Relationship between the structure of C60 and its lubricity: A review

Abstract

Based on analyses of the calculations of quantum theories, such as electron charge density, the energy level distribution of orbitals, and the forces between C atoms and between the molecules in C₆₀ crystals, the author concludes that C₆₀ crystal is a promising solid lubricant. Furthermore, owing to the unique spherical structure of its molecules, high chemical stability, and the phase transition of the crystal fullerene C₆₀ may have some particular tribological properties that are superior to traditional graphite and MoS₂, especially under crucial conditions such as high vacuum, high pressure or in a humid environment. The tribological tests that have been reported show the lubricity of fullerene C₆₀, and the effects of the lubricating properties of C₆₀ on some metals are also predicted.