C/Cフクゴウザイリョウ ノ チョウコウオンカ ニオケル キョウドジンセイ

Mechanical properties of carbon fiber reinforced carbon (C/C) composites, fabricated by the preformed yarn method, were studied at elevated temperature up to 2300℃ in vacuum. Various mechanical tests including tensile, flexural, interlamina shear and fracture toughness tests were carried out to evaluate temperature dependence of strength, Young\u27s modulus and fracture toughness for three kinds of laminate C/C composites with uni-directional, 0°/90° and O°/90°/±45° fiber orientations. The failure processes of C/C composites were examined mainly focused on the influence of "transverse-cracks", which bad introduced during processing