JPH038769A - Production of carbon fiber-reinforced carbonaceous material - Google Patents
Production of carbon fiber-reinforced carbonaceous materialInfo
- Publication number
- JPH038769A JPH038769A JP1139143A JP13914389A JPH038769A JP H038769 A JPH038769 A JP H038769A JP 1139143 A JP1139143 A JP 1139143A JP 13914389 A JP13914389 A JP 13914389A JP H038769 A JPH038769 A JP H038769A
- Authority
- JP
- Japan
- Prior art keywords
- carbon fiber
- carbon
- carbonaceous filler
- paste
- reinforced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 20
- 239000003575 carbonaceous material Substances 0.000 title claims description 20
- 229910052799 carbon Inorganic materials 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 34
- 239000004917 carbon fiber Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000002612 dispersion medium Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000010000 carbonizing Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 16
- 238000001125 extrusion Methods 0.000 abstract description 10
- 238000004898 kneading Methods 0.000 abstract description 7
- 239000011280 coal tar Substances 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 238000005087 graphitization Methods 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- 238000003763 carbonization Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011294 coal tar pitch Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000007770 graphite material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical class CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical class CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000011301 petroleum pitch Substances 0.000 description 2
- 239000006253 pitch coke Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 octanes Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、炭素繊維強化炭素材料の製造方法に関するも
のである。詳しく述べると、耐摩耗性の良好な炭素繊維
強化炭素材料を生産性よく製造する方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a carbon fiber reinforced carbon material. Specifically, the present invention relates to a method for manufacturing a carbon fiber reinforced carbon material with good wear resistance with good productivity.
（従来の技術）
炭素繊維強化炭素材料は、軽量（比重１．５〜２、 ０
ｇ／ｃｃ）で、耐熱温度が２，５００〜３゜０００℃と
いうように著しく優れている他に、高温における機械的
性質、耐熱衝撃性、寸法安定性等の熱的安定性に優れて
いる。炭素繊維強化炭素材料は、このような特徴から高
温にさらされる部品に用いられる材料として有用であり
、例えば、ブレーキング時の表面温度が５００〜１．
０００℃になる航空機のディスクブレーキに用いられて
おり、また、今後は大型自動車用や高速鉄道車両用のブ
レーキ材料としての用途の拡大も期待されている。また
、該炭素繊維強化炭素材料は、等方性黒鉛材料の代替材
料としても有望である。等方性黒鉛材料は、電気炉の内
壁材料、発熱体やシリコン半導体引き上げ用るつぼ、焼
成用の黒鉛るつぼ、黒鉛ボート等耐熱性を要求される用
途に使用されている。ここに、高い強度を有する炭素繊
維強化炭素材料を使用すれば、従来の材料よりも少ない
量で必要な強度を持たせることができ、そのため使用量
を低減させることができるので、価格次第で充分代替可
能である。(Prior art) Carbon fiber-reinforced carbon materials are lightweight (specific gravity 1.5-2, 0
g/cc), and has an extremely high heat resistance temperature of 2,500 to 3,000℃, as well as excellent thermal stability such as mechanical properties, thermal shock resistance, and dimensional stability at high temperatures. . Due to these characteristics, carbon fiber reinforced carbon materials are useful as materials for parts that are exposed to high temperatures, for example, when the surface temperature during braking is 500 to 1.
It is used in aircraft disc brakes, which can reach temperatures of 1,000 degrees Celsius, and is expected to be used more widely in the future as a brake material for large automobiles and high-speed railway vehicles. The carbon fiber reinforced carbon material is also promising as a substitute for isotropic graphite materials. Isotropic graphite materials are used in applications that require heat resistance, such as inner wall materials for electric furnaces, heating elements, crucibles for pulling silicon semiconductors, graphite crucibles for firing, and graphite boats. If carbon fiber-reinforced carbon materials with high strength are used, the required strength can be achieved with a smaller amount than conventional materials, and therefore the amount used can be reduced, so it is sufficient depending on the price. Substitutable.
