CN111099900A - 一种碳化硅膜连续碳纤维束的制备方法 - Google Patents
一种碳化硅膜连续碳纤维束的制备方法 Download PDFInfo
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 68
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 68
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 68
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 229910002804 graphite Inorganic materials 0.000 claims description 22
- 239000010439 graphite Substances 0.000 claims description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000007740 vapor deposition Methods 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- DWAWYEUJUWLESO-UHFFFAOYSA-N trichloromethylsilane Chemical compound [SiH3]C(Cl)(Cl)Cl DWAWYEUJUWLESO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 238000000197 pyrolysis Methods 0.000 abstract description 2
- 239000007888 film coating Substances 0.000 abstract 1
- 238000009501 film coating Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
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- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
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Abstract
一种碳化硅膜连续碳纤维束的制备方法,其特征在于,连续碳纤维束是在碳化硅膜连续碳纤维束镀膜机中通入工艺气体在被加热的碳纤维束表面连续沉积碳化硅制成碳化硅膜连续碳纤维束。本发明是采用碳化硅膜连续碳纤维束镀膜机,直接加热碳纤维束,高温裂解生成的碳化硅绝大部分沉积在碳纤维束的表面,极少部分沉积在隔热屏上,碳化硅膜连续碳纤维束和碳化硅膜的厚度可以随机任意选择,不但节省原材料、节能且生产效率高。
Description
技术领域
本发明涉及一种碳纤维和陶瓷复合材料的制备方法,属于复合材料制备技术领域。
背景技术
碳纤维表面沉积碳化硅膜通常是将碳纤维放入沉积炉内间歇式制备,效率非常低,且碳纤维的长度和形态无法满足需要。另外,碳纤维在间歇式炉内为被动受热,大部分碳化硅沉积在温度较高的坩埚内壁上,耗能大,且事倍功半。另外,大型热工设备使用碳化硅陶瓷管、碳化硅陶瓷板、碳化硅陶瓷方梁等,其结构强度较低,急需高强度的碳纤维-陶瓷复合材料替代。
发明内容
本发明的目的在于提供一种能克服上述缺陷、实现低成本高效制备碳化硅膜连续碳纤维束的制备方法。其技术方案为:
连续碳纤维束是在碳化硅膜连续碳纤维束镀膜机中通入工艺气体在被加热的碳纤维束表面连续沉积碳化硅制成碳化硅膜连续碳纤维束,其中,碳化硅膜连续碳纤维束镀膜机是由碳纤维室(1)、气相沉积室(2)、混合气体室(3)、氮气室(4)、碳化硅膜连续碳纤维束载物平台(5)、碳纤维滚(6)、碳纤维束(7)、通道(8)、对棍石墨滚(9)、对棍石墨滚(10)、通道(11)、通道(12)、通道(13)、切刀(14)、气体入口(15)、排出口(16)、进口(17)、气相沉积室隔热屏(18)组成的;
对棍石墨滚(9)和对棍石墨滚(10)分别与电源的两极相接,通电后将碳纤维束加热到900~1100℃,对棍石墨滚(9)和对棍石墨滚(10)的转速协调一致;
工艺气体为三氯甲基硅烷气、氢气和氩气的混合气体,三氯甲基硅烷气:氢气:氩气的摩尔比为1:6~10:8~12,流量控制在100~1200ml/min;
碳化硅膜连续碳纤维束中碳化硅膜的厚度是由工艺气体的摩尔比、碳纤维束(7)的温度和对棍石墨滚(9)(10)的转速共同控制。
本发明与现有技术相比,其优点为:
1、本发明是采用碳化硅膜连续碳纤维束镀膜机,通入工艺气体在被加热的碳纤维束表面连续沉积碳化硅制成碳化硅膜连续碳纤维束,碳化硅膜连续碳纤维束和碳化硅膜的厚度可以随机任意选择,生产效率高;
2、由于本发明是直接加热碳纤维束,高温裂解生成的碳化硅绝大部分沉积在碳纤维束的表面,极少部分沉积在隔热屏上,不但节省原材料、节能且生产效率高。
附图说明
