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

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 microstructu...

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Bibliographic Details
Published inJournal of Central South University Vol. 19; no. 1; pp. 36 - 40
Main Authors Wei, Li-ming, Zhang, Yue, Xu, Cheng-hai, Qi, Fei, Meng, Song-he
Format Journal Article
LanguageEnglish
Published Heidelberg Central South University 2012
Subjects
Engineering
Metallic Materials
nanoindentation
microstructure
C/C composites
mechanical properties
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Summary: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.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-012-0969-6