Nano-engineered composites: interlayer carbon nanotubes effect
AUTOR(ES)
Carley, Glaucio, Geraldo, Viviany, Oliveira, Sergio de, Avila, Antonio Ferreira
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
05/03/2013
RESUMO
The concept of carbon nanotube interlayer was successfully introduced to carbon fiber/epoxy composites. This new hybrid laminated composites was characterized by Raman spectroscopy, X-ray diffraction, scanning electron microscopy and tensile tests. An increase on peak stress close to 85% was witnessed when CNTs interlayer with 206.30 mg was placed to carbon fiber/epoxy laminates. The failure mechanisms are associated to CNTs distribution between and around carbon fibers. These CNTs are also responsible for crack bridging formation and the increase on peak stress. Initial stiffness is strongly affected by the CNT interlayer, however, changes on stiffness is associated to changes on nano/micro-structure due to damage. Three different behaviors can be described, i.e. for interlayers with ≈ 60 mg of CNT the failure mode is based on cracks between and around carbon fibers, while for interlayers with CNT contents between 136 mg and 185 mg cracks were spotted on fibers and inside the CNT/matrix mix. Finally, the third failure mechanism is based on carbon fiber breakage, as a strong interface between CNT/matrix mix and carbon fibers is observed.
Documentos Relacionados
- Experimental Multi-scale analysis of Carbon/Epoxy Composites Nano-Reinforced by Carbon Nanotubes/Multi-layer Graphene
- Carbon nanotube buckypaper reinforced polymer composites: a review
- Bonded Joints with “Nano-Stitches”: Effect of Carbon Nanotubes on Load Capacity and Failure Modes
- Obtenção de nanocompósitos, nanodiamante sobre fibra de carbono e nanotubo de carbono sobre fibra de carbono
- Bending investigation on carbon fiber/epoxy composites nano-modified by graphene
