Open AccessMolecular dynamical simulation on the mechanical property of hydrogenated diamond-like carbon films
Author(s) -
Quan Wei-Long,
Hongxuan Li,
Ji Li,
Fang Zhao,
Du Wen,
Zhou Hui-Di,
Jianmin Chen
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.5687
Subject(s) - materials science , carbon fibers , diamond , diamond like carbon , composite material , elastic modulus , molecular dynamics , hydrogen , stiffness , fraction (chemistry) , modulus , carbon film , diamond cubic , thin film , composite number , nanotechnology , computational chemistry , chemistry , organic chemistry
The mechanical property of diamond-like carbon films with different hydrogen concentration is studied using molecular dynamical simulation based on REBO potential energy functions. The stiffness, hardness, and elastic modulus of the films are calculated from the load-unload curve. It is shown that both of the fraction of sp3 carbon and the concentration of H in the films have strong influence on the film hardness. When H concentration in the film is lower than 39%, the hardness is mainly determined by sp3 carbon, when H concentration further increases, the hardness decreases greatly despite the increase of the sp3 fraction.