この炭素繊維強化炭素材料は、予め炭素繊維に樹脂、ピ
ッチ等の有機物のマトリックス前駆体を含浸または塗布
しておき、成形しかつ硬化したのち、炭化ないし黒鉛化
させる樹脂含浸法、炭素繊維や炭素繊維織物の繊維間に
直接熱分解炭素を充填させる化学気相蒸着法（ＣＶＤ法
）等の方法によって製造されている［炭素、１９８３年
（Ｎｏ、Ｌｆ５）第１９６〜２０８頁］。This carbon fiber-reinforced carbon material is produced using a resin impregnation method in which carbon fibers are pre-impregnated or coated with an organic matrix precursor such as resin or pitch, molded and cured, and then carbonized or graphitized. It is manufactured by a method such as a chemical vapor deposition method (CVD method) in which pyrolytic carbon is directly filled between the fibers of a fiber fabric [Carbon, 1983 (No. Lf5), pp. 196-208].
（発明が解決しようとする課題）
このように優れた特性を数多く有している炭素繊維強化
炭素材料であるが、現在量も安価な航空機用ブレーキで
もその価格は未だ極めて高い。このような高価格のため
に、航空宇宙機器用材料やブレーキ材料のような限定さ
れた用途にしか利用されていないのが現状である。炭素
繊維強化炭素材料が高価である理由としては、原料とし
て高価な炭素繊維の織布や炭素繊維の長繊維を使用して
いること、賦形もプレス成形法で成形したりあるいは炭
素繊維を三次元織りして賦形する等生産効率の悪い方法
をとっていること、場合によっては処理コストの高いＣ
ＶＤ処理を必要とすること等が挙げられる。(Problems to be Solved by the Invention) Carbon fiber-reinforced carbon materials have many excellent properties as described above, but their prices are still extremely high even for aircraft brakes, which are currently available and inexpensive. Due to such a high price, it is currently only used for limited applications such as materials for aerospace equipment and brake materials. The reason why carbon fiber-reinforced carbon materials are expensive is that they use expensive carbon fiber woven cloth or carbon fiber long fibers as raw materials, and that they are shaped by press molding or tertiary carbon fiber. Inefficient production methods such as original weaving and shaping, and in some cases high processing costs
For example, it requires VD processing.
そこで、原料として安価な炭素繊維の短ｕ＆錐を使用し
、成形法として黒鉛電極や等方性黒鉛材料の大量生産に
使用されている押出成形法を利用することにより、従来
法よりも安価な炭素繊維強化炭素材を製造することが考
えられる。この押出成形法で炭素繊維強化炭素材料を製
造する場合には、繊維容ｆｆｌ （Ｖ、 ）が太き（な
ると、混練後のペーストを押出成形するときに成形体に
クラックが生成したり、あるいは成形体が割れたりする
という問題があった。Therefore, by using cheap carbon fiber short U & cone as raw materials and extrusion molding method used for mass production of graphite electrodes and isotropic graphite materials, we have developed a method that is cheaper than conventional methods. It is conceivable to manufacture a carbon fiber reinforced carbon material. When producing a carbon fiber-reinforced carbon material using this extrusion method, the fiber volume ffl (V, ) is thick (if this happens, cracks may occur in the molded product when the paste after kneading is extruded, or There was a problem that the molded product could crack.
したがって、本発明の目的は、炭素ｗｃ維強化炭素材料
の新規な製造方法を提供することにある。Therefore, an object of the present invention is to provide a novel method for producing carbon WC fiber-reinforced carbon materials.
本発明の他の目的は、安価な炭素繊維の短繊維を原料と
して用いて炭素繊維強化炭素材料の製造方法を提供する
ことにある。本発明のさらに他の目的は、Ｖｒの高い炭
素繊維強化炭素材料の製造方法を提供することにある。Another object of the present invention is to provide a method for producing a carbon fiber-reinforced carbon material using inexpensive short carbon fibers as a raw material. Still another object of the present invention is to provide a method for producing a carbon fiber-reinforced carbon material with high Vr.
（課題を解決するための手段）
これらの諸口的は、炭素質フィラーと炭素（裁維の短繊
維とを液状分散媒中に分散混合させたのち、得れたスラ
リーを濾過して炭素質フィラーと炭素）ａ維とのケーキ
を得、該ケーキに粘結材を配合して得られるペーストを
押出成形し、ついで該成形物を炭化ないし黒鉛化するこ
とを特徴とする炭化繊維強化材料の製造方法により達成
される。(Means for solving the problem) These various methods include dispersing and mixing carbonaceous filler and carbon (short fibers of cut fibers) in a liquid dispersion medium, and then filtering the obtained slurry to obtain carbonaceous filler. and carbon) a fiber, extrusion molding a paste obtained by blending a caking agent into the cake, and then carbonizing or graphitizing the molded product. This is accomplished by a method.
以下、本発明について詳細に説明する。The present invention will be explained in detail below.
本発明において用いられる炭素繊維は、繊維長（Ｌ）が
０．５〜１００關、好ましくは５〜５０ｍｍで、繊維径
（Ｄ）が３〜３０μｍ程度で、Ｌ／Ｄが２０以上、特に
１００〜１０．０００である短繊維が好ましい。炭素繊
維の原料については特に制限はなく、ピッチ、アクリロ
ニトリル等、いずれを原料としたものでもよいが、好ま
しくはピッチ系である。The carbon fibers used in the present invention have a fiber length (L) of about 0.5 to 100 mm, preferably 5 to 50 mm, a fiber diameter (D) of about 3 to 30 μm, and an L/D of 20 or more, especially 100 mm. ~10.000 short fibers are preferred. There is no particular restriction on the raw material for the carbon fibers, and they may be made from pitch, acrylonitrile, or the like, but pitch-based materials are preferred.
炭素質フィラーとしては、ピッチコークス、石油コーク
ス、無煙炭、黒鉛、カーボンブラック等が挙げられ、こ
れらは平均粒径０．５ｍｍ以下に粉砕して得られる粒状
物が好ましい。炭素質フィラーは、炭素繊維１００重旦
部当り２０〜１００重量部、好ましくは５０〜２００重
量部配合される。Examples of the carbonaceous filler include pitch coke, petroleum coke, anthracite, graphite, and carbon black, and granules obtained by pulverizing these to an average particle size of 0.5 mm or less are preferable. The carbonaceous filler is blended in an amount of 20 to 100 parts by weight, preferably 50 to 200 parts by weight, per 100 parts by weight of carbon fiber.
この炭素質フィラーと炭素繊維とは、液状分散媒中に分
散混合される。分散媒としては、水やベンゼン、トルエ
ン、キシレン、タール系軽油、洗浄油、カルポル油、ヘ
キサン類、ヘプタン類、オクタン類、灯油、石油系軽油
等の炭化水素類、その他の有機溶剤等がある。前記炭素
質フィラーと炭素繊維との合計量の液状分散媒に対する
濃度は濾過のし易さ、分散のし易さ等から１０重量％以
下とするのがよい。分散混合は、通常の撹拌操作で、炭
素繊維が解繊されて、該繊維がばらばらに解きほぐされ
るまで行なわれる。炭素質フィラーと炭素繊維とが液状
分散媒中で充分分散混合されると、スラリーが得られる
。このスラリーを濾過して液状分散媒を濾別すると、ケ
ーキ状物が得られる。このケーキは、必要によりさらに
遠心分離、熱風乾燥等に供して脱水される。The carbonaceous filler and carbon fibers are dispersed and mixed in a liquid dispersion medium. Dispersion media include water, benzene, toluene, xylene, tar-based light oil, cleaning oil, carpol oil, hexanes, heptanes, octanes, kerosene, hydrocarbons such as petroleum light oil, and other organic solvents. . The concentration of the total amount of the carbonaceous filler and carbon fibers relative to the liquid dispersion medium is preferably 10% by weight or less from the viewpoint of ease of filtration and dispersion. Dispersion mixing is performed by a normal stirring operation until the carbon fibers are defibrated and loosened into pieces. When the carbonaceous filler and carbon fibers are sufficiently dispersed and mixed in a liquid dispersion medium, a slurry is obtained. When this slurry is filtered to remove the liquid dispersion medium, a cake-like product is obtained. This cake is further dehydrated by centrifugation, hot air drying, etc., if necessary.
つぎに、このケーキに粘結材を加えてニーダ−等の混練
機で混練することによりペースト状物が得られる。粘結
材としては、コールタール、石油タール、コールタール
ピッチ、石油系ピッチ、樹脂、例えばフェノール樹脂、
フラン樹脂等の熱硬化性樹脂等が挙げられる。この粘結
祠は、前記炭素繊維１００重量部当り１０〜１，０００
重量部、好ましくは５０〜２００重量部配合される。Next, a paste is obtained by adding a caking agent to this cake and kneading it with a kneader such as a kneader. As the caking agent, coal tar, petroleum tar, coal tar pitch, petroleum pitch, resin such as phenol resin,
Examples include thermosetting resins such as furan resins. This caking powder is 10 to 1,000 per 100 parts by weight of the carbon fiber.
It is blended in an amount of 50 to 200 parts by weight, preferably 50 to 200 parts by weight.
このペースト状物を、押出成形法により成形すると、炭
素繊維が均一に分散した成形体が得られる。この成形体
を炭化するか、あるいは必要に応じて黒鉛化するこ゛と
により炭素繊維が均一に分散した炭素繊維強化炭素材料
が得られる。炭化は非酸化性雰囲気、例えば窒素、アル
ゴン、ヘリウム、炭酸ガス等の不活性ガス雰囲気中で４
５０〜１゜１００℃の温度範囲で徐々に加熱して行われ
る。When this paste-like material is molded by extrusion molding, a molded article in which carbon fibers are uniformly dispersed can be obtained. By carbonizing this compact or, if necessary, graphitizing it, a carbon fiber-reinforced carbon material in which carbon fibers are uniformly dispersed can be obtained. Carbonization is carried out in a non-oxidizing atmosphere, such as an inert gas atmosphere such as nitrogen, argon, helium, carbon dioxide, etc.
It is carried out by gradually heating in a temperature range of 50 to 1 to 100 degrees Celsius.
また、黒鉛化は、同様に非酸化性雰囲気中で１゜８００
〜２．８００℃の温度範囲で徐々に加熱して行われる。Graphitization is also carried out at 1°800 in a non-oxidizing atmosphere.
It is carried out by gradual heating in the temperature range of ~2.800°C.
得られた炭素繊維強化炭素材料の密度、強度等が低けれ
ば、通常の炭素祠料の製造方法と同様に、含浸炭化、Ｃ
ＶＤ等操作を行なって高密度化、高強度化等を行なって
もよい。含浸炭化は、例えば、減圧下にコールタール、
石油タール、コールタールピッチ、石油系ピッチ、熱可
塑性樹脂等を含浸させたのち、前記条件下に炭化するこ
とにより行なわれ、１回ないし複数回行なわれる。If the density, strength, etc. of the obtained carbon fiber reinforced carbon material are low, impregnation carbonization, C
It is also possible to increase the density, increase the strength, etc. by performing operations such as VD. Impregnation carbonization is, for example, coal tar under reduced pressure,
This is carried out by impregnating petroleum tar, coal tar pitch, petroleum pitch, thermoplastic resin, etc., and then carbonizing it under the above conditions, and is carried out once or multiple times.
