公开(公告)号：FR2659962A1

公开(公告)日：1991-09-27

申请号：FR9103258

申请日：1991-03-18

Applicant: AGENCY IND SCIENCE TECHN

Inventor： SHIOYAMA HIROSHI ,  SOUMA ISAO ,  TATSUMI KUNIAKI ,  NARISAWA MASAKI

IPC: C04B35/52 ,  C04B35/83

Abstract: Process for the production of a C/C composite comprising a carbon matrix and carbon fibres and exhibiting a difference in crystalline structures of the carbon matrix between (a) the part situated at the interface and in the vicinity of the interface between the carbon fibres and the carbon matrix and (b) the remainder of the carbon matrix. This C/C composite exhibits excellent mechanical strength and thermal conductivity properties. The process for the production of this C/C composite comprises the insertion of a carbonisation catalyst into the carbon fibres, the impregnation of these carbon fibres containing the carbonisation catalyst inserted therein, with a precursor of the carbon matrix, and calcination of the impregnation product.

公开(公告)号：JPH04125107A

公开(公告)日：1992-04-24

申请号：JP24423790

申请日：1990-09-14

Applicant: AGENCY IND SCIENCE TECHN

Inventor： IKEDA SHIGERU ,  NARISAWA MASAKI ,  SOMA ISAO ,  ADACHI MASAKAZU ,  SHIOYAMA HIROSHI ,  TATSUMI KUNIAKI

IPC: C04B35/52 ,  B28B3/00

Abstract: PURPOSE:To mold carbon powder including no volatile component into the desired shape without using a bonding material by feeding the carbon powder including no volatile content into a mold and retaining the same in a high-frequency induction oven or a graphite electric resistance oven for a given time under the given atmosphere, load and temperature. CONSTITUTION:Carbon powder prepared by coking coal or petroleum pitch, removing completely the volatile content to a substantial extent and pulverized carbon powder is fed into a proper molding tool and is set in a high-frequency induction oven. Then, a reaction device is vacuumized or turned into inactive gas atmosphere. 100-5000kg/cm load is applied from above the molding tool. After that, the temperature in the device is raised up to 1700-3000 deg.C. Also the retaining time for heat treatment is different for different sintering temperature, and usually is in the range of 1-100 minutes. A carbon product can be molded easily and at low cost by using an easily available raw material without requiring a special device.

公开(公告)号：JPH03271162A

公开(公告)日：1991-12-03

申请号：JP7157990

申请日：1990-03-20

Applicant: AGENCY IND SCIENCE TECHN

Inventor： SHIOYAMA HIROSHI ,  SOMA ISAO ,  TATSUMI KUNIAKI ,  NARISAWA MASAKI

IPC: C04B35/52 ,  C04B35/83

Abstract: PURPOSE:To obtain C/C composite having excellent bonding properties of carbon fiber and matrix at the interface and more excellent properties such as mechanical properties or thermal conductivity in comparison with the conventional products by bringing carbon fiber subjected to intercalation of a carbonizing catalyst into contact with a raw material of carbon matrix and burning. CONSTITUTION:A C/C composite having properties such as strength or thermal conductivity corresponding to the required conditions is obtained by using carbon fibers having different species of carbonizing catalyst and/or amount of intercalation. Namely, at least a species of carbonizing catalyst is previously subjected to intercalation with a carbon fiber and said carbon fiber is used as a reinforcing material and impregnated with carbon source as a matrix, then resultant system is burned. Besides, e.g. coal tar pitch-based carbon fiber is exemplified as the carbon fiber. Further, chemical species having catalytic function to carbonizing reaction, e.g. AlCl3 is used as the carbonizing catalyst. Furthermore, the amount of intercalation of the carbonizing catalyst is preferably in the range of 0.5-10wt.% to the carbon fiber, as usual.

公开(公告)号：JPH0497962A

公开(公告)日：1992-03-30

申请号：JP21662090

申请日：1990-08-16

Applicant: AGENCY IND SCIENCE TECHN

Inventor： IKEDA SHIGERU ,  NARISAWA MASAKI ,  SOMA ISAO ,  ADACHI MASAKAZU ,  SHIOYAMA HIROSHI ,  TATSUMI KUNIAKI

IPC: C04B37/00

Abstract: PURPOSE:To maintain uniform joining strength between carbon materials over a wide temp. range and to prevent the exfoliation of the joined surfaces by interposing a metallic silicon sheet between the carbon materials and holding them in a flow of gaseous nitrogen under special conditions. CONSTITUTION:A metallic silicon sheet is interposed between carbon materials, 50-500kg/cm load is placed and they are heated to 1,400-1,900 deg.C at 100-250 deg.C/min rate in a flow of gaseous nitrogen under ordinary pressure and are held for 2-15 min.

公开(公告)号：JPH0497960A

公开(公告)日：1992-03-30

申请号：JP21661990

申请日：1990-08-16

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ADACHI MASAKAZU ,  IKEDA SHIGERU ,  NARISAWA MASAKI ,  SOMA ISAO ,  SHIOYAMA HIROSHI ,  TATSUMI KUNIAKI

IPC: C04B37/00

Abstract: PURPOSE:To eliminate the pore in the bonding part and to attain sufficient bonding strength by interposing a carbonaceous powder free of volatiles between graphite and graphite and maintaining the assembly under specified conditions. CONSTITUTION:A carbonaceous powder free of volatiles is interposed between graphite and graphite, the assembly is heated to 1500-3000 deg.C in vacuum or in an inert gas atmosphere and maintained for 3-30min under the load of 100-2000kg/cm , and the graphite and graphite are bonded together. The carbonaceous powder free of volatiles to be used is obtained by carbonizing coal or petroleum pitch at 600-1800 deg.C to completely remove the volatiles and pulverizing the material to