JP2648349B2 - Bonding method of carbon fiber / carbon composite member - Google Patents

Bonding method of carbon fiber / carbon composite member

Info

Publication number
JP2648349B2
JP2648349B2 JP63270972A JP27097288A JP2648349B2 JP 2648349 B2 JP2648349 B2 JP 2648349B2 JP 63270972 A JP63270972 A JP 63270972A JP 27097288 A JP27097288 A JP 27097288A JP 2648349 B2 JP2648349 B2 JP 2648349B2
Authority
JP
Japan
Prior art keywords
composite
members
carbon
carbon fiber
composite member
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.)
Expired - Fee Related
Application number
JP63270972A
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Japanese (ja)
Other versions
JPH02120379A (en
Inventor
仁志 塙
中島　　隆
滋 海東
厚 北村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAGANO KK
TORE KK
Original Assignee
NAGANO KK
TORE KK
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Publication date
Application filed by NAGANO KK, TORE KK filed Critical NAGANO KK
Priority to JP63270972A priority Critical patent/JP2648349B2/en
Publication of JPH02120379A publication Critical patent/JPH02120379A/en
Application granted granted Critical
Publication of JP2648349B2 publication Critical patent/JP2648349B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3436—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising independent continuous fibre-reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3484—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic
    • B29C65/3492—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic being carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72143—Fibres of discontinuous lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
    • B29K2061/04—Phenoplasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/20—Inserts
    • B29K2105/206—Meshes, lattices or nets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement

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／炭素コンポジット（以下、C/C
コンポジットという）の部材間を強固に接合する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a carbon fiber / carbon composite (hereinafter referred to as C / C
(Referred to as a composite).

（従来の技術） 炭素（または黒鉛）をマトリクスとし、炭素繊維（ま
たは黒鉛繊維）を強化材とするC/Cコンポジットは、そ
の機械的強度が著しく高いので、各種の構造部材として
利用されているとともに、導電性を有することから抵抗
発熱体の材料としても注目を集めている。(Conventional technology) C / C composites using carbon (or graphite) as a matrix and carbon fibers (or graphite fibers) as a reinforcing material have been used as various structural members because of their extremely high mechanical strength. At the same time, it has attracted attention as a material for resistance heating elements because of its conductivity.

C/Cコンポジットをこれら用途に使う場合、C/Cコンポ
ジット製の個々の部材を互いに接合して、目的形状に組
立てるということが行なわれている。When a C / C composite is used for these purposes, individual members made of the C / C composite are joined together and assembled into a desired shape.

組立体が常温下で使用される場合には、C/Cコンポジ
ット部材間を接着強度の大きい各種合成樹脂の接着剤を
用いて接合するだけでも充分である。When the assembly is used at room temperature, it is sufficient to join the C / C composite members using various synthetic resin adhesives having high adhesive strength.

しかし、組立体が、使用時に高温になる、たとえば発
熱装置の場合には、各部材間の接合部は高温に曝されし
かも導電性でなければならないということから、上記し
たような合成樹脂系の接着剤による接合では不都合であ
る。However, when the assembly is heated to a high temperature during use, for example, in the case of a heating device, the joint between the members must be exposed to high temperature and be electrically conductive. Adhesive bonding is not convenient.

このような場合の接合においては、接着剤として、炭
素（または黒鉛）粉末とエポキシ樹脂のような合成樹脂
を所定の割合で混合して成る液状またはペースト状の接
着剤を選定し、この接着剤をC/Cコンポジット部材の接
合部に塗布して両部材を圧着し、その状態を保ちつつ焼
成して前記合成樹脂を炭化するという方法が採られてい
る。In such a case, a liquid or paste-like adhesive obtained by mixing carbon (or graphite) powder and a synthetic resin such as an epoxy resin at a predetermined ratio is selected as the adhesive. Is applied to the joint portion of the C / C composite member, and the two members are press-bonded to each other.

（発明が解決しようとする課題） 上記従来方法によれば、接合部は、全体が炭化してい
るので耐熱性、導電性を具備している。しかも耐食性も
良好である。しかし最大の欠点は接合部の機械的強度が
著しく小さく、この箇所からの折損事故が多発するとい
うことである。(Problems to be Solved by the Invention) According to the above-mentioned conventional method, since the entire joint is carbonized, it has heat resistance and conductivity. Moreover, the corrosion resistance is good. However, the biggest disadvantage is that the mechanical strength of the joint is extremely low, and breakage from this point frequently occurs.

