Dispersion of carbon nanotubes in aluminum improves radiation resistance

TitleDispersion of carbon nanotubes in aluminum improves radiation resistance
Publication TypeJournal Article
Year of Publication2016
AuthorsSo, KPyo, Chen, D, Kushima, A, Li, M, Kim, S, Yang, Y, Wang, Z, Park, JGil, Lee, YHee, Gonzalez, RI, Kiwi, M, Bringa, EM, Shao, L, Li, J
JournalNano Energy
Volume22
Pagination319 - 327
Date Published2016/04//
ISBN Number2211-2855
KeywordsAluminum1D nanostructures, Cladding, composites, energy, fission, Irradiation, Nanocomposite, Nuclear energy, Radiation resistance
Abstract

We can mass-produce metal/carbon nanotube (CNT) composites that show improved radiation tolerance. The 0.5 wt% Al+CNT composite showed improved tensile strength without reduction of tensile ductility before radiation, and reduced void/pore generation and radiation embrittlement at high displacements per atom (DPA). Under helium ion irradiation up to 72 DPA, the 1D carbon nanostructures survive, while sp(2) bonded graphene transforms to spa tetrahedral amorphous carbon. Self-ion (Al) irradiation converts CNTs to a metastable form of Al4C3, but still as slender 1D nanorods with prolific internal interfaces that catalyze recombination of radiation defects, reducing radiation hardening and porosity generation. The 1D fillers may also form percolating paths of "nano-chimneys" that outgas the accumulated helium and other fission gases, providing an essential solution to the gas accumulation problem. (C) 2016 Elsevier Ltd. All rights reserved.

Short TitleNano Energy