Volume 2, Issue 2 (February 2005)

    Tensile, Flexural, and Shear Properties of Neutron Irradiated SiC/SiC Composites with Different Fiber-Matrix Interfaces

    (Received 3 June 2004; accepted 17 October 2004)

    Published Online: 2005

    CODEN: JAIOAD

      Format Pages Price  
    PDF Version 13 $25   ADD TO CART


    Abstract

    Unidirectional SiC/SiC composites fabricated with highly-crystalline and stoichiometric fibers and matrix, but with three different interfacial types (single-layer pyrolytic carbon (PyC), multilayered SiC/PyC, and pseudo porous SiC interfaces) were irradiated up to 1.0 × 1025 n/m2 (E > 0.1 MeV) at 1073 and 1273 K. Tensile, inter-laminar shear, and flexural properties were evaluated to compare the role of different interfaces on neutron irradiation behavior. There was nearly no significant degradation in tensile and flexural strength after high-temperature neutron irradiation, except for porous SiC interphase composite. Moreover, no meaningful reduction of tensile modulus was identified regardless of interphase types, although 20–40% degradation in flexural moduli occurred due to a reduction in inter-laminar shear modulus. In contrast, matrix cracking stress was significantly dependent on interfacial properties. Multilayer interphase composites exhibited the best irradiation stability. Irradiation instability of thick PyC and porous SiC interphase resulted in 20% and 40% degradations of matrix cracking stress, respectively.


    Author Information:

    Nozawa, T
    Postdoctoral Associate, Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    Ozawa, K
    Graduate Student, Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto,

    Kondo, S
    Graduate Student, Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto,

    Hinoki, T
    Lecturer, Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto,

    Katoh, Y
    Senior Researcher, Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    Snead, LL
    Senior Researcher, Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

    Kohyama, A
    Professor, Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto,


    Stock #: JAI12884

    ISSN: 1546-962X

    DOI: 10.1520/JAI12884

    ASTM International is a member of CrossRef.

    Author
    Title Tensile, Flexural, and Shear Properties of Neutron Irradiated SiC/SiC Composites with Different Fiber-Matrix Interfaces
    Symposium Effects of Radiation on Materials: 22nd International Symposium, 2004-06-10
    Committee E10