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1991 Fiscal Year Final Research Report Summary

Mechanical Property of Micro Spring-like Ceramic-fibers

Research Project

Project/Area Number 02650015
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Applied 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) MOTOJIMA Seiji  Gifu Univ., Faculty of Engineering ; Prof., 工学部, 教授 (80021608)
IWASAKI Takeshi  Nagasaki Univ., Faculty of Liberal Arts ; Prof., 教養部, 教授 (60213279)
Project Period (FY) 1990 – 1991
KeywordsTensile test / Tensile strength / Young's modulus / Carbon / Filament / Whisker
Research Abstract

A method of measuring tensile strength of a filament with a diameter of Jim order has been devised. The method allows us to measure the tensile load in the range of 20 to 1500mg with an accuracy of about 1 mg under optical-microscope observation. In order to measure the tensile strength, the cross sectional area of the specimen is estimated from a SEM micrograph of the fractured surface taken parallel to the specimen axis. Srtain is calculated by comparing the distance of markers, -i. e. 'tiny whiskers distributed on a specimen, on micrographs taken at each stage of loading. The Young's modulus and the tensile strength of a pitch-based isotropic carbon filament thus obtained were about 60GPa and 85OMPa, respectively.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] M.Fujii H.Iwanaga N.Shibata: "Morphology and Polarity of GaAs needles" J.Crystal Growth. 99. 179-182 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Iwanaga S.Motozima S.Takeuchi: "Amorphous Si_3N_4 whiskers containing a crystalline core" J.Crystal Growth. 100. 271-274 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Iwanaga S.Motojima S.Takeuchi: "Morphology of coiled whiskers of amorphous Si_3N_4 and their mechanical properties" J.Materials Science Letters. 9. 731-734 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Motojima H.Kawaguchi H.Iwanaga: "Growth of regulary coiled carbon filaments by Ni catalyzed pyrolysis of acetylene and their morphology" Applied Physics Letters. 56. 321-323 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Iwanaga T.Yoshiie S.Takeuchi: "Five Types of Inversion Twin in CdS Crystals" Phil,Mag.A. 64. 303-309 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Iwanaga T.Iwasaki S.Takeuchi: "A Method for Tensil Experinents of Veramic Fibers" The American Ceramic Society. 75. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Fujii, H. Iwanaga, N. Shibata: "Morphology and polarity of GaAs needles." J. Crystal Growth. 99. 179-182 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Iwanaga, S. Motojima, S. Takeuchi: "Amorphous Si_3N_4 whiskers containing a crystalline core." J. Crystal Growth. 100. 271-274 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Iwanaga, S. Motojima, S. Takeuchi: "Morphology of coiled whiskers of amorphous Si_4N_3 and their mechanical properties." J. materials Science Letters. 9. 731-734 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Motojima, H. Kawaguchi, H. Iwanaga.: "Growth of regularly coiled carbon filaments by Ni catalyzed pyrolysis of acetylene, and their morphology." Applied Physics Letters. 56. 321-323 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Iwanaga, T. Yoshiie, S. Takeuchi: "Five types of inversion twin in CdS crystals." Phil. Mag. A. 64. 303-309 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Iwanaga, T. Iwasaki, S. Takeuchi: "A method for tensile experiments of ceramic fibers" The American Ceramic Society. 75. (1992)

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

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Published: 1993-03-16  

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