摘要
研究了预制体结构及其成型工艺和基体类型对C/C复合材料的力学性能、烧蚀性能和微观结构的影响。结果表明,它们对C/C复合材料的拉伸和压缩强度影响不显著,而对剪切性能影响明显。采用CVD成型工艺和树脂炭基体,对于二维预制体,C/C复合材料的剪切强度可达19MPa;对于准三维预制体,C/C复合材料层间剪切强度可达20MPa。不同类型的基体炭对复合材料的耐烧蚀性影响不同,CVD炭具有优异的抗烧蚀性能,树脂炭与沥青炭的抗烧蚀性能较差。采用先沉积后树脂浸渍炭化补充增密,可制备综合性能优异的热结构复合材料。
The effects of structure, forming process and matrix type of preform on the mechanical properties, ablation resistance and micro-structure of C/C composite were investigated. The results show that they have small effect on tensile and compression strength of C/C composite but obvious effect on interlaminar shear strength（ILSS）. For 2D preform, the ILSS of C/C composite can be up to 19 MPa by using CVD forming process and resin-based carbon. For quasi-3D preform, it can reach 20 MPa. The effects of different matrix type on ablation resistance of C/C composite are different, and ablation resistance of C/C composite with CVD forming process is superior to that with resin-based carbon and pitch-based carbon. So the thermal structure composite with excellent synthetic performance can be prepared by first CVD and then resin impregnation for complementary densification.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2007年第1期64-67,共4页
Journal of Solid Rocket Technology
基金
973项目(2006CB600902)
关键词
C/C扩张段
预制体
基体
微观结构
divergent section of C/C composite
preform
matrix
micro-structure
