Non-empirical law for nanoscale atom-by-atom wear


Publication Details


Yang Wang, Jingxiang Xu, Yusuke Ootani, Nobuki Ozawa, Koshi Adachi, and Momoji Kubo


Advanced Science



Online publication date

December 7, 2020

Press release online (in Japanese)

PDF: 428KB


Comparison of wear amount of diamond-like carbon as a function of applied normal force calculated by our proposed wear law (blue line) and molecular dynamics simulations (black rectangle).
Left and right figures show wear amount of self-affine rough surface and smooth ball-on-disk contact, respectively.
For the rough surface contact, wear amount is proportional  to applied normal load, whereas for the  smooth ball-on-disk contact, wear amount increases with applied normal load quasi-exponentially. Our proposed wear law qualitatively reproduces the above interesting load dependence of wear obtained by molecular dynamics simulations.