このため、たとえば、さらにC/Cコンポジット部材間
をボルトとナットで緊締して接合部の機械的強度を保持
する処置が施されている。しかしながら、このような処
理を施さなくても、充分な機械的強度が保持される接合
状態にあることが好ましいことはいうまでもない。For this reason, for example, measures are taken to further maintain the mechanical strength of the joint by tightening the bolts and nuts between the C / C composite members. However, it is needless to say that it is preferable to be in a joined state in which sufficient mechanical strength is maintained without performing such treatment.

本発明は、機械的強度が著しく高いばかりか、耐熱
性、導電性、耐食性をも有する接合部を形成することが
できる、C/Cコンポジット部材の接合方法の提供を目的
とする。An object of the present invention is to provide a method for joining a C / C composite member, which can form a joint having not only extremely high mechanical strength but also heat resistance, conductivity, and corrosion resistance.

（課題を解決するための手段） 上記目的を達成するために、本発明においては、炭素
繊維／炭素コンポジット部材、または、焼成すると炭素
繊維／炭素コンポジットになる一対の部材間の接合面
に、炭素繊維と炭化可能物質とから成るプリプレグを介
在させ、前記一対の部材で前記プリプレグを加圧しなが
ら加熱してそれら一対の部材を接合した後、非酸化性雰
囲気中にて焼成することを特徴とする炭素繊維／炭素コ
ンポジット部材の接合方法が提供される。(Means for Solving the Problems) In order to achieve the above object, according to the present invention, a carbon fiber / carbon composite member or a bonding surface between a pair of members that becomes a carbon fiber / carbon composite when fired is provided with a carbon fiber / carbon composite member. A prepreg made of a fiber and a carbonizable substance is interposed, the prepreg is heated while being pressed by the pair of members, and the pair of members is joined, and then fired in a non-oxidizing atmosphere. A method for joining a carbon fiber / carbon composite member is provided.

（作用） 前記プリプレグは、その両面に位置するC/Cコンポジ
ット部材に対する接着剤として作用すると同時に、焼成
されて自らもC/Cコンポジットとなり、C/Cコンポジット
部材間を強固に接合するようになる。(Operation) The prepreg acts as an adhesive to the C / C composite members located on both surfaces thereof, and at the same time, is baked to become a C / C composite itself, thereby firmly joining the C / C composite members. .

（実施態様） 本発明方法においては、まず一対のC/Cコンポジット
部材間の接合すべき個所に、前記プリプレグが介在せし
められる。(Embodiment) In the method of the present invention, first, the prepreg is interposed at a portion to be joined between a pair of C / C composite members.

プリプレグは、炭素繊維と炭化可能物質とから形成さ
れる。The prepreg is formed from carbon fibers and a carbonizable substance.

このときに用いる炭素繊維の形態に関しては次のよう
なものがあげられる。The form of the carbon fiber used at this time is as follows.

第１に織物である。織物は平織物、綾織物、朱子織物
のいずれであってもよい。First is the woven fabric. The woven fabric may be any of a plain woven fabric, a twill woven fabric, and a satin woven fabric.

また、特開昭51−58568号公報、特開昭59−32291号公
報にそれぞれ開示されている円形織物ないし螺旋状円形
織物を使用することができる。Further, the circular woven fabric or spiral circular woven fabric disclosed in JP-A-51-58568 and JP-A-59-32291 can be used.

第２に解繊マットである。これは、１本１本の炭素短
繊維がランダム配向しているものである。Second is a defibrated mat. This is one in which short carbon fibers are randomly oriented.

第３はチョップドストランドマットである。これは、
炭素繊維の束を所定の長さに裁断し、各裁断束をランダ
ム配向せしめて成るマットである。Third is a chopped strand mat. this is,
This is a mat in which a bundle of carbon fibers is cut into a predetermined length, and each cut bundle is randomly oriented.

第４は、スワールマットである。これは、短繊維では
なく、解繊され、または解繊されていない連続繊維（若
しくは連続繊維束）がランダム配向されているものであ
る。Fourth is a swirl mat. This is not a short fiber but a fiber that has been fibrillated or has not been fibrillated, or a continuous fiber (or a continuous fiber bundle) that is randomly oriented.

