TY - JOUR
T1 - An investigation on the lubrication mechanism of MoS2 nano sheet in point contact
T2 - The manner of particle entering the contact area
AU - Wu, Hongxing
AU - Qin, Liguo
AU - Dong, Guangneng
AU - Hua, Meng
AU - Yang, Shuncheng
AU - Zhang, Junfeng
N1 - Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/3/1
Y1 - 2017/3/1
N2 - The goal of the work is to investigate the lubrication mechanism of MoS2 nano sheet. Polyisobutyleneamine Succinimide (PIBS) provides the steric repulsion to disperse nanoparticles in oil due to its long carbon chain. In the present study, the tribological behavior of nano-MoS2 sheet mixed with different percentages of PIBS was explored. The dispersed state and the mode of nano-MoS2 sheet entering the contact point were studied. Ball-on-disk results illustrated that the COF of nano-MoS2 in paraffin oil with free of PIBS was 26.2% compared with those containing 3 wt% PIBS, and the reduction of wear depth reached 41.9%. The nano-MoS2 sheets with 3 wt% PIBS were in discrete state in paraffin oil, which moved with side flow and could not enter the contact area to cause poor lubrication. Aggregation of particles took place in the case of low PIBS concentration and without PIBS, it entered the contact area and formed well-distributed MoS2 tribofilm to reduce friction and wear.
AB - The goal of the work is to investigate the lubrication mechanism of MoS2 nano sheet. Polyisobutyleneamine Succinimide (PIBS) provides the steric repulsion to disperse nanoparticles in oil due to its long carbon chain. In the present study, the tribological behavior of nano-MoS2 sheet mixed with different percentages of PIBS was explored. The dispersed state and the mode of nano-MoS2 sheet entering the contact point were studied. Ball-on-disk results illustrated that the COF of nano-MoS2 in paraffin oil with free of PIBS was 26.2% compared with those containing 3 wt% PIBS, and the reduction of wear depth reached 41.9%. The nano-MoS2 sheets with 3 wt% PIBS were in discrete state in paraffin oil, which moved with side flow and could not enter the contact area to cause poor lubrication. Aggregation of particles took place in the case of low PIBS concentration and without PIBS, it entered the contact area and formed well-distributed MoS2 tribofilm to reduce friction and wear.
KW - Dispersant concentration
KW - Lubrication mechanism
KW - MoS nano sheet
KW - Observation and aggregation
UR - https://www.scopus.com/pages/publications/84995757625
U2 - 10.1016/j.triboint.2016.11.009
DO - 10.1016/j.triboint.2016.11.009
M3 - 文章
AN - SCOPUS:84995757625
SN - 0301-679X
VL - 107
SP - 48
EP - 55
JO - Tribology International
JF - Tribology International
ER -