Mechanical Behavior of Ultrafine-Grained Ni-Carbon Nanotube Composite
Abstract
Ultrafine-grained (UFG) Ni and multi-walled carbon nanotube (CNT) composite powders were prepared using non-covalent functionalization of CNTs to promote cohesion between the metal powders and CNTs. Following consolidation using spark plasma sintering, the resultant Ni-CNT composites had densities >97 % with well-dispersed CNT reinforcements. Tensile testing revealed comparable fracture strengths between the reinforced and unreinforced UFG Ni, whereas the former exhibited smaller fracture strain than the latter. In addition, the former had higher micro-hardness than the latter. The results are rationalized using a shear-lag model, and it is suggested that grain edge lengths should be used as the reinforcement lengths when applying the model to tensile stress response descriptions.
Recommended Citation
J. V. Nguyen et al., "Mechanical Behavior of Ultrafine-Grained Ni-Carbon Nanotube Composite," Journal of Materials Science, vol. 49, no. 5, pp. 2070 - 2077, Springer Netherlands, Mar 2014.
The definitive version is available at https://doi.org/10.1007/s10853-013-7897-1
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0022-2461
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2014 Springer Netherlands, All rights reserved.
Publication Date
01 Mar 2014