以上の方法により、炭素繊維の短繊維が均一に分散した
炭素繊維強化炭素材料が得られる。また、本発明方法で
は、混練前に炭素繊維の短繊維と炭素質フィラーとを液
状分散媒中に均一に混合するので、従来方法における混
練時に炭素繊維が塊状に固り、これにより成形時にクラ
ックや割れが発生するという問題が解決した。また、Ｖ
ｒやニーダ−の混練特性によっては、混練後のペースト
中に炭素繊維が均一に分散していない場合がある。By the above method, a carbon fiber-reinforced carbon material in which short carbon fibers are uniformly dispersed can be obtained. In addition, in the method of the present invention, short carbon fibers and carbonaceous filler are uniformly mixed in a liquid dispersion medium before kneading, so the carbon fibers harden into lumps during kneading in the conventional method, which causes cracks during molding. The problem of cracking and cracking has been solved. Also, V
Depending on the kneading characteristics of the r and the kneader, the carbon fibers may not be uniformly dispersed in the paste after kneading.
この場合は、ペースト状物を一度予備成形したのち、粉
砕し、再度ニーダ−等の混練機で混練し、ついで、押出
成形法等により成形することにより、炭素繊維が均一に
分散した成形体が得られる。この場合の予備成形は、必
ずしも押出成形法で行なう必要はなく、プレス成形等の
他の成形法でもよい。In this case, the paste-like material is first preformed, then pulverized, kneaded again with a kneader or other kneader, and then molded using an extrusion method, etc., to create a molded product in which carbon fibers are uniformly dispersed. can get. Preforming in this case does not necessarily have to be carried out by extrusion molding, and other molding methods such as press molding may be used.
（実施例）
つぎに、実施例を挙げて本発明をさらに詳細に説明する
。なお、下記実施例における「部」および「％」は、特
にことわらない限り重量による。(Example) Next, the present invention will be described in further detail by giving examples. In addition, "part" and "%" in the following examples are based on weight unless otherwise specified.
実施例１
コールタールピッチ系の炭素繊維（長さ３ｍｍ）５０部
とピッチコークス（標準篩６０メツシユ）５０部とを水
１，０００部に加えて、攪拌機で混合し、スラリーを得
た。このスラリーを６０メツシユの金網で濾過するとと
もに濾液は金網で繰返し循環した。得られたケーキを遠
心分離機により脱水したのち、ニーダ−に供給し、これ
に粘結材としてコールタールピッチ１００部を加えて混
練し、ペースト状物を得た。このペースト状物を押出成
形機を用いて成形し、直径２０ｍｍ、長さ１００ｍｍの
円柱状成形体を得た。この成形体の嵩密度は１ 、 ６
８ ｇ ／ ０ｍ３、Ｖ ｆは２９．３％であった。Example 1 50 parts of coal tar pitch-based carbon fibers (length 3 mm) and 50 parts of pitch coke (60 mesh standard sieve) were added to 1,000 parts of water and mixed with a stirrer to obtain a slurry. This slurry was filtered through a 60-mesh wire mesh, and the filtrate was repeatedly circulated through the wire mesh. The resulting cake was dehydrated using a centrifugal separator and then fed into a kneader, and 100 parts of coal tar pitch was added thereto as a caking agent and kneaded to obtain a paste. This paste-like material was molded using an extrusion molding machine to obtain a cylindrical molded product with a diameter of 20 mm and a length of 100 mm. The bulk density of this molded body is 1, 6
8 g/0 m3, V f was 29.3%.
この成形体を電気炉に入れ、窒素ガス雰囲気下に１．１
００°Ｃまで昇温しで炭化を行なった。炭化後の嵩密度
は１．５３ｇ／ｃｍ３であった。つぎに含浸炭化操作を
３回行ったのち、アルゴンガス雰囲気下で２，０００°
Ｃまで昇温しで黒鉛化を行なった。得らた黒鉛化材料に
ついての物性は、第１表のとおりであった。なお、曲げ
強度およびヤング率は、押出軸方向に長手方向とする試
験片で測定した。熱伝導率は押出軸方向のもので、レー
ザーフラッシュ法で測定した。つぎに、摩擦係数を測定
するとともに、ステータ／ロータ方式でブレーキテスト
（摩耗量）を測定した。その結果を第２表に示す。This molded body was placed in an electric furnace and heated for 1.1 hours under a nitrogen gas atmosphere.