图1是本发明所使用的碳化硅膜连续碳纤维束镀膜机结构示意图:
1.碳纤维室,2.气相沉积室,3.混合气体室,4.氮气室,5.碳化硅膜连续碳纤维束载物平台,6.碳纤维滚,7.碳纤维束,8.通道,9.对棍石墨滚,10.对棍石墨滚,11.通道,12.通道,13.通道,14.切刀,15.气体入口,16.排出口,17.进口,18.气相沉积室隔热屏。
具体实施方式
碳化硅膜连续碳纤维束镀膜机是由5主要部分组成的,包括:碳纤维室1;气相沉积室2;混合气体室3;氮气室4;碳化硅膜连续碳纤维束载物平台5;
工作时,碳纤维滚6释放碳纤维束7,通过通道8进入气相沉积室2,经过两组接入电极的对棍石墨滚9和10被加热后在连续碳纤维束表面沉积碳化硅薄膜,对棍石墨滚(9)和对棍石墨滚(10)的转速协调一致,然后通过通道11进入混合气体室3,再通过通道12进入氮气室4,再通过通道13到碳化硅膜连续达碳纤维束载物平台5,经切刀14切割制成规定长度的碳化硅膜连续碳纤维束,并置于碳化硅膜连续碳纤维束载物平台5上收集包装;
气相沉积工作气体是通过气体入口15进入并充满气相沉积室2,在被加热的碳纤维束表面裂解生成碳化硅同时沉积在其表面,过剩气体通过通道11进入混合气体室3,然后从排出口16排出;
氮气从进口17进入氮气室4,从通道12和13排出,通过调整氮气压力阻止混合气体和空气分别从通道12和13进入氮气室4。
实施例1
T33碳纤维束加热到1100℃;
三氯甲基硅烷气:氢气:氩气的摩尔比为1:6:8,流量控制在1200ml/min;
对棍石墨滚(9)(10)的转速的线速度为2cm/ min;
碳化硅膜厚度为9.1µm。
实施例2
T300碳纤维束加热到1000℃;
三氯甲基硅烷气:氢气:氩气的摩尔比为1:8:10,流量控制在600ml/min;
对棍石墨滚(9)(10)的转速的线速度为0.6cm/ min;
碳化硅膜厚度为5.3µm。
实施例3
T300碳纤维束加热到900℃;
三氯甲基硅烷气:氢气:氩气的摩尔比为1: 10: 12,流量控制在100ml/min;
对棍石墨滚(9)(10)的转速的线速度为0.8cm/ min;
碳化硅膜厚度为1.6µm。
Claims (1)
1.一种碳化硅膜连续碳纤维束的制备方法,其特征在于,连续碳纤维束是在碳化硅膜连续碳纤维束镀膜机中通入工艺气体在被加热的碳纤维束表面连续沉积碳化硅制成碳化硅膜连续碳纤维束,其中,碳化硅膜连续碳纤维束镀膜机是由碳纤维室(1)、气相沉积室(2)、混合气体室(3)、氮气室(4)、碳化硅膜连续碳纤维束载物平台(5)、碳纤维滚(6)、碳纤维束(7)、通道(8)、对棍石墨滚(9)、对棍石墨滚(10)、通道(11)、通道(12)、通道(13)、切刀(14)、气体入口(15)、排出口(16)、进口(17)、气相沉积室隔热屏(18)组成的;
对棍石墨滚(9)和对棍石墨滚(10)分别与电源的两极相接,通电后将碳纤维束加热到900~1100℃,对棍石墨滚(9)和对棍石墨滚(10)的转速协调一致;
工艺气体为三氯甲基硅烷气、氢气和氩气的混合气体,三氯甲基硅烷气:氢气:氩气的摩尔比为1:6~10:8~12,流量控制在100~1200ml/min;
碳化硅膜连续碳纤维束中碳化硅膜的厚度是由工艺气体的摩尔比、碳纤维束(7)的温度和对棍石墨滚(9)(10)的转速共同控制。
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US5041305A (en) * | 1989-05-04 | 1991-08-20 | The British Petroleum Company P.L.C. | Process for depositing a silicon carbide coating on a filament |
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Patent Citations (8)
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US4068037A (en) * | 1976-01-02 | 1978-01-10 | Avco Corporation | Silicon carbide filaments and method |
US4373006A (en) * | 1979-08-09 | 1983-02-08 | United Technologies Corporation | Silicon carbide coated carbon fibers and composites |
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US5041305A (en) * | 1989-05-04 | 1991-08-20 | The British Petroleum Company P.L.C. | Process for depositing a silicon carbide coating on a filament |
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