Tribological properties of sulfur- and phosphorus-free organic molybdenum compound as additive in oil

被引：32
作者：
Huai, Wenjuan [1 ]
Chen, Xinchun [1 ]
Lu, Fei [2 ]
Zhang, Chenhui [1 ]
Ma, Liran [1 ]
Wen, Shizhu [1 ]
机构：
[1] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Tianjin Res Inst Adv Equipment, Tianjin 300300, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2020年 / 141卷 / 141期
基金：
中国国家自然科学基金;
关键词：
Lubricant; Sulfur- and phosphorus-free organ-molybde-num; MoS2; In situ formation; MOS2; FRICTION; ZDDP; DITHIOCARBAMATE; LUBRICATION; DISULFIDE; GREASES;
D O I：
10.1016/j.triboint.2019.105944
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A sulfur- and phosphorus-free organo-molybdenum (SPFM) was successfully synthesized. The friction-reducing and anti-wear properties of SPFM combined with zinc dialkyldithiophosphate (ZDDP) in base oil were assessed, revealing SPFM additive efficiently reduces the friction coefficient and exhibits good synergistic anti-wear relationship with ZDDP. The smoother wear scar surface further supports the improvement in the anti-wear behavior and synergy effect between SPFM and ZDDP. