JP2000001377A - Carbon composite material structural body - Google Patents
Carbon composite material structural bodyInfo
- Publication number
- JP2000001377A JP2000001377A JP10163396A JP16339698A JP2000001377A JP 2000001377 A JP2000001377 A JP 2000001377A JP 10163396 A JP10163396 A JP 10163396A JP 16339698 A JP16339698 A JP 16339698A JP 2000001377 A JP2000001377 A JP 2000001377A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- composite material
- carbon fiber
- carbon composite
- layer cylindrical
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セラミックス、金
属の焼結工程で使用する高耐久性のダイス等に用いうる
炭素繊維強化炭素複合材構造物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon fiber reinforced carbon composite material structure which can be used for a highly durable die used in a sintering process of ceramics and metals.
【０００２】[0002]
【従来の技術】フェノール樹脂などを焼成して形成され
る炭素質材料は通常の黒鉛素材に比べ比重が小さく、機
械的強度に優れていることから構造部材やその他の分野
で広く利用されている。一例を挙げれば、その高強度な
機械的特性を活かして、セラミックス、金属を焼結する
ホットプレス機の内圧防御治具のダイスとして使用され
ている。2. Description of the Related Art Carbonaceous materials formed by baking phenolic resin and the like are widely used in structural members and other fields because of their lower specific gravity and better mechanical strength than ordinary graphite materials. . For example, by utilizing its high-strength mechanical properties, it is used as a die for an internal pressure protection jig of a hot press machine for sintering ceramics and metals.
【０００３】図２は汎用のホットプレス機の構成を示す
概略図である。通常、ホットプレス機２０を使用してセ
ラミックスを焼結する場合、黒鉛モールド２２の外側に
ダイス２４をセットし、モールド内の上下２枚のスペー
サー２６、２８の間に粉体を充填し、焼結を促進させる
ためパンチ３０、３２で高加圧し、２０００℃以上に加
熱する。その為、薄いセラミックス焼結体を製作する場
合に於いては、くさび効果により、黒鉛モールド２２が
破壊され、さらにダイス２４まで破壊が進行することが
ある。FIG. 2 is a schematic diagram showing a configuration of a general-purpose hot press machine. Normally, when sintering ceramics using the hot press machine 20, a die 24 is set outside the graphite mold 22, powder is filled between the upper and lower two spacers 26 and 28 in the mold, and the firing is performed. High pressure is applied by punches 30 and 32 in order to promote sintering, and heating is performed to 2000 ° C. or more. Therefore, in the case of manufacturing a thin ceramic sintered body, the graphite mold 22 may be destroyed by the wedge effect, and further the fracture may progress to the die 24.
【０００４】炭素質材料で形成されるダイス２４は一般
に黒鉛モールド２２に比べ高価であるため、その代替材
料が要望され黒鉛に比べ数倍の機械的強度を持つ炭素繊
維強化炭素材を使用したダイスが普及しつつある。Since the die 24 formed of a carbonaceous material is generally more expensive than the graphite mold 22, a substitute material is required, and a die using a carbon fiber reinforced carbon material having several times the mechanical strength of graphite is required. Is spreading.
【０００５】炭素繊維強化炭素材を使用したダイスは、
フェノール樹脂、フラン樹脂、アクリル樹脂等の加熱に
より炭素質材料となる熱硬化性樹脂を有機溶媒に溶解し
たものをバインダーとして、炭素長繊維を所望の直径を
有する金属円筒に所望の幅、厚みに巻き付け、熱硬化さ
せた後、金属円筒を抜き取って円筒形の硬化体を形成し
た後、この円筒形の硬化体を真空あるいは不活性雰囲気
下１０００℃以上で焼成し、さらに前記熱硬化樹脂に含
浸し、焼成することを数回繰り返すことにより得られ
る。A die using carbon fiber reinforced carbon material is:
A phenol resin, a furan resin, a thermosetting resin which becomes a carbonaceous material by heating such as an acrylic resin dissolved in an organic solvent as a binder, and carbon long fibers are formed into a metal cylinder having a desired diameter to a desired width and thickness. After winding and thermosetting, the metal cylinder is pulled out to form a cylindrical hardened body, and then the cylindrical hardened body is fired at 1000 ° C. or higher in a vacuum or an inert atmosphere, and further impregnated in the thermosetting resin. It is obtained by repeating firing several times.
【０００６】現在用いられる炭素質材料製ダイスにおい
ては、炭素長繊維を円筒形に対して円周方向にパラレル
状に巻いたものを硬化させている。このため炭素長繊維
は円筒形の円周方向のみに配向し、周方向の内圧を受け
ると炭素繊維相互間に剥離が生じ、寿命が短いという欠
点があった。さらに、内圧による加圧頻度が多いダイス
中央部は外周部方向に変形し、それに伴って、当該部分
に位置する黒鉛モールドをも破壊させるという問題も生
じていた。[0006] In a carbonaceous material die used at present, a carbon long fiber wound in parallel with a cylindrical shape in a circumferential direction is hardened. For this reason, the long carbon fibers are oriented only in the circumferential direction of the cylinder, and when subjected to an internal pressure in the circumferential direction, the carbon fibers are separated from each other, resulting in a short life. Furthermore, the central part of the die, which is frequently pressurized by the internal pressure, is deformed in the direction of the outer peripheral part, and accordingly, there is a problem that the graphite mold located in the part is also destroyed.
【０００７】例えば、外径４５０ｍｍで、２３５０℃
で、厚み５０ｍｍの条件で使用した場合、その引張り破
壊応力は１５６０ｋｇ／ｃｍ2 であり、この時のダイス
にかかる側圧は厚み２５ｍｍの製品を焼成しようとする
場合、４２６ｋｇ／ｃｍ2 となる。ここで、ダイスにか
かる側圧［最大引張応力σmax （ｋｇ／ｃｍ2 ）］は、
肉厚円筒における側圧の計算式に係数を掛けた以下の式
を用いて算出することができる。For example, at an outer diameter of 450 mm and 2350 ° C.
In, when used under the conditions of the thickness of 50mm, the tensile fracture stress is 1560kg / cm 2, lateral pressure according to the time of the dice if you try to firing the product of the thickness of 25mm, the 426kg / cm 2. Here, the lateral pressure applied to the die [maximum tensile stress σ max (kg / cm 2 )] is
It can be calculated using the following equation obtained by multiplying the equation for calculating the lateral pressure in the thick cylinder by a coefficient.
【０００８】[0008]
【数１】 式中、Ｄはダイス外径、ｄはダイス内径、Ｌは試料のダ
イス内における加圧焼結後の最終高さを、Ｈはダイス内
に充填した試料の初期高さを、ｆは側圧比、ここでは１
を、ｐは押圧（ｋｇ／ｃｍ2 ）を表す。(Equation 1) In the formula, D is the outer diameter of the die, d is the inner diameter of the die, L is the final height of the sample in the die after pressure sintering, H is the initial height of the sample filled in the die, and f is the side pressure ratio. , Here 1
And p represents pressure (kg / cm 2 ).
【０００９】この最大引張応力σmax ４２６ｋｇ／ｃ
ｍ2 の値は、単純に破壊応力と比較すると問題はない
が、もし、内面が数ｍｍ変形していると、発生応力は１
００００ｋｇ／ｃｍ2 以上となり、まず、ダイスを形成
している複合材料中の繊維間の剥離が生じ、ダイスの破
壊を招くことになる。The maximum tensile stress σ max 426 kg / c
Although there is no problem when the value of m 2 is simply compared with the fracture stress, if the inner surface is deformed by several mm, the generated stress becomes 1
At least 0000 kg / cm 2 , first, separation between the fibers in the composite material forming the dice occurs, which results in destruction of the dice.
【００１０】これらの問題を防ぐため、ダイスやモール
ドの厚みを厚くする方法があるが、この方法ではホット
プレスに用いる加熱炉が大きくなり、ヒーター容量の増
大、真空系、冷却系が増大となり設備コスト的に負担が
大きくなる。In order to prevent these problems, there is a method of increasing the thickness of a die or a mold. However, in this method, a heating furnace used for a hot press is increased, and a heater capacity is increased, and a vacuum system and a cooling system are increased. The burden increases in cost.
【００１１】[0011]
【発明が解決しようとする課題】本発明の目的は、薄い
セラミックス焼結体をホットプレスにより製造する際に
も長期間使用可能な、耐久性に優れた構造体、即ち、ホ
ットプレス用ダイス、プッシャー式連続炉のプッシャー
棒等の剪断力の付加がかかる部材にも適用可能な、高温
高圧の過酷な条件下でも高い耐久性を有する炭素繊維強
化炭素複合材構造物を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a durable structure which can be used for a long time even when a thin ceramic sintered body is manufactured by hot pressing, that is, a die for hot pressing. An object of the present invention is to provide a carbon fiber reinforced carbon composite material structure that can be applied to a member to which a shear force is applied, such as a pusher rod of a pusher type continuous furnace, and has high durability even under severe conditions of high temperature and high pressure.
【００１２】[0012]
【課題を解決するための手段】本発明者らは、鋭意検討
の結果、構造物を二層円筒構造とし、それぞれの構造体
に配置する炭素繊維の配向性を制御することにより、前
記目的を達成しうることを見いだして本発明を完成し
た。Means for Solving the Problems As a result of diligent studies, the present inventors have made the structure a two-layer cylindrical structure and controlled the orientation of carbon fibers arranged in each structure, thereby achieving the above object. The present invention has been completed by finding what can be achieved.
【００１３】即ち、本発明の炭素複合材構造物は、二層
円筒構造を有する炭素複合材構造物であって、該二層円
筒構造が、炭素質マトリックス中に炭素繊維が内層円筒
の径方向に対して５〜２０°の範囲にあるようなヘリカ
ル巻き角度でヘリカル状に配置された炭素繊維強化炭素
複合材料で形成された内層円筒部と、炭素質マトリック
ス中に炭素繊維が外層円筒の円周にヘリカル状に配置さ
れた炭素繊維強化炭素複合材料で形成された外層円筒部
とからなる、ことを特徴とする。That is, the carbon composite material structure of the present invention is a carbon composite material structure having a two-layer cylindrical structure, wherein the two-layer cylindrical structure is such that carbon fibers are contained in a carbonaceous matrix in the radial direction of the inner cylinder. And an inner layer cylindrical portion formed of a carbon fiber reinforced carbon composite material arranged helically at a helical winding angle in the range of 5 to 20 °, and a carbon fiber in which a carbon fiber has a circular outer layer cylinder. And an outer layer cylindrical portion formed of a carbon fiber reinforced carbon composite material arranged helically around the periphery.
【００１４】これら外層円筒部の内周面と、内層円筒部
の外周面には、好ましくは角度が１〜５°の範囲のテー
パー加工を施すことが、耐久性の観点から好ましい態様
である。It is a preferable aspect from the viewpoint of durability that the inner peripheral surface of the outer cylindrical portion and the outer peripheral surface of the inner cylindrical portion are tapered at an angle of preferably 1 to 5 °.
【００１５】本発明に用いられる炭素質マトリックス中
に炭素繊維が配置された炭素繊維強化炭素複合材料は、
炭素源をバインダーとして、炭素繊維を所望の配向で配
置した複合原料を焼成して得られる材料であることが好
ましい態様である。The carbon fiber reinforced carbon composite material in which carbon fibers are arranged in a carbonaceous matrix used in the present invention is:
In a preferred embodiment, the material is obtained by firing a composite material in which carbon fibers are arranged in a desired orientation using a carbon source as a binder.
【００１６】[0016]
【発明の実施の形態】以下に、本発明をさらに詳細に説
明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.
【００１７】本発明の炭素複合材構造物は、二層円筒構
造を有する炭素複合材構造物であって、炭素繊維を内層
円筒部は円筒の径方向に対して５〜２０°の範囲の角度
を有するヘリカル状に、外層円筒はヘリカル状に配向さ
せたものである。このように、内層円筒と外層円筒のそ
れぞれに内在する補強用炭素繊維の配向を互いに異なる
ものとすることが重要である。The carbon composite material structure according to the present invention is a carbon composite material structure having a two-layer cylindrical structure, wherein the inner layer cylindrical portion has a carbon fiber having an angle of 5 to 20 ° with respect to the radial direction of the cylinder. And the outer cylinder is oriented helically. As described above, it is important that the orientations of the reinforcing carbon fibers contained in the inner cylinder and the outer cylinder are different from each other.
【００１８】図１は本発明の炭素複合材構造物の構造を
示す概略図である。炭素複合材構造物１０は、炭素質マ
トリックス中に炭素繊維が円筒の径方向に対して５〜２
０°の範囲の角度を有するヘリカル状に配置された炭素
繊維強化炭素複合材料で形成された内層円筒部１２と、
炭素質マトリックス中に炭素繊維が円筒の円周にヘリカ
ル状に配置された炭素繊維強化炭素複合材料で形成され
た外層円筒部１４とからなる。内層円筒部では前記予め
確定されたヘリカル巻角度に従った直線で表される配向
を有し、外層円筒部では円筒と略同心円状の配向を有し
ており、本概略図において、円筒内部の炭素繊維１６の
配向はそれらを繊維方向の配向で模式的に表記してい
る。また、本態様では、図１に示されるように、内層円
筒部１２の外側と外層円筒部１４の内側にはテーパー加
工が施されている。この加工を行うことで内部からの強
い加圧による応力集中が効果的に防止されるため、耐久
性の観点から好ましい態様である。テーパー角度は１°
〜５°程度が好ましく、１°未満ではテーパー加工の効
果は不十分であり、５°を超えると炭素繊維を配向させ
る際の加工性が低下するため、いずれも好ましくない。FIG. 1 is a schematic view showing the structure of the carbon composite material structure of the present invention. The carbon composite material structure 10 has a carbonaceous matrix in which carbon fibers have a diameter of 5 to 2 in the radial direction of the cylinder.
An inner cylindrical portion 12 formed of a carbon fiber reinforced carbon composite material arranged in a helical shape having an angle of 0 °,
An outer layer cylindrical portion formed of a carbon fiber reinforced carbon composite material in which carbon fibers are helically arranged around the circumference of a cylinder in a carbonaceous matrix. The inner cylindrical portion has an orientation represented by a straight line according to the predetermined helical winding angle, and the outer cylindrical portion has a substantially concentric orientation with the cylinder. The orientation of the carbon fibers 16 is schematically represented by the orientation in the fiber direction. In this embodiment, as shown in FIG. 1, the outside of the inner cylindrical portion 12 and the inside of the outer cylindrical portion 14 are tapered. By performing this processing, stress concentration due to strong internal pressurization is effectively prevented, which is a preferable embodiment from the viewpoint of durability. 1 ° taper angle
About 5 ° is preferable, and if it is less than 1 °, the effect of the taper processing is insufficient, and if it exceeds 5 °, the workability at the time of orienting the carbon fiber is deteriorated, and neither is preferable.
【００１９】この炭素繊維強化炭素複合体に用いる炭素
繊維としては、２０００℃未満の熱処理により得られる
炭素質繊維も、２０００℃以上の高温処理により黒鉛化
されて得られる黒鉛質繊維のいずれも使用でき、好まし
くは、２０００℃以上の高温処理されたものである。ま
た、繊維原料としてもＰＡＮ系、レーヨン系、ピッチ
系、熱硬化性樹脂系のいずれのものも使用できる。As the carbon fiber used in the carbon fiber reinforced carbon composite, either a carbonaceous fiber obtained by a heat treatment at a temperature of less than 2000 ° C. or a graphitic fiber obtained by graphitization by a high temperature treatment at a temperature of 2000 ° C. or more can be used. It is preferably a high-temperature-treated one of 2000 ° C. or more. As the fiber raw material, any of PAN, rayon, pitch, and thermosetting resin can be used.
【００２０】炭素繊維は、ストランドやそれを束ねたロ
ービング、撚り糸状に集束したヤーン等のいずれの繊維
の集束状態のものも使用することができる。As the carbon fibers, any fibers such as strands, rovings obtained by bundling the strands, and yarns bundled in the form of twisted yarns can be used.
【００２１】また、本発明において、前記炭素繊維と複
合される炭素質マトリックス材料としては、不活性ガス
の存在下や真空等の不活性雰囲気中で加熱することによ
り炭素化しうる所謂炭素源と称される樹脂、ピッチ等の
有機化合物を挙げることができる。この加熱により炭素
を生成する有機化合物として用いられる物質は、具体的
には、残炭率の高いコールタールピッチ、フェノール樹
脂、フラン樹脂、エポキシ樹脂、フェノキシ樹脂やグル
コース等の単糖類、蔗糖等の少糖類、セルロース、デン
プン等の多糖類などの等の各種糖類が挙げられ、なかで
も、残炭率の観点から、フェノール樹脂が好ましい。こ
れらの材料は加熱条件により炭素質となったり、黒鉛質
となったりするが、本発明における炭素質マトリックス
とは、両者を包含するものである。In the present invention, the carbonaceous matrix material to be composited with the carbon fibers is a so-called carbon source which can be carbonized by heating in the presence of an inert gas or in an inert atmosphere such as a vacuum. And organic compounds such as pitch and the like. The substance used as the organic compound that generates carbon by heating is, specifically, a coal tar pitch having a high residual carbon ratio, a phenol resin, a furan resin, an epoxy resin, a monosaccharide such as a phenoxy resin or glucose, a sucrose or the like. Examples include various sugars such as oligosaccharides, polysaccharides such as cellulose and starch, and among them, phenol resins are preferred from the viewpoint of the residual carbon ratio. These materials become carbonaceous or graphite depending on the heating conditions, and the carbonaceous matrix in the present invention includes both.
【００２２】前記の各材料を複合化して炭素繊維強化炭
素複合体からなる内層円筒部や外層円筒部を作製する。
炭素繊維にマトリックスを適用する方法としては、樹脂
等のマトリックス材料を含浸させる方法と化学蒸着によ
る方法があるが、処理の簡便性、コストを考慮すれば、
含浸法が一般的であるといえる。The above-described materials are compounded to produce an inner layer cylindrical portion and an outer layer cylindrical portion made of a carbon fiber reinforced carbon composite.
As a method of applying a matrix to carbon fibers, there are a method of impregnating a matrix material such as a resin and a method by chemical vapor deposition, but in consideration of simplicity of processing and cost,
It can be said that the impregnation method is common.
【００２３】内層円筒部はテーパー角度１〜５°を有す
る構造物の最終形状に合わせて準備された金属円筒型に
所定の厚み及び幅になるように、集束された炭素繊維
を、図３（Ａ）に示すように内層円筒の径方向に対し５
°〜２０°のヘリカル巻き角度有するようにヘリカル状
に巻き付ける。また、外層円筒部もテーパー角度１〜５
°を有する構造物の最終形状に合わせて準備された金属
円筒型に所定の厚み及び幅に集束された炭素繊維を、図
３（Ｂ）に示すようにヘリカル状に巻きつける。ここ
で、内層円筒の炭素繊維のヘリカル巻き角度が５°未
満、即ち、内層円筒の炭素繊維と外層円筒の炭素繊維と
の配向の角度差が５°未満では、一層円筒構造で全てを
同様なヘリカル巻とした従来の場合と同様に繊維間の剥
離が生じやすくなり、２０°を超えると、加工性の観点
から巻きが困難となり、均一な巻き、即ち、所定の炭素
繊維の配向が形成し難い。The inner layer cylindrical portion is formed by arranging carbon fibers bundled into a metal cylindrical mold prepared according to the final shape of a structure having a taper angle of 1 to 5 ° so as to have a predetermined thickness and width, as shown in FIG. As shown in A), 5 mm in the radial direction of the inner cylinder.
It is wound in a helical manner so as to have a helical winding angle of about 20 °. Further, the outer cylindrical portion also has a taper angle of 1 to 5.
As shown in FIG. 3B, helically wound carbon fibers bundled in a predetermined thickness and width on a metal cylinder prepared according to the final shape of the structure having an angle. Here, when the helical winding angle of the carbon fibers in the inner cylinder is less than 5 °, that is, when the difference in the orientation between the carbon fibers in the inner cylinder and the carbon fibers in the outer cylinder is less than 5 °, the same is applied to a single-layer cylindrical structure. As in the case of the conventional helical winding, peeling between the fibers is liable to occur. When the angle exceeds 20 °, winding becomes difficult from the viewpoint of workability, and uniform winding, that is, a predetermined carbon fiber orientation is formed. hard.
【００２４】上記により金型に巻き付けた炭素繊維に炭
素源である有機化合物を含浸させ、熱硬化させた後、金
属円筒を抜き取って炭素繊維と有機化合物とからなる円
筒形状の構造物を形成し、その後、この円筒形状の構造
物を真空あるいは不活性雰囲気下で、温度１０００℃以
上で焼成、或いは所望により加圧焼成する。After the carbon fiber wound around the mold is impregnated with an organic compound as a carbon source and cured by heat as described above, a metal cylinder is extracted to form a cylindrical structure composed of the carbon fiber and the organic compound. Thereafter, the cylindrical structure is fired at a temperature of 1000 ° C. or higher in a vacuum or an inert atmosphere, or fired under pressure if desired.
【００２５】この焼成により、有機化合物が炭素化或い
は黒鉛化されて体積、重量ともに減少し、複合材中に空
孔が形成される。このため、さらに前記熱硬化樹脂に含
浸し、焼成することを繰り返して、所望の比重になるま
で処理を行う。なお、空孔部が完全に炭素質マトリック
スで充填されたことは、含浸、焼成を繰り返しても炭素
複合材構造物の重量が増加しなくなることで確認でき
る。By this calcination, the organic compound is carbonized or graphitized to reduce both the volume and the weight, and pores are formed in the composite material. For this reason, the impregnation with the thermosetting resin and the calcination are repeated until the desired specific gravity is reached. In addition, it can be confirmed that the pores are completely filled with the carbonaceous matrix because the weight of the carbon composite material structure does not increase even if the impregnation and firing are repeated.
【００２６】炭素繊維と炭素質マトリックス（炭化後）
の比率（重量比）は所望の強度、特性により適宜選択で
きるが、例えば、ホットプレス用のダイス等に用いる場
合には、強度等の特性を引き出す目的で、７０：３０〜
５５：４５程度が好ましく、さらに６０：４０前後を目
安に含浸を行なうことが好ましい。Carbon fiber and carbonaceous matrix (after carbonization)
The ratio (weight ratio) can be appropriately selected depending on the desired strength and characteristics. For example, when used in a hot press die or the like, the ratio (weight ratio) is 70:30 or more for the purpose of extracting the characteristics such as strength.
It is preferably about 55:45, and more preferably about 60:40.
【００２７】また、焼成温度も目的に応じて選択しうる
が、本発明の目的には、２０００℃以上、さらに、２５
００〜３０００℃程度の焼成温度であることが黒鉛化を
完全に行うことができ、強度が向上する観点から好まし
い。The firing temperature can be selected according to the purpose.
A firing temperature of about 00 to 3000 ° C. is preferable from the viewpoint that graphitization can be completely performed and strength is improved.
