Toward Zero Micro/Macro-Scale Wear Using Periodic Nano-Layered Coatings

Oleksiy V. Penkov, Alexander Yu Devizenko, Mahdi Khadem, Evgeniy N. Zubarev, Valeriy V. Kondratenko, Dae Eun Kim

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)18136-18144
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number32
Publication statusPublished - 2015 Aug 19

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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