一方向及び二方向炭素繊維強化SiC複合セラミックスの機械特性に及ぼす繊維配向性の影響

概要

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Uni directional and two directional carbon fiber rein forced SiC composites (here in after referred as UD-C_f/SiC and 2D-C_f/SiC, respectively) were fabricated by hot pressing method to investigate the ' influence of fiber orientation angle (θ) to applied load direction on flexural strength and fracture toughness. (1) The UD-C_f/SiC composite with θ=0°showed highest strength and highest fracture toughness. They were 950 MPa at room temperature, 1050 MPa at 1450℃ and 30 MPa m^<1/2>, respectively. (2) The flexural strength of UD-C_f/ SiC composites with θ= θ° were estimated by using flex ural strengths of UD-C_f/SiC composites with θ= θ° and θ=90°and "Tai Hill Theory" . (3) Flexural strength and fracture toughness of 2D-C_f/SiC composites with the orientation angle of +θ/-θ/+θ/-θwere higher than those of UD-C_f/SiC with the same orientation all gle of +θ/+θ
社団法人日本セラミックス協会の論文
1994-11-01