TY - JOUR
T1 - Reactive molecular dynamics study of frictional behavior of PTFE in ultra-low temperature LO2 environments
AU - Luo, Yiyao
AU - Guo, Jindao
AU - Chen, Fei
AU - Yan, Ke
AU - Fang, Bin
AU - Sun, Jiannan
AU - Zhang, Xinglong
AU - Hong, Jun
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2025/10
Y1 - 2025/10
N2 - This study employs reactive molecular dynamics (ReaxFF MD) simulations to investigate the tribological mechanisms of polytetrafluoroethylene (PTFE) under a liquid oxygen (LO2) environment. By comparatively analyzing the frictional behavior of systems with and without LO2 at 51 K, 78 K, and 100 K, the cooling and lubrication mechanisms of LO2 are elucidated. The results reveal that LO2 significantly reduces the temperature of both the friction pairs and the PTFE, achieving maximum reductions of 16.78 % and 46.86 %, respectively, at 78 K environment. Concurrently, LO2 effectively diminishes both the friction force and its fluctuations through the formation of a Fe-O lubricating film, thereby mitigating interfacial adhesion and shear resistance.
AB - This study employs reactive molecular dynamics (ReaxFF MD) simulations to investigate the tribological mechanisms of polytetrafluoroethylene (PTFE) under a liquid oxygen (LO2) environment. By comparatively analyzing the frictional behavior of systems with and without LO2 at 51 K, 78 K, and 100 K, the cooling and lubrication mechanisms of LO2 are elucidated. The results reveal that LO2 significantly reduces the temperature of both the friction pairs and the PTFE, achieving maximum reductions of 16.78 % and 46.86 %, respectively, at 78 K environment. Concurrently, LO2 effectively diminishes both the friction force and its fluctuations through the formation of a Fe-O lubricating film, thereby mitigating interfacial adhesion and shear resistance.
KW - Cryogenic environment
KW - Friction and lubrication
KW - Liquid oxygen
KW - Molecular dynamics
KW - PTFE
UR - https://www.scopus.com/pages/publications/105004357306
U2 - 10.1016/j.triboint.2025.110788
DO - 10.1016/j.triboint.2025.110788
M3 - 文章
AN - SCOPUS:105004357306
SN - 0301-679X
VL - 210
JO - Tribology International
JF - Tribology International
M1 - 110788
ER -