增强毡C/C复合材料的结构和性能

Structure and Properties of the Reinforced Felt C/C Composite

设计了两种不同结构的预制体 ,即碳布 +碳毡 (1#预制体 )、无纬布 +碳毡 (2 #预制体 ) ,经化学气相沉积 (CVD)与浸渍树脂相结合的致密化工艺制备出了高密度的增强毡C C复合材料。结果表明 :1#、2 #预制体制备的C C材料表现出了良好的力学性能 ,其拉伸强度分别达 6 1 2 5MPa和 5 3 12MPa ,其中 2 #材料的拉伸破坏表现出了假塑性。结合材料的微观形貌研究了预制体结构、界面对C C复合材料拉伸性能的影响。

Two kinds of preforms used for reinforced felt carbon/carbon(C/C) composite,that was,carbon clothcarbon felt(1#),carbon fibrecarbon felt(2#),were designed in this research.The compositing technology was by chemical vapor deposition(CVD) and resin impregnation.The influence of preform and interface on tensile properties and microstructure of C/C were studied.The results show that the samples made by the two of preforms both have high tensile strength and elasticity modulus.The sample manufactured by 1# preforms reaches a tensile strength of 61^25MPa,and that by 2# preform reaches a tensile strength of 53^12MPa with a pseudoplasitc fracture behaviour.