Carbonization was carried out by raising the temperature to 00°C. The bulk density after carbonization was 1.53 g/cm3. Next, after performing the impregnation carbonization operation three times, the temperature was set at 2,000° under an argon gas atmosphere.
Graphitization was performed by raising the temperature to C. The physical properties of the graphitized material obtained were as shown in Table 1. The bending strength and Young's modulus were measured using a test piece whose longitudinal direction was in the extrusion axis direction. Thermal conductivity was measured in the extrusion axis direction using a laser flash method. Next, the friction coefficient was measured, and a brake test (amount of wear) was also measured using a stator/rotor method. The results are shown in Table 2.
比較のために、市販のブレーキ材料（炭素繊維織布を積
層したのち、ＣＶＤ処理を行なったもの）についても同
じ方式で試験した。その結果を第２表に示す。For comparison, a commercially available brake material (carbon fiber woven fabric laminated and then CVD treated) was also tested in the same manner. The results are shown in Table 2.
第１表
試験項目
嵩密度（ｇ／ ｃｍ３）
曲げ強度（Ｋｇｆ／ ｍｍ２）
ヤング率（Ｋｇｆ／ ｍｍ２）
熱伝導率（Ｗｌｍ−Ｋ）
実施例１
１．９３
１３．８
１．２４０
４
第２表
とが可能となる。また、本発明方法により得られる炭素
繊維強化炭素材料は、耐摩耗性が極めて高いので、ディ
スクブレーキ等の材料として極めて有用である。Table 1 Test items Bulk density (g/cm3) Bending strength (Kgf/mm2) Young's modulus (Kgf/mm2) Thermal conductivity (Wlm-K) Example 1 1.93 13.8 1.240 4 Table 2 becomes possible. Furthermore, the carbon fiber-reinforced carbon material obtained by the method of the present invention has extremely high wear resistance and is therefore extremely useful as a material for disc brakes and the like.
Claims (1)
媒中に分散混合させたのち、得られたスラリーを濾過し
て炭素質フィラーと炭素繊維とのケーキを得、該ケーキ
に粘結材を配合して得られるペーストを押出成形し、つ
いで該成形物を炭化ないし黒鉛化することを特徴とする
炭素繊維強化炭素材料の製造方法。(1) After dispersing and mixing the carbonaceous filler and short carbon fibers in a liquid dispersion medium, the resulting slurry is filtered to obtain a cake of the carbonaceous filler and carbon fibers, and the cake is caked. A method for producing a carbon fiber-reinforced carbon material, which comprises extruding a paste obtained by blending materials, and then carbonizing or graphitizing the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1139143A JPH038769A (en) | 1989-06-02 | 1989-06-02 | Production of carbon fiber-reinforced carbonaceous material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1139143A JPH038769A (en) | 1989-06-02 | 1989-06-02 | Production of carbon fiber-reinforced carbonaceous material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH038769A true JPH038769A (en) | 1991-01-16 |
Family
ID=15238563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1139143A Pending JPH038769A (en) | 1989-06-02 | 1989-06-02 | Production of carbon fiber-reinforced carbonaceous material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH038769A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014104010A1 (en) * | 2012-12-26 | 2014-07-03 | 三菱鉛筆株式会社 | Carbon-based composite material, and method for producing same |
| JP2015160749A (en) * | 2014-02-26 | 2015-09-07 | Ｊｆｅスチール株式会社 | Method of producing magnesia-carbon brick and magnesia-carbon brick |
-
1989
- 1989-06-02 JP JP1139143A patent/JPH038769A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014104010A1 (en) * | 2012-12-26 | 2014-07-03 | 三菱鉛筆株式会社 | Carbon-based composite material, and method for producing same |
| JP2014141391A (en) * | 2012-12-26 | 2014-08-07 | Mitsubishi Pencil Co Ltd | Carbon based composite material and method for producing the same |
| JP2015160749A (en) * | 2014-02-26 | 2015-09-07 | Ｊｆｅスチール株式会社 | Method of producing magnesia-carbon brick and magnesia-carbon brick |
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