CN105481429A - Preparation method of silicon nitride-silicon carbide-carbon fiber friction material - Google Patents

Preparation method of silicon nitride-silicon carbide-carbon fiber friction material Download PDF

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CN105481429A
CN105481429A CN201610014313.1A CN201610014313A CN105481429A CN 105481429 A CN105481429 A CN 105481429A CN 201610014313 A CN201610014313 A CN 201610014313A CN 105481429 A CN105481429 A CN 105481429A
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carbon fiber
silicon carbide
siliconising
fiber blanket
gas
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唐竹兴
田帅
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Shandong University of Technology
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Abstract

The invention relates to a preparation method of a silicon nitride-silicon carbide-carbon fiber friction material. The method is characterized in that carburizing treatment is conducted on a graphitized carbon fiber blanket of which the density ranges from 0.1 g/cm<3> to 1.8 g/cm<3>, silicon carbide deposition treatment is conducted, siliconizing embedding treatment is conducted, nitrogenation treatment is conducted in a nitrogen atmosphere, and the silicon nitride-silicon carbide-carbon fiber friction material is prepared. According to the preparation method of the silicon nitride-silicon carbide-carbon fiber friction material, the friction material is prepared through the steps of carburization, silicon carbon deposition, tungsten carbide filling, siliconizing embedding, nitrogenation and the like by adopting the graphitized carbon fiber blanket, and the prepared friction material is high in strength, toughness and friction property and capable of being suitable for various climatic conditions.

Description

A kind of preparation method of silicon nitride-silicon 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 of silicon nitride-silicon carbide-carbon fiber friction material is 0.1 ~ 1.8g/cm by density 3carry out depositing silicon carbide process after graphited carbon fiber blanket carries out carburizing treatment to carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment obtains silicon nitride-silicon 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: nitrogen mol ratio be 1:4 ~ 6, flow control is at 50 ~ 600ml/min, and carburizing treatment 10 ~ 24 hours obtains carburizing carbon fiber blanket;
(2) above-mentioned carburizing carbon fiber blanket is passed at 900 ~ 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 ~ 5:4 ~ 6, flow control is at 50 ~ 600ml/min, and depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 10 ~ 24 hours;
(3) above-mentioned depositing silicon carbide carbon fiber blanket is imbedded in siliconising material, siliconising 3 ~ 5 hours obtained siliconising carbon fiber blankets at the temperature of 1500 ~ 1800 DEG C under vacuum atmosphere, wherein, siliconising material is silica flour 30 ~ 50% and diameter, and that to be additional 5 ~ 15% concentration of 0.5 ~ 3mm carbon granule 50 ~ 70% be is dry obtained after the polyvinyl alcohol water solution Homogeneous phase mixing of 0.2 ~ 0.6%;
(4) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained silicon nitride-silicon carbide-carbon fiber friction materials 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 carbon fiber and silicon carbide, 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 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, adopt imbed the space of the method filling carbon fiber blanket of siliconising will be very convenient, time saving and energy saving, the wear resisting property of friction materials can be improved further simultaneously;
5, 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 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;
(3) 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%;
(4) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 hours obtained silicon nitride-silicon carbide-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 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;
(3) 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%;
(4) by above-mentioned siliconising carbon fiber blanket nitriding treatment 18 hours obtained silicon nitride-silicon carbide-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 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;
(3) 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%;
(4) by above-mentioned siliconising carbon fiber blanket nitriding treatment 24 hours obtained silicon nitride-silicon carbide-carbon fiber friction materials at the temperature of 1350 DEG C.

Claims (1)

1. a preparation method for silicon nitride-silicon carbide-carbon fiber friction material, is characterized in that, is 0.1 ~ 1.8g/cm by density 3carry out depositing silicon carbide process after graphited carbon fiber blanket carries out carburizing treatment to carry out imbedding siliconising process, then in nitrogen atmosphere, nitriding treatment obtains silicon nitride-silicon 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: nitrogen mol ratio be 1:4 ~ 6, flow control is at 100 ~ 600ml/min, and carburizing treatment 10 ~ 24 hours obtains carburizing carbon fiber blanket;
(2) above-mentioned carburizing carbon fiber blanket is passed at 900 ~ 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 ~ 5:4 ~ 6, flow control is at 50 ~ 600ml/min, and depositing silicon carbide process obtains depositing silicon carbide carbon fiber blanket for 10 ~ 24 hours;
(3) above-mentioned depositing silicon carbide carbon fiber blanket is imbedded in siliconising material, siliconising 3 ~ 5 hours obtained siliconising carbon fiber blankets at the temperature of 1500 ~ 1800 DEG C under vacuum atmosphere, wherein, siliconising material is silica flour 30 ~ 50% and diameter, and that to be additional 5 ~ 15% concentration of 0.5 ~ 3mm carbon granule 50 ~ 70% be is dry obtained after the polyvinyl alcohol water solution Homogeneous phase mixing of 0.2 ~ 0.6%;
(4) by above-mentioned siliconising carbon fiber blanket nitriding treatment 10 ~ 24 hours obtained silicon nitride-silicon carbide-carbon fiber friction materials at the temperature of 1350 ~ 1700 DEG C.
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Cited By (6)

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CN107445639A (en) * 2016-10-12 2017-12-08 平顺县西沟龙鼎新材料科技有限公司 A kind of preparation method of carbon/carbon porous body
CN107445640A (en) * 2016-10-12 2017-12-08 平顺县西沟龙鼎新材料科技有限公司 A kind of manufacture method of C/SiC novel mechanical sealing rings
CN109095939A (en) * 2018-09-18 2018-12-28 航天特种材料及工艺技术研究所 A kind of silicon carbide fiber reinforced silicon carbide composite material and preparation method thereof that tungsten carbide interface layer is modified
CN109265189A (en) * 2018-10-15 2019-01-25 西北工业大学 Microwave-absorbing ceramic based composites fast preparation method with electromagnetic resistivity gradual change matrix
CN110683853A (en) * 2019-11-28 2020-01-14 湖南博云新材料股份有限公司 Preparation method of silicon nitride and silicon carbide combined friction material
CN115368141A (en) * 2022-09-15 2022-11-22 湖南博云新材料股份有限公司 alpha-SiC and amorphous silicon nitride complex phase ceramic brake material and preparation method thereof

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