Multi-wall carbon nanotubes formation by using Metal Dusting process

Laboratory tests were designed to produce accelerated metal dusting by exposing 304L austenitic stainless steel to a 50CO-50H2 (vol. pct) gas mixture at 620oC for 300 hours. Surface morphology of the samples was examined by stereoscopy and SEM with EDS attachment. The carbonaceous depositions on sample surface were analyzed using SEM and TEM. In this paper, we demonstrate that multi-wall CNTs can be prepared by exploiting the metal dusting process. It has been confirmed herein that the amount of the CNTs remarkably increases when the reaction time is extended up to 300 hours, indicating a possibility of the mass production.

Keywords:

Metal dusting , Nano-sized carbon filament , Multi-wall carbon nanotubes