Effect of Hydrogenation of C60 Fullerenes on the Properties of Their Transformation Products at High Pressures and Temperatures

• Published in: Nanobiotechnology Reports (Online) 2022-08, Vol.17 (4), p.534-540
• Main Authors: Chernogorova, O. P., Drozdova, E. I., Lukina, I. N., Sirotinkin, V. P., Khomich, A. A., Klyamkin, S. N., Ekimov, E. A.
• Format: Article
• Language: English
• Subjects: Amorphization; Buckminsterfullerene; Chemistry and Materials Science; Coefficient of friction; Composite materials; Fullerenes; Functional and Structural Nanomaterials; High pressure; Hydrogenation; Indentation; Industrial and Production Engineering; Machines; Manufacturing; Materials Science; Modulus of elasticity; Nanotechnology; Processes; Raman spectroscopy; Superelasticity; Tribology; Wear resistance
• ISSN: 2635-1676; 1995-0780; 2635-1684; 1995-0799
• DOI: 10.1134/S2635167622040061

New superelastic superhard carbon materials are obtained from C 60 fullerites hydrogenated in the solid state in a hydrogen atmosphere to a content of 0.4 wt % H (formula ~C 60 H 3.5 ). Raman spectroscopy, light and electron microscopy, dynamic indentation, and tribological tests are used to study composite materials (CM) synthesized from mixtures of powders of Co and 10-wt % fullerites C 60 or C 60 H 3.5 under a pressure of 8 GPa at a temperature of 800°C. Hydrogenation of the initial fullerites increases the degree of amorphization of the structure of the high-pressure graphite-like phase, while its hardness increases by more than 2.5 times, up to ~52 GPa, and the elastic modulus during indentation increases by about 3 times, up to 333 GPa. The hydrogenation of C 60 fullerites is a promising method for improving the tribotechnical characteristics of the superelastic hard phase formed during the thermobaric treatment of fullerites, as well as CMs reinforced with particles of such a phase: the CM friction coefficient decreases from 0.25 to 0.01 with a significant increase in wear resistance.