title: Toward Zero Micro/Macro-Scale Wear Using Periodic Nano-Layered Coatings.
abstract: Wear is an important phenomenon that affects the efficiency and life of all moving machines. In this regard, extensive efforts have been devoted to achieve the lowest possible wear in sliding systems. With the advent of novel materials in recent years, technology is moving toward realization of zero wear. Here, we report on the development of new functional coatings comprising periodically stacked nanolayers of amorphous carbon and cobalt that are extremely wear resistant at the micro and macro scale. Because of their unique structure, these coatings simultaneously provide high elasticity and ultrahigh shear strength. As a result, almost zero wear was observed even after one million sliding cycles without any lubrication. The wear rate was reduced by 8-10-fold compared with the best previously reported data on extremely low wear materials.
authors.affiliation: †Center for Nano-Wear, Yonsei University, Seoul 120-749, Korea.
authors.forename: Oleksiy V
authors.initials: OV
authors.lastname: Penkov
authors.affiliation: ‡X-ray Optics Lab, National Technical University "KhPI", Kharkiv 61002, Ukraine.
authors.forename: Alexander Yu
authors.initials: AY
authors.lastname: Devizenko
authors.affiliation: §Department of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Khadem
authors.affiliation: ‡X-ray Optics Lab, National Technical University "KhPI", Kharkiv 61002, Ukraine.
authors.forename: Evgeniy N
authors.initials: EN
authors.lastname: Zubarev
authors.affiliation: ‡X-ray Optics Lab, National Technical University "KhPI", Kharkiv 61002, Ukraine.
authors.forename: Valeriy V
authors.initials: VV
authors.lastname: Kondratenko
authors.affiliation: †Center for Nano-Wear, Yonsei University, Seoul 120-749, Korea.|§Department of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea.
authors.forename: Dae-Eun
authors.initials: DE
authors.lastname: Kim
keywords: friction; mechanical properties; multilayer coating; nanostructure; simulation; sputtering; wear