Triboemission of hydrocarbon molecules from diamond-like carbon friction interface induces atomic-scale wear.

ABSTRACT: Understanding atomic-scale wear is crucial to avoid device failure. Atomic-scale wear differs from macroscale wear because chemical reactions and interactions at the friction interface are dominant in atomic-scale tribological behaviors, instead of macroscale properties, such as material strength and hardness. It is particularly challenging to reveal interfacial reactions and atomic-scale wear mechanisms. Here, our operando friction experiments with hydrogenated diamond-like carbon (DLC) in vacuum demonstrate the triboemission of various hydrocarbon molecules from the DLC friction interface, indicating its atomic-scale chemical wear. Furthermore, our reactive molecular dynamics simulations reveal that this triboemission of hydrocarbon molecules induces the atomic-scale mechanical wear of D

SUBMITTER: Wang Y 

PROVIDER: S-EPMC6858253 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature