炭化对聚丙烯腈/酚醛基炭/炭复合材料结构和力学性能影响（英文）

Influence of carbonization on structural and mechanical properties of PAN/phenolic-based carbon/carbon composites

由湿法叠涂制得的聚丙烯腈(PAN)/酚醛基碳/碳(C/C)复合材料在高性能结构材料领域具有应用潜力.为了了解炭化步骤对聚丙烯腈/酚醛基碳/碳复合材料结构和力学性能的影响,进行了层间断裂韧性(模式II)测试.由于结构特征与裂纹形成机理的相互关系对C/CSiC复合材料的制备很重要,采用阿基米德方法、扫描电子显微镜(SEM)和三点弯曲试验对复合材料的结构进行表征.实验结果显示,碳/碳(C/C)试件的层间断裂韧性为碳纤维增强酚醛塑料(CFRP)试件的59.7%.

Poly-acrylonitrile （ PAN）/phenolic-based carbon/carbon （C/C） composites manufactured by the wet layup method are potential materials for the application of high-performance structures. In order to understand the influence of carbonization step on structural and mechanical properties of PAN/phenolic-based carbon/carbon composites, the interlaminar fracture toughness （mode II） is tested. The correlation of formation mechanisms of crack with structural characteristics is important for preparation of C/C-SiC composites. The structural characteristics of the composites are characterized by Archimedes＇s method, scanning electron microscopy （SEM） and three-point bend tests. Experimental results show that the interlaminar fracture toughness of carbon/carbon specimens is 59. 7% of that of the carbon fiber reinforced phenolic resin-based plastics （CFRP） specimens.