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Effect of CNT orientation on the mechanical property and fracture mechanism of vertically aligned carbon nanotube/carbon composites.
- Source :
-
Ceramics International . Mar2020, Vol. 46 Issue 4, p4933-4938. 6p. - Publication Year :
- 2020
-
Abstract
- The effect of carbon nanotube (CNT) orientation on the mechanical properties and fracture mechanisms of a vertically aligned CNT/C composite was studied in this work by a combination of nanoindentation and micropillar compression techniques. The results suggest stronger response of the composite when loading parallel to the CNT orientation. This led to higher Young's modulus and hardness (≈34 GPa and ≈3.75 GPa) at this direction than those at perpendicular direction (≈19 GPa and ≈2.6 GPa). The mechanical anisotropy led to fracture mechanisms that were also dependent on the CNT orientation. At 0° direction, the composite was fractured into segments by splitting of the micropillar. While at 90° direction, the composite was much brittle and was fractured by dual shearing, implying a strong CNT/C interface. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CARBON composites
*YOUNG'S modulus
*BRITTLE fractures
*NANOINDENTATION
*CARBON
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 46
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 141240215
- Full Text :
- https://doi.org/10.1016/j.ceramint.2019.10.230