第５図は筒状編組である。これはその径方向および長
手方向への伸縮性に富む。これは平らに押しつぶして使
用することができる。FIG. 5 shows a tubular braid. It is rich in its elasticity in the radial and longitudinal directions. It can be squashed flat and used.

第６は、一方向に互いに並行に、かつテープ状または
シート状に引き揃えた、連続繊維の一方向引揃え体であ
る。これには、通常、引揃え状態を維持するために、Ｂ
ステージの、フェノール樹脂等の熱硬化性樹脂や、ピッ
チなどが含浸されている。一方向性プリプレグと呼ばれ
るものである。Sixth is a unidirectionally aligned body of continuous fibers which is aligned in one direction in parallel with each other and in a tape or sheet shape. This usually includes B to maintain the alignment.
The stage is impregnated with a thermosetting resin such as a phenol resin or a pitch. This is called a unidirectional prepreg.

第７の形態は、アスペクト比の小さい短繊維である。 A seventh aspect is a short fiber having a small aspect ratio.

また、炭化可能物質としては、Ｂステージのフェノー
ル樹脂、フラン樹脂のような熱硬化性樹脂であることが
好ましいが、石油重質油や、ピッチ、アントラセン等を
使用することもできる。The carbonizable substance is preferably a thermosetting resin such as a B-stage phenol resin or a furan resin, but heavy petroleum oil, pitch, or anthracene may also be used.

このプリプレグは、所定枚数を一対のC/Cコンポジッ
ト部材の間に介在せしめればよい。The prepreg may have a predetermined number of sheets interposed between a pair of C / C composite members.

ついで、一対の部材でプリプレグを加圧しながら加熱
する。すると、プリプレグの炭化可能物質が固化し、部
材同士が接合される。炭化可能物質が熱硬化性樹脂であ
る場合には、その樹脂が硬化するわけである。プリプレ
グの成型である。このときの加圧力は５〜30kg/cm2程
度、温度は100〜200℃程度である。Next, the prepreg is heated while being pressed by a pair of members. Then, the carbonizable substance of the prepreg is solidified, and the members are joined to each other. When the carbonizable substance is a thermosetting resin, the resin is cured. It is molding of prepreg. The pressure at this time is about 5 to 30 kg / cm 2 , and the temperature is about 100 to 200 ° C.

なお、プリプレグの成型体における、炭素繊維の体積
含有率（Vf:％）を、炭素繊維と炭化可能物質との成型
体を焼成して接合すべきC/Cコンポジット部材を得ると
きのその焼成前におけるVfと同じにし、また後述の焼成
温度を前記C/Cコンポジット部材の焼成温度と同一にす
ると、形成された接合部の抵抗率を前記C/Cコンポジッ
ト部材の抵抗率と同じ値にすることができる。これは、
C/Cコンポジット部材を発熱体とする発熱装置を組み立
てるような場合には大変好都合である。The volume content of carbon fiber (Vf:%) in the prepreg molded body was determined by calcining the molded body of the carbon fiber and the carbonizable substance before firing to obtain a C / C composite member to be joined. When the firing temperature described later is the same as the firing temperature of the C / C composite member, the resistivity of the formed joint is set to the same value as the resistivity of the C / C composite member. Can be. this is,
This is very convenient when assembling a heating device using a C / C composite member as a heating element.

ついで、成型体で接合された一対のC/Cコンポジット
部材を非酸化性雰囲気中で焼成する。すると、成型体が
C/Cコンポジットとなり、一対のC/Cコンポジット部材が
C/Cコンポジットで接合される。Next, the pair of C / C composite members joined by the molded body are fired in a non-oxidizing atmosphere. Then, the molded body
It becomes a C / C composite, and a pair of C / C composite members
Joined with C / C composite.

非酸化性雰囲気としては窒素雰囲気が好適である。さ
らに、焼成温度は、通常、600〜3000℃の範囲にあれば
よい。なお、このとき、接合すべきC/Cコンポジット部
材を製造する際に採用した焼成温度と同じ焼成温度で焼
成すると、C/Cコンポジット部材と接合部との熱膨張係
数が略同一となるため、両者間の接合界面における剥離
現象を防止することができて好適である。また、焼成時
に一対のC/Cコンポジット部材で成型体に圧力をかけて
おくと、接合強度が一層向上する。A nitrogen atmosphere is suitable as the non-oxidizing atmosphere. Further, the firing temperature may be usually in the range of 600 to 3000 ° C. At this time, when firing at the same firing temperature as the firing temperature adopted when manufacturing the C / C composite member to be joined, since the thermal expansion coefficients of the C / C composite member and the joint are substantially the same, It is preferable because a peeling phenomenon at a bonding interface between them can be prevented. Further, when pressure is applied to the molded body by a pair of C / C composite members during firing, the bonding strength is further improved.

