Non‐Empirical Law for Nanoscale Atom‐by‐Atom Wear. Issue 2 (7th December 2020)

• Record Type: Journal Article
• Authors: Wang, Yang; Xu, Jingxiang; Ootani, Yusuke; Ozawa, Nobuki; Adachi, Koshi; Kubo, Momoji
• Is Part Of: Advanced science. Volume 8:Issue 2(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-07
• Subjects: diamond‐like carbon -- interfacial bonds -- molecular dynamics -- nanoscale wear law -- wear; Science -- Periodicals; 505
• DOI: 10.1002/advs.202002827
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: Wear of contact materials results in energy loss and device failure. Conventionally, wear is described by empirical laws such as the Archard's law; however, the fundamental physical and chemical origins of the empirical law have long been elusive, and moreover empirical wear laws do not always hold for nanoscale contact, collaboratively hindering the development of high‐durable tribosystems. Here, a non‐empirical and robustly applicable wear law for nanoscale contact situations is proposed. The proposed wear law successfully unveils why the nanoscale wear behaviors do not obey the description by Archard's law in all cases although still obey it in certain experiments. The robustness and applicability of the proposed wear law is validated by atomistic simulations. This work affords a way to calculate wear at nanoscale contact robustly and theoretically, and will contribute to developing design principles for wear reduction. Abstract : A non‐empirical wear law for nanoscale contact situations is proposed and then its robustness and applicability on various contact states are validated by atomistic simulations. This work successfully unveils why nanoscale wear behaviors do not generally obey the description by conventional macroscale empirical laws and then contributes to the development of anti‐wear materials.