicon carbide, and performing burying siliconizing, nitrogen treatment and the like. The prepared friction material is high in strength, high in toughness and high in friction performance, and is a friction material adaptive to various climatic conditions.
Description
Technical field
The preparation method that the present invention relates to the friction material of a kind of carbon fiber and ceramic material compound, belongs to technical field of composite preparation.
Background technology
What friction material currently mainly adopted is carbon fiber and carbon (C/C) composite, owing to the anti-wear performance of C/C composite is relatively low, and the preparation method that people are seeking the higher friction material of anti-wear performance. It addition, C/C composite is in a humid environment, its frictional behaviour can reduce, and brings serious potential safety hazard to using.
Summary of the invention
It is an object of the invention to provide and a kind of can overcome drawbacks described above, realize preparation higher intensity, higher frictional behaviour and adapt to the preparation method of friction material of various weather conditions. Its technical scheme is:
The preparation method of ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction material is to be 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket carries out ultrasound wave dispersion tungsten boride filling and processes after carrying out Carburization Treatment, it is deposited carborundum again to process, carrying out embedment siliconising again to process, then in nitrogen atmosphere, nitrogen treatment prepares ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction material, specifically comprises the following steps that
(1) it is 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket passes into the mixing 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 Carburization Treatment obtains carburizing carbon fiber blanket in 10 ~ 24 hours;
(2) above-mentioned carburizing carbon fiber blanket is immersed in the slurry that granularity is 5 ~ 20% tungsten borides less than 0.3 ��m of content, it is placed in ultrasonic cleaner and fills tungsten boride process 30 ~ 50 minutes, take out dried preparing and fill tungsten boride carbon fiber blanket, wherein, slurry is 0.5 ~ 1.5%pH value containing ammonium polyacrylate is the aqueous solution of 9 ~ 11;
(3) above-mentioned filling tungsten boride carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixing gas of trichloromethyl silane gas, hydrogen and argon, depositing silicon silicon processes 10 ~ 24 hours and obtains depositing silicon silicon-carbon tapetum fibrosum, wherein, trichloromethyl silane gas: hydrogen: the mol ratio of argon is 1:3 ~ 5:3 ~ 5, flow is 50 ~ 600ml/min;
(4) above-mentioned depositing silicon silicon-carbon tapetum fibrosum is imbedded in siliconising material, in vacuum atmosphere, at the temperature of 1500 ~ 1800 DEG C, siliconising processes 3 ~ 5 hours prepared siliconising carbon fiber blankets, wherein, siliconising material is silica flour 30 ~ 50% and the polyvinyl alcohol water solution Homogeneous phase mixing that additional 1 ~ 3% concentration of mixture is 0.2 ~ 0.6% that diameter is 0.5 ~ 3mm carbon granule 50 ~ 70% prepares after drying;
(5) by above-mentioned siliconising carbon fiber blanket 10 ~ 24 hours prepared ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction materials of nitrogen treatment at the temperature of 1350 ~ 1700 DEG C.
Compared with prior art, its advantage is 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, friction material prepared by the present invention is by carbon fiber and carborundum, tungsten boride, a kind of high intensity of silicon nitride compound, high frictional behaviour, the friction material that adapts under various weather conditions;
3, by carburizing, fill tungsten boride, depositing silicon silicon, embedment siliconising and the step such as nitrogenize and realize the preparation of friction material, carburizing and two steps of depositing silicon silicon be in order to protect carbon fiber surface not to be damaged and carbon fiber surface give carbon coating and coat of silicon carbide, 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 generate carborundum and stop silicon steam further, thus protecting carbon fiber surface not to be damaged;
4, carbon fiber blanket has the significantly high porosity, depend merely on carburizing and depositing silicon silicon may require that and is lot more time to reach densification, manufacturing cost is significantly high, the space adopting the method filling carbon fiber blanket filling tungsten boride and embedment siliconising will be very convenient, time saving and energy saving, fill tungsten boride simultaneously and can improve the anti-wear performance of friction material further;
5, the present invention utilizes the pliability of carburizing carbon fiber, microvesicle is produced in the slurry by hyperacoustic effect, when acoustic pressure or the sound intensity arrive to a certain degree, microvesicle will expand rapidly, then closing suddenly again, the moment of microvesicle Guan Bi produces shock wave, makes to produce around microvesicle the pressure of about 1012pa, force tungsten boride granule to be filled in the space of carbon fiber blanket, reach the purpose of calking;
6, slurry dispersion tungsten boride filling is adopted to process, it is possible to be effectively improved tungsten boride granule suspendability, improve charging efficiency, nitridation process generates silicon nitride and is firmly combined together by tungsten boride granule;
7, due to penetrate into metallic silicon fusing point relatively low be about 1420 DEG C, the temperature of friction material work surface is instantaneous up to nearly 2000 DEG C, metallic silicon is nitrogenized generation silicon nitride, form the friction material of microcellular structure, the tolerable temperature of friction material work surface can be increased substantially, improve the performance and used life of friction material.