【００２８】こうして得られた外層円筒部、内層円筒部
は、カーボンセメント等の接着手段によって互いに接着
して二層円筒構造を有する炭素繊維強化炭素複合材構造
物を得る。この炭素複合材構造物は、ホットプレス用ダ
イスとして有用である。この使用態様の例として、図４
に、この二層円筒構造を有する炭素複合材構造物を配置
したホットプレス機１８の概略断面図を示す。内層円筒
部１２と外層円筒部１４とからなる二層円筒構造を有す
る炭素複合材構造物１０を黒鉛ダイスとして配置した他
は、先に図２に示した公知のホットプレス機と同様の構
成を有する。The outer cylindrical portion and the inner cylindrical portion thus obtained are bonded to each other by a bonding means such as carbon cement to obtain a carbon fiber reinforced carbon composite material structure having a two-layer cylindrical structure. This carbon composite material structure is useful as a die for hot pressing. As an example of this usage mode, FIG.
FIG. 2 is a schematic cross-sectional view of a hot press machine 18 in which the carbon composite material structure having a two-layer cylindrical structure is arranged. Except that the carbon composite material structure 10 having a two-layer cylindrical structure composed of the inner cylindrical part 12 and the outer cylindrical part 14 is arranged as a graphite die, the configuration is the same as that of the known hot press machine previously shown in FIG. Have.
【００２９】本発明の二層円筒構造を有する炭素複合材
構造物は、繰り返し強い内圧が掛かった場合において
も、高い耐久性を示し、強化剤である炭素繊維間の剥離
によるクラックの発生やダイスの破損を効果的に防止し
うる。このため、本発明の炭素複合材構造物は、ねじれ
等の剪断力や内圧のかかる部材、即ち、先に述べたホッ
トプレス用ダイス、プッシャー式連続炉のプッシャー
棒、機械構造部材の連結などに用いられるボルト、高温
用治具、モールド等に好適に適用することができ、応用
範囲も広い。The carbon composite material structure having a two-layer cylindrical structure of the present invention exhibits high durability even when a strong internal pressure is repeatedly applied thereto. Can be effectively prevented. For this reason, the carbon composite material structure of the present invention is a member to which a shearing force such as torsion or an internal pressure is applied, that is, a hot press die, a pusher rod of a pusher type continuous furnace, a connection of a mechanical structural member, and the like. It can be suitably applied to used bolts, high-temperature jigs, molds, and the like, and has a wide application range.
【００３０】[0030]
【実施例】（実施例１） ［二層円筒構造を有する炭素複合材構造物の作製］高さ
２５０ｍｍの内層円筒用金属円筒型に、６０００フィラ
メントの炭素繊維を、ヘリカル巻き角度が円筒の径方向
に対し１５°となるようにヘリカル状に巻き付けて、上
端部厚み２５ｍｍとなるように、炭素繊維の外周をテー
パー角度３°を有するように形成した。また、内層円筒
のテーパー角度３°と同様のテーパー角度を有する高さ
２５０ｍｍの外層円筒用金属円筒型に同じ炭素繊維をヘ
リカル状に巻きつけて、下端部外径が２５ｍｍの円筒形
となるように形成した。EXAMPLES (Example 1) [Preparation of carbon composite material structure having two-layer cylindrical structure] Carbon fiber of 6000 filaments was placed in a 250 mm-high metal cylinder for an inner layer cylinder, and the helical winding angle was the diameter of the cylinder. The carbon fiber was wound in a helical manner so as to be 15 ° with respect to the direction, and the outer periphery of the carbon fiber was formed so as to have a taper angle of 3 ° so as to have an upper end thickness of 25 mm. In addition, the same carbon fiber is helically wound around a 250 mm high metal cylinder for an outer cylinder having a taper angle similar to the taper angle of the inner cylinder of 3 ° so that the lower end has a 25 mm outer diameter. Formed.
【００３１】上記により金型に巻き付けた炭素繊維にフ
ェノール樹脂を含浸させ、３００℃で加熱して熱硬化さ
せた後、金属円筒を抜き取り、円筒形状の構造物を不活
性ガス（アルゴン）雰囲気下で、温度２０００℃以上で
焼成する。この含浸、焼成を７回繰り返し、さらに、フ
ェノール樹脂を含浸し、焼成しても重量が増加しなくな
ることを確認して、含浸、焼成を終了して構造体を得
た。得られた内筒と外筒をカーボンセメントで接着し
て、二層円筒構造を有する炭素複合材構造物を得た。最
終的な炭素繊維と炭化後のマトリックスの比率は６０：
４０であった。 ［性能評価］前記で得た炭素複合材構造物を黒鉛ダイス
として図４に示すようなホットプレス機に組み込んだ。
このホットプレス機で厚さ２５ｍｍの薄い炭素質焼結体
を作製した。焼結温度の条件は２３５０℃、面圧４００
〜５００ｋｇ／ｃｍ2 の範囲でホットプレス処理を行っ
た。この焼結体の作製を５０回繰り返した後、ダイスを
取り出して観察したところ、外観上問題になるクラック
の発生や劣化は見られなかった。The carbon fiber wound around the metal mold is impregnated with a phenol resin, heated at 300 ° C. and thermally cured, then the metal cylinder is pulled out, and the cylindrical structure is removed under an inert gas (argon) atmosphere. At a temperature of 2000 ° C. or more. This impregnation and firing were repeated seven times, and further impregnation with a phenol resin was performed. After confirming that the weight did not increase even after firing, the impregnation and firing were completed to obtain a structure. The obtained inner cylinder and outer cylinder were bonded with carbon cement to obtain a carbon composite material structure having a two-layer cylindrical structure. The final carbon fiber to carbonized matrix ratio is 60:
It was 40. [Evaluation of Performance] The carbon composite material structure obtained above was incorporated as a graphite die into a hot press as shown in FIG.
