Mechanical properties of 3D carbon/carbon composites by nanoindentation technique  

作　　者：WEI Li-ming ZHANG Yue XU Cheng-hai QI Fei MENG Song-he 韦利明;张月;许承海;齐菲;孟松鹤(Center for Composite Materials,Harbin Institute of Technology,Harbin 150080,China;Institute of Structural Mechanics,China Academy of Engineering Physics,Mianyang 621900,China;School of Foreign Languages,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]Center for Composite Materials,Harbin Institute of Technology,Harbin 150080,China [2]Institute of Structural Mechanics,China Academy of Engineering Physics,Mianyang 621900,China [3]School of Foreign Languages,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Central South University》2012年第1期36-40,共5页中南大学学报（英文版）

基　　金：Project(61391) supported by the National Security Basic Research Program of China;Project (91016029) supported by the National Natural Science Foundation of China

摘　　要：Nanoindentation tests were conducted to investigate the near-surface mechanical properties of the individual components(fiber and matrix) for three-dimensional reinforced carbon/carbon composites(3D C/C).Optical microscope and polarizing light microscope were used to characterize the microstructure of 3D C/C.The microscopy results show that large number of pores and cracks exist at both bundle/matrix interface and pitch carbon matrix.These defects have important effect on the mechanical behavior of 3D C/C.The in situ properties for components of 3D C/C were acquired by nanoindentation technique.Relative to the matrix sample,the fiber samples have more larger values for modulus,stiffness and hardness.However,there is no significant difference of modulus and stiffness among fiber samples with different directions.Nanoindentation tests were conducted to investigate the near-surface mechanical properties of the individual components （fiber and matrix） for three-dimensional reinforced carbon/carbon composites （3D C/C）. Optical microscope and polarizing light microscope were used to characterize the microstructure of 3D C/C. The microscopy results show that large number of pores and cracks exist at both bundle/matrix interface and pitch carbon matrix. These defects have important effect on the mechanical behavior of 3D C/C. The in situ properties for components of 3D C/C were acquired by nanoindentation technique. Relative to the matrix sample, the fiber samples have more larger values for modulus, stiffness and hardness. However, there is no significant difference of modulus and stiffness among fiber samples with different directions.

关 键 词：C/C composites mechanical properties NANOINDENTATION MICROSTRUCTURE 

分 类 号：TB332[一般工业技术—材料科学与工程]