なお、焼成後、焼成体に炭化可能物質を含浸し、再び
焼成するという操作を繰り返すと、高密度化が図れるの
で好ましい。Note that it is preferable to repeat the operation of impregnating the fired body with the carbonizable substance after firing and firing again, since the density can be increased.

以上においては、接合される一対の部材がC/Cコンポ
ジットからなるものである場合について説明したが、部
材は、上述した焼成時にC/Cコンポジットになる、たと
えば炭素繊維強化プラスチックスのようなものであって
もよい。そのような部材を使用した場合でも、結果的に
C/Cコンポジット部材同士を接合することになる。すな
わち、部材は、焼成するとC/Cコンポジットになるもの
であってもよい。In the above, the case where the pair of members to be joined is made of a C / C composite has been described.However, the members become the C / C composite at the time of the above-described firing, such as carbon fiber reinforced plastics. It may be. Even if such a member is used,
The C / C composite members will be joined together. That is, the member may be a C / C composite when fired.

（実施例） 東レ（株）製炭素繊維“トレカ”の平織物CO6343（厚
み:0.27mm、目付:200g/m2）に、メタノールで希釈した
フェノール樹脂を含浸せしめ、プリプレグを得た。(Example) Plain fabric CO6343 (thickness: 0.27 mm, basis weight: 200 g / m 2 ) of carbon fiber “Treca” manufactured by Toray Industries, Inc. was impregnated with a phenol resin diluted with methanol to obtain a prepreg.

このプリプレグを、20枚、積層したのち、150℃の温
度下に30kg/cm2の圧力を加えてフェノール樹脂を硬化
し、成型した後、窒素ガス雰囲気中において、昇温速度
100℃/hrで2000℃にまで昇温し、その温度で１時間保持
して、長さ100mm、幅100mm、厚み3mmのC/Cコンポジット
板を得た。After laminating 20 prepregs, applying a pressure of 30 kg / cm 2 at a temperature of 150 ° C. to cure and mold the phenol resin, and then molding the phenol resin in a nitrogen gas atmosphere.
The temperature was raised to 2000 ° C. at 100 ° C./hr, and the temperature was maintained for 1 hour to obtain a C / C composite plate having a length of 100 mm, a width of 100 mm, and a thickness of 3 mm.

このC/Cコンポジット板から、長さ100mm、幅25mm、厚
み3mmの板を２枚用意し、その１枚の端部から12.5mmに
かけて、上記したプリプレグを３枚重ね、その上に他の
C/Cコンポジット板の端部を重ね合せた。From this C / C composite plate, two plates having a length of 100 mm, a width of 25 mm, and a thickness of 3 mm are prepared, and three prepregs as described above are stacked from one end to 12.5 mm.
The ends of the C / C composite plate were overlaid.

この重ね合せ体を、上記のC/Cコンポジット板の成型
条件と同一条件で加熱・加圧して板同士を接合した後、
窒素ガス雰囲気炉中で2000℃で焼成した。After heating and pressing the laminated body under the same conditions as the molding conditions of the C / C composite plate to join the plates together,
It was fired at 2000 ° C. in a nitrogen gas atmosphere furnace.

２枚のC/Cコンポジット板が接合された。このときの
接合部の引張剪断強度（kg/cm2）をJISK−6850で規定す
る方法によって測定した。その結果を表に示した。Two C / C composite plates were joined. The tensile shear strength (kg / cm 2 ) of the joint at this time was measured by the method specified in JISK-6850. The results are shown in the table.

