单向碳纤维／热解碳复合材料的高温蠕变行为  

CREEP BEHAVIOUR OF AN UNIDIRECTIONAL C_F/C_P COMPOSITE AT HIGH TEMPERATURES

作　　者：乔生儒[1] 骆蓉[1] 杨峥[1] 康沫狂[1] 

机构地区：[1]西北工业大学

出　　处：《金属学报》1994年第11期B524-B526,共3页Acta Metallurgica Sinica

基　　金：国家自然科学基金;航空基金

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℃范围内侧定材料的蠕变性能，用红外测温仪测量温度，温度波动控制在±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℃。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 nm_3. 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 )

关 键 词：复合材料 高温蠕变 碳纤维 热解碳 激活能 

分 类 号：TG332[金属学及工艺—金属压力加工]