Surface reinforcement of metals by carbon nanomaterials followed by high intense energy irradiation

Institute of Thermal and Atomic energy, National Research University, “Moscow Power Engineering Institute”,14 Krasnokazarmennaya st., 111250, Moscow. Russia

Adv. Mater. Lett., 2018, 9 (10), pp 733-736

DOI: 10.5185/amlett.2018.2107

Publication Date (Web): Jul 18, 2018

Copyright © IAAM-VBRI Press

E-mail: eletskii@mail.ru

Abstract

The metal surface modification by carbon nanostructures followed by high intense treatment has been realized. As carbon nanostructures were used: carbon soot formed in an arc discharge with graphite electrodes remained after extraction of fullerenes; fullerene C₆₀; partially reduced graphene oxide. An intense pulsed laser and electron beam accelerator were used as high intense energy sources. Measurements performed indicate that the above described processing of the steel surface results in a considerable enhancement of the microhardness (up to 800%) and a notable decrease (up to 50%) in the friction coefficient. The degree of reinforcement depends on both the type of nanocarbon and the source of energy. The maximum effect of reinforcement is reached for fullerene C₆₀ coverage and laser irradiation. The dependence of the microhardness of the treated surface on the irradiation energy has a non-monotone character reaching the maximum value of about 200 J/cm² at the laser irradiation and 400 J/cm² at the e-beam irradiation.

Keywords

Metal surface reinforcement, carbon nanostructures, fullerenes.