比較のために、２枚のC/Cコンポジット板を、大日本
インキ（株）製の接着剤“GC−HP"、ユニオン・カーバ
イド・コーポレーション社製のカーボンセメント“Ｃ−
34"で接着（接着剤層の厚み:0.5mm）したことを除いて
は、実施例と同様にして２枚の板を接合した。それぞれ
の場合の引張剪断強度を比較例1,比較例２として表に示
した。For comparison, two C / C composite plates were used as an adhesive “GC-HP” manufactured by Dainippon Ink and a carbon cement “C-HP” manufactured by Union Carbide Corporation.
Two plates were joined in the same manner as in the example except that they were adhered at 34 "(thickness of the adhesive layer: 0.5 mm). The tensile shear strength in each case was measured in Comparative Examples 1 and 2. As shown in the table.

ついで、これら３枚の接合体を接合部で板面垂直方向
に切断し、それぞれの切断面を目視観察した。 Subsequently, these three bonded bodies were cut in the direction perpendicular to the plate surface at the bonded portions, and each cut surface was visually observed.

実施例方法で得られたものの場合は、各接合界面は一
様に密着していてボイド等は認められなかった。しか
し、比較例方法によるものの場合は、互いの接合界面に
多数のボイドが認められ一様な接合状態ではなかった。In the case of the one obtained by the method of the example, the bonding interfaces were uniformly adhered, and no voids were observed. However, in the case of the method according to the comparative example, a large number of voids were observed at the bonding interface of each other and the bonding state was not uniform.

（発明の効果） 以上の説明で明らかなように、本発明方法によれば、
C/Cコンポジット部材の相互間を極めて強固に接合する
ことができ、しかも、その接合部は耐熱性、耐食性、導
電性を有するので、この方法は、C/Cコンポジットを発
熱体とした複雑形状の発熱装置、腐食雰囲気中で使用す
る発熱装置の組立て時に適用して極めて有用である。(Effect of the Invention) As is clear from the above description, according to the method of the present invention,
C / C composite members can be bonded very firmly to each other, and the joints have heat resistance, corrosion resistance, and conductivity. It is very useful when applied when assembling a heat generating device for use in a corrosive atmosphere.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 海東 滋 滋賀県大津市園山１丁目１番１号 東レ 株式会社滋賀事業場内 (72)発明者 北村 厚 滋賀県大津市園山１丁目１番１号 東レ 株式会社滋賀事業場内 (56)参考文献 特開 昭63−303871（ＪＰ，Ａ) 特開 平１−257172（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigeru Kaito 1-1-1, Sonoyama, Otsu-shi, Shiga Toray In the Shiga Works (72) Inventor Atsushi Kitamura 1-1-1, Sonoyama, Otsu-shi, Shiga Toray Toray (56) References JP-A-63-303871 (JP, A) JP-A-1-257172 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】炭素繊維／炭素コンポジット部材、また
は、焼成すると炭素繊維／炭素コンポジットになる一対
の部材間の接合面に、炭素繊維と炭化可能物質とから成
るプリプレグを介在させ、前記一対の部材で前記プリプ
レグを加圧しながら加熱してそれら一対の部材を接合し
た後、非酸化性雰囲気中にて焼成することを特徴とする
炭素繊維／炭素コンポジット部材の接合方法。A prepreg made of carbon fiber and a carbonizable substance is interposed between a carbon fiber / carbon composite member or a joining surface between a pair of members that become a carbon fiber / carbon composite when fired, and the pair of members is provided. And heating the prepreg while applying pressure to join the pair of members, followed by firing in a non-oxidizing atmosphere.
JP63270972A 1988-10-28 1988-10-28 Bonding method of carbon fiber / carbon composite member Expired - Fee Related JP2648349B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63270972A JP2648349B2 (en) 1988-10-28 1988-10-28 Bonding method of carbon fiber / carbon composite member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63270972A JP2648349B2 (en) 1988-10-28 1988-10-28 Bonding method of carbon fiber / carbon composite member

Publications (2)

Publication Number Publication Date
JPH02120379A JPH02120379A (en) 1990-05-08
JP2648349B2 true JP2648349B2 (en) 1997-08-27

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Application Number Title Priority Date Filing Date
JP63270972A Expired - Fee Related JP2648349B2 (en) 1988-10-28 1988-10-28 Bonding method of carbon fiber / carbon composite member

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Country Link
JP (1) JP2648349B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2161547A1 (en) * 1993-04-30 1994-11-10 Joseph Santin Boyce A reinforced joint for composite structures and method of joining composite parts
US9113825B2 (en) 2012-07-10 2015-08-25 Fujifilm Sonosite, Inc. Ultrasonic probe and aligned needle guide system

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