【摘要】 用化学气相沉积热解碳制备了一种单向Ｔ３００（ＰＡＮ）碳纤维增强复合材料，在１９００－２３５０℃范围内测定材料的蠕变性能。用红外测温仪测量温度，温度波动控制在上±２℃内。经计算激活能为８４．８ｋＪ／ｍｏｌ，蠕变激活体积为０．７５４ｎｍ~３。在１９００，２０５０，２２００和２３５０℃的蠕变摩擦应力分别为１２７，１１５，９５．６和９０．３ＭＰａ。外推得知，蠕变摩擦应力为零时的温度为３３７５℃，约与碳的升华温度相当。更多还原

【Abstract】 Creep behaviour of the composite made of an unidirectional T300（PAN） carbon fibre reinforced CVD pyrolytic carbon was examined in range of 1990 to 2350℃. The temperature was monitored by infrared spectrometer within ±2℃. Calculational results indicate that the activation energy is 84.8 kJ / mol and activation volume is 0.754 nm₃. The creep friction stresses are 127, 115, 95.6 and 90.3 MPa at 1900, 2050, 2200 and 2350℃ respectively. By extrapolation of the temperature dependence upon zero creep friction stress, the temperature seems to be about 3375℃ just to approach the sublimation one of carbon )更多还原