|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Late News Posters
||PP-10: Dispersion of Carbon Nanotubes in Aluminum Improves Radiation Resistance
||Kang Pyo So, Akihiro Kushima, Mingda Li, Ju Li
|On-Site Speaker (Planned)
||Kang Pyo So
We can mass-produce metal / carbon nanotubes (CNTs) composites that show improved radiation tolerance. The 0.5 wt% Al+CNTs 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 sp2 bonded graphene transform to sp3 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, and provide an essential solution to the gas accumulation problem.