With this hot press machine, a thin carbonaceous sintered body having a thickness of 25 mm was produced. The conditions of sintering temperature are 2350 ° C, surface pressure 400
Hot pressing was performed in the range of 500 kg / cm 2 . After the production of this sintered body was repeated 50 times, the dice were taken out and observed. As a result, no occurrence of cracks or deterioration which was a problem in appearance was found.
【００３２】（比較例１）前記実施例１で得た二層円筒
構造を有する炭素複合材構造物による黒鉛ダイスの代わ
りに、ダイス厚み５０ｍｍ、高さ２５０ｍｍの、炭素繊
維をヘリカル状に巻いた一層円筒構造の炭素複合材構造
物黒鉛ダイスを用いて実施例１と同様の条件で、繰り返
しホットプレス処理を行った。この焼結体の作製を２０
回繰り返したところ、中心部から炭素繊維間が剥離し、
黒鉛ダイスが破損した。Comparative Example 1 Instead of the graphite die of the carbon composite material having a two-layer cylindrical structure obtained in Example 1, carbon fibers having a die thickness of 50 mm and a height of 250 mm were helically wound. The hot pressing treatment was repeatedly performed under the same conditions as in Example 1 using a graphite die having a single-layer cylindrical carbon composite material structure. The production of this sintered body was
Repeated times, the carbon fiber peeled from the center,
The graphite die was damaged.
【００３３】[0033]
【発明の効果】本発明の炭素繊維強化炭素複合材構造物
は、薄いセラミックス焼結体をホットプレスにより製造
する際にも、長期間使用可能であり、高温高圧の過酷な
条件下で繰り返し使用しても高い耐久性を示し、ホット
プレス用ダイスとして好適に用いうるという効果を奏す
る。The carbon fiber reinforced carbon composite material structure of the present invention can be used for a long time even when a thin ceramic sintered body is manufactured by hot pressing, and is repeatedly used under severe conditions of high temperature and high pressure. However, it has the effect of exhibiting high durability and being suitable for use as a hot press die.
【図１】 本発明の二層円筒構造を有する炭素複合材構
造物の構成を示す概略図である。FIG. 1 is a schematic view showing a configuration of a carbon composite material structure having a two-layer cylindrical structure of the present invention.
【図２】 通常のホットプレス機の構成を示す概略図で
ある。FIG. 2 is a schematic view showing a configuration of a normal hot press machine.
【図３】 二層円筒構造を有する炭素複合材構造物部材
の製造において、炭素繊維を内層円筒用金属筒にヘリカ
ル角度１５°を有するように巻き付けた状態を示す概略
斜視図である。FIG. 3 is a schematic perspective view showing a state in which carbon fibers are wound around a metal cylinder for an inner layer cylinder so as to have a helical angle of 15 ° in the production of a carbon composite material structural member having a two-layer cylindrical structure.
【図４】 二層円筒構造を有する炭素複合材構造物部材
の製造において、炭素繊維を外層円筒用金属筒にヘリカ
ル状に巻き付けた状態を示す概略斜視図である。FIG. 4 is a schematic perspective view showing a state in which carbon fibers are helically wound around a metal cylinder for an outer layer cylinder in manufacturing a carbon composite material structural member having a two-layer cylindrical structure.
【図５】 本発明の二層円筒構造を有する炭素複合材構
造物を黒鉛ダイスとして組み込んだホットプレス機の構
成を示す概略図である。FIG. 5 is a schematic view showing a configuration of a hot press machine incorporating a carbon composite material structure having a two-layer cylindrical structure of the present invention as a graphite die.
