• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

Development of ultra micro-displacement using micro-coiled carbon fiber

Research Project

Project/Area Number 07650108
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionNagasaki University

Principal Investigator

IWANAGA Hiroshi  Nagasaki Univ., Faculty of Liberal Arts ; Prof., 教養部, 教授 (40039772)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Kazuo  Nagasaki Univ., Faculty of Engineering ; Prof., 工学部, 教授 (30225495)
Project Period (FY) 1995 – 1996
KeywordsCarbon fiber / Carbon coil / Micro-coil / Electrical resistivity / Tensile strength / Shear modulus
Research Abstract

In the tensile sxperiments using an optical microscope, load was applied by a weight, which was a piece of cover glass in our experiments. The weight was connected to one end of a coiled carbon, of which the other end was fixed. BY inclining the optical microscope gradually together with the microscope stage, we observed that the weight slid on the specimen. We took accurate measurements of the coiled carbon elongations from optical micrographs at inclination angles of 40゚ and 50゚.
The shear modulus G of the material is given by 64nr^4w/d^4delta where, d is the fiber diameter, r the coil radius, delta the amount of elongation and n the number of turns. The calculated shear modulus of the coiled carbon fiber is G=85 GPa.
The bulk electrical resistivity of the carbon coils was 1.0-0.2OMEGAcm depending on the bulk density. On the oter hand, the electrical resistivity on one carbon coil which is about 1mm in length, 8mum in coil diameter and 2mum in fiber diameter. The calculated electrical resistivity of the fiber was 1.09*10^<-2>OMEGAcm.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] S.Motojima,H.Iwanaga: "Vapor phase preparation of micro-coiled carbon fibers using Ni catalyst and PH3 impurity" Mater.Sci.Eng.B34. 34. 47-52 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Motojima,H.Iwanaga: "Preparation of micro-coiled TiC fibers by metal impurity activated chemical vapor deposition" Mater.Sci.Eng.B34. 34. 159-163 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Motojima,H.Iwanaga: "Vapor growth of micro-coiled ceramic fibers and their properties" J.de Physique C5. 5. 1061-1068 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Motojima,H.Iwanaga: "Preparation of SiC and TiC micro-coiled fibers by vapor phase metallization of micro-coiled carbon fibers" J.Mater.Sci.4641-4645 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Fujii,H.Iwanaga S.Motojima: "CVD growth and morphology of transition-metal phoshides" J.Cryst.Growth. 166. 99-103 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Ando,H.Iwanaga: "Growth of secondary particles on SiC Polyhedra" J.Mater.Sci.Lett.15. 1569-1572 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Motojima, H.Iwanaga: "Vapor phase preparation of micro-coiled carbon fibers using Ni catalyst and PH3 impurity" Mater.Sci.Eng. B34. 47-52 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Motojima, H.Iwanaga: "Preparation of micro-coiled TiC fibers by metal impurity activated chemical vapor deposition" Mater.Sci.Eng.B34. 159-163 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Motojima, H.Iwanaga: "Vapor growth of micro-coiled ceramic fibers and their properties" J.de Physique. C5. 1061-1068 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Motojima, H.Iwanaga: "Preparation of SiC and TiC micro-coiled fibers by vapor phase metallization of micro-coiled carbon fibers." J.Mater.Sci.31. 4641-4645 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Fujii, H.Iwanaga: "CVD growth and morphology of transition-metal phoshides." J.Cryst.Growth. 166. 99-103 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] y.Ando.H.Iwanaga: "Growth of secondary particles on Sic Polyhedra" J.Mater.Sci.Lett.15. 1569-1572 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi