Effects of Electron Beam Irradiation on Elasticity of CFRTP (CF/PEEK)

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  • Takei Hiroaki
    Graduate School of Engineering, Tokai University
  • Salvia Michelle
    Ecole Centrale de Lyon
  • Vautrin Alain
    Department of Mechanical and Materials Engineering, Ecole Nationale Superieure des Mines de Saint-Etienne
  • Tonegawa Akira
    Graduate School of Science & Technology, Tokai University
  • Nishi Yoshitake
    Graduate School of Engineering, Tokai University Ecole Centrale de Lyon Department of Mechanical and Materials Engineering, Ecole Nationale Superieure des Mines de Saint-Etienne Graduate School of Science & Technology, Tokai University

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Abstract

Homogeneous low voltage electron beam irradiation (HLEBI) improved the elasticity indicated by both flexural modulus (Ef) and the maximum slope value ((dσ⁄dε)max) of the bending stress–strain curve of carbon fiber reinforced thermoplastic polyetheretherketone (CFRTP) composite sheets with 0.50 mm thickness, although the penetration depth estimated was from 0.14 to 0.21 mm on both side surfaces. HLEBI remarkably enhanced both Ef and (dσ⁄dε)max. The Ef at middle cumulative probability (PE) of 0.50 for CFRTP irradiated at 0.30 MGy (kJg−1) was 3.3 GPa, which was 27% higher (2.6 GPa) than for CFRTP before irradiation. Moreover, (dσ⁄dε)max at middle cumulative probability (PE=0.50) was more than 4.9 GPa for CFRTP irradiated at 0.30 MGy. The interfacial friction force, as well as the strengthening of both carbon fiber and polyetheretherketone probably contributed to the HLEBI effects to enhance both Ef and (dσ⁄dε)max in the CFRTP.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 52 (4), 734-739, 2011

    The Japan Institute of Metals and Materials

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