Detailed description of the invention
Embodiment 1
(1) it is 1.8g/cm by density3Graphited carbon fiber blanket passes into the mixing 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 Carburization Treatment obtains carburizing carbon fiber blanket in 24 hours;
(2) above-mentioned carburizing carbon fiber blanket is immersed in the slurry that granularity is 5% tungsten boride less than 0.3 ��m of content, it is placed in ultrasonic cleaner and fills tungsten boride process 50 minutes, taking out dried preparing and fill tungsten boride carbon fiber blanket, slurry is the 1.5%pH value containing ammonium polyacrylate is the aqueous solution of 9;
(3) above-mentioned filling tungsten boride carbon fiber blanket is passed at 900 DEG C of temperature the mixing gas of trichloromethyl silane gas, hydrogen and argon, trichloromethyl silane gas: hydrogen: the mol ratio of argon is 1:5:5, flow-control is at 50ml/min, and depositing silicon silicon processes 24 hours and obtains depositing silicon silicon-carbon tapetum fibrosum;
(4) above-mentioned depositing silicon silicon-carbon tapetum fibrosum is imbedded in siliconising material, 5 hours prepared siliconising carbon fiber blankets of siliconising at the temperature of 1500 DEG C in vacuum atmosphere, wherein, siliconising material be silica flour 30% and diameter to be additional 5% concentration of 0.5mm carbon granule 70% be 0.2% polyvinyl alcohol water solution Homogeneous phase mixing after dry prepare;
(5) by above-mentioned siliconising carbon fiber blanket 10 hours prepared tungsten boride silicon carbide?carbon fiber friction materials of nitrogen treatment at the temperature of 1700 DEG C.
Embodiment 2
(1) it is 0.8g/cm by density3Graphited carbon fiber blanket passes into the mixing 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 Carburization Treatment obtains carburizing carbon fiber blanket in 18 hours;
(2) above-mentioned carburizing carbon fiber blanket is immersed in the slurry that granularity is 12% tungsten boride less than 0.3 ��m of content, it is placed in ultrasonic cleaner and fills tungsten boride process 40 minutes, taking out dried preparing and fill tungsten boride carbon fiber blanket, slurry is the 1%pH value containing ammonium polyacrylate is the aqueous solution of 10;
(3) above-mentioned filling tungsten boride carbon fiber blanket is passed at 1000 DEG C of temperature the mixing gas of trichloromethyl silane gas, hydrogen and argon, trichloromethyl silane gas: hydrogen: the mol ratio of argon is 1:4:4, flow-control is at 350ml/min, and depositing silicon silicon processes 18 hours and obtains depositing silicon silicon-carbon tapetum fibrosum;
(4) above-mentioned depositing silicon silicon-carbon tapetum fibrosum is imbedded in siliconising material, 4 hours prepared siliconising carbon fiber blankets of siliconising at the temperature of 1650 DEG C in vacuum atmosphere, wherein, siliconising material be silica flour 40% and diameter to be additional 10% concentration of 2mm carbon granule 60% be 0.4% polyvinyl alcohol water solution Homogeneous phase mixing after dry prepare;
(5) by above-mentioned siliconising carbon fiber blanket 18 hours prepared tungsten boride silicon carbide?carbon fiber friction materials of nitrogen treatment at the temperature of 1550 DEG C.
Embodiment 3
(1) it is 0.1g/cm by density3Graphited carbon fiber blanket passes into the mixing 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 Carburization Treatment obtains carburizing carbon fiber blanket in 10 hours;
(2) above-mentioned carburizing carbon fiber blanket is immersed in the slurry that granularity is 20% tungsten boride less than 0.3 ��m of content, it is placed in ultrasonic cleaner and fills tungsten boride process 30 minutes, taking out dried preparing and fill tungsten boride carbon fiber blanket, slurry is the 0.5%pH value containing ammonium polyacrylate is the aqueous solution of 11;
(3) above-mentioned filling tungsten boride carbon fiber blanket is passed at 1100 DEG C of temperature the mixing gas of trichloromethyl silane gas, hydrogen and argon, trichloromethyl silane gas: hydrogen: the mol ratio of argon is 1:3:3, flow-control is at 600ml/min, and depositing silicon silicon processes 10 hours and obtains depositing silicon silicon-carbon tapetum fibrosum;
(4) above-mentioned depositing silicon silicon-carbon tapetum fibrosum is imbedded in siliconising material, 3 hours prepared siliconising carbon fiber blankets of siliconising at the temperature of 1800 DEG C in vacuum atmosphere, wherein, siliconising material be silica flour 50% and diameter to be additional 15% concentration of 3mm carbon granule 50% be 0.6% polyvinyl alcohol water solution Homogeneous phase mixing after dry prepare;
(5) by above-mentioned siliconising carbon fiber blanket 24 hours prepared tungsten boride silicon carbide?carbon fiber friction materials of nitrogen treatment at the temperature of 1350 DEG C.
Claims (1)
1. the preparation method of ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction material, it is characterised in that be 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket carries out ultrasound wave dispersion tungsten boride filling and processes after carrying out Carburization Treatment, it is deposited carborundum again to process, carrying out embedment siliconising again to process, then in nitrogen atmosphere, nitrogen treatment prepares ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction material, specifically comprises the following steps that
(1) it is 0.1 ~ 1.8g/cm by density3Graphited carbon fiber blanket passes into the mixing 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 Carburization Treatment obtains carburizing carbon fiber blanket in 10 ~ 24 hours;
(2) above-mentioned carburizing carbon fiber blanket is immersed in the slurry that granularity is 5 ~ 20% tungsten borides less than 0.3 ��m of content, it is placed in ultrasonic cleaner and fills tungsten boride process 30 ~ 50 minutes, take out dried preparing and fill tungsten boride carbon fiber blanket, wherein, slurry is 0.5 ~ 1.5%pH value containing ammonium polyacrylate is the aqueous solution of 9 ~ 11;
(3) above-mentioned filling tungsten boride carbon fiber blanket is passed at 900 ~ 1100 DEG C of temperature the mixing gas of trichloromethyl silane gas, hydrogen and argon, depositing silicon silicon processes 10 ~ 24 hours and obtains depositing silicon silicon-carbon tapetum fibrosum, wherein, trichloromethyl silane gas: hydrogen: the mol ratio of argon is 1:3 ~ 5:3 ~ 5, flow is 50 ~ 600ml/min;
(4) above-mentioned depositing silicon silicon-carbon tapetum fibrosum is imbedded in siliconising material, in vacuum atmosphere, at the temperature of 1500 ~ 1800 DEG C, siliconising processes 3 ~ 5 hours prepared siliconising carbon fiber blankets, wherein, siliconising material is silica flour 30 ~ 50% and the polyvinyl alcohol water solution Homogeneous phase mixing that additional 1 ~ 3% concentration of mixture is 0.2 ~ 0.6% that diameter is 0.5 ~ 3mm carbon granule 50 ~ 70% prepares after drying;
(5) by above-mentioned siliconising carbon fiber blanket 10 ~ 24 hours prepared ultrasound wave dispersion tungsten boride silicon carbide?carbon fiber friction materials of nitrogen treatment at the temperature of 1350 ~ 1700 DEG C.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922777A (en) * | 2014-04-09 | 2014-07-16 | 上海大学 | Method for preparing carbon/carbon-silicon carbide composite material for bearings |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922777A (en) * | 2014-04-09 | 2014-07-16 | 上海大学 | Method for preparing carbon/carbon-silicon carbide composite material for bearings |
| 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 |
Non-Patent Citations (1)
| Title |
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| 李凤生等: "《微纳米粉体后处理技术及应用》", 30 September 2005 * |
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