【符号の説明】 １０ 二層円筒構造を有する炭素複合材構造物（黒鉛ダ
イス） １２ 内層円筒部 １４ 外層円筒部 １６ 炭素繊維 １８ 二層円筒構造を有する炭素複合材構造物を配置し
たホットプレス機 ２０ 汎用のホットプレス機 ２２ 黒鉛モールド ２４ ダイス ２６、２８ スペーサー ３０、３２ パンチ[Description of Signs] 10 Carbon composite material structure having two-layer cylindrical structure (graphite die) 12 Inner-layer cylindrical portion 14 Outer-layer cylindrical portion 16 Carbon fiber 18 Hot-pressing machine in which carbon composite material structure having a two-layer cylindrical structure is arranged 20 General-purpose hot press machine 22 Graphite mold 24 Dies 26, 28 Spacer 30, 32 Punch
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 35/80 Ｃ０４Ｂ 35/80 Ｂ Ｋ Ｆターム(参考） 4G032 AA14 AA52 BA02 GA17 4G054 AA09 AA15 AB01 4K018 AA40 AB07 AB08 BC29 CA09 DA11 DA31 DA32 EA06 FA06 GA06 JA40 KA19 Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat II (reference) C04B 35/80 C04B 35/80 BK F term (reference) 4G032 AA14 AA52 BA02 GA17 4G054 AA09 AA15 AB01 4K018 AA40 AB07 AB08 BC29 CA09 DA11 DA31 DA32 EA06 FA06 GA06 JA40 KA19
Claims (4)
であって、該二層円筒構造が、炭素質マトリックス中に
炭素繊維が内層円筒の径方向に対して５〜２０°の範囲
にあるようなヘリカル巻き角度でヘリカル状に配置され
た炭素繊維強化炭素複合材料で形成された内層円筒部
と、炭素質マトリックス中に炭素繊維が外層円筒の円周
にヘリカル状に配置された炭素繊維強化炭素複合材料で
形成された外層円筒部とからなる、ことを特徴とする炭
素複合材構造物。1. A carbon composite material structure having a two-layer cylindrical structure, wherein the two-layer cylindrical structure has carbon fibers in a carbonaceous matrix in a range of 5 to 20 ° with respect to the radial direction of the inner cylinder. An inner layer cylindrical portion formed of a carbon fiber reinforced carbon composite material arranged in a helical shape with a certain helical winding angle, and carbon fibers in a carbonaceous matrix in which carbon fibers are arranged helically around the outer layer cylinder A carbon composite material structure comprising: an outer layer cylindrical portion formed of a reinforced carbon composite material.
の外周面にテーパー加工を施したことを特徴とする請求
項１に記載の炭素複合材構造物。2. The carbon composite material structure according to claim 1, wherein an inner peripheral surface of the outer cylindrical portion and an outer peripheral surface of the inner cylindrical portion are tapered.
あることを特徴とする請求項２に記載の炭素複合材構造
物。3. The carbon composite structure according to claim 2, wherein the angle of the taper is in a range of 1 to 5 °.
された炭素繊維強化炭素複合材料が、炭素源をバインダ
ーとして、炭素繊維を所望の配向で配置した複合原料を
焼成して得られる材料であることを特徴とする請求項１
及至３のいずれか１項に記載の炭素複合材構造物。4. A carbon fiber reinforced carbon composite material in which carbon fibers are arranged in a carbonaceous matrix is a material obtained by firing a composite material in which carbon fibers are arranged in a desired orientation using a carbon source as a binder. 2. The method according to claim 1, wherein
4. The carbon composite material structure according to any one of Items 3 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16339698A JP4252640B2 (en) | 1998-06-11 | 1998-06-11 | Carbon composite structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16339698A JP4252640B2 (en) | 1998-06-11 | 1998-06-11 | Carbon composite structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000001377A true JP2000001377A (en) | 2000-01-07 |
| JP4252640B2 JP4252640B2 (en) | 2009-04-08 |
Family
ID=15773104
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16339698A Expired - Fee Related JP4252640B2 (en) | 1998-06-11 | 1998-06-11 | Carbon composite structure |
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| Country | Link |
|---|---|
| JP (1) | JP4252640B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013039696A (en) * | 2011-08-12 | 2013-02-28 | Ihi Aerospace Co Ltd | Method of manufacturing die and hot press with the die |
| CN116768642A (en) * | 2023-08-17 | 2023-09-19 | 成都飞机工业（集团）有限责任公司 | Preparation method of long spiral fiber toughened ceramic matrix composite |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017006924A (en) * | 2015-06-16 | 2017-01-12 | トヨタ自動車株式会社 | Green compact molding device |
| KR101892954B1 (en) * | 2016-08-31 | 2018-08-29 | 국방과학연구소 | Rhenium-carbon composite and manufacturing method for the same |
-
1998
- 1998-06-11 JP JP16339698A patent/JP4252640B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013039696A (en) * | 2011-08-12 | 2013-02-28 | Ihi Aerospace Co Ltd | Method of manufacturing die and hot press with the die |
| CN116768642A (en) * | 2023-08-17 | 2023-09-19 | 成都飞机工业（集团）有限责任公司 | Preparation method of long spiral fiber toughened ceramic matrix composite |
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| Publication number | Publication date |
|---|---|
| JP4252640B2 (en) | 2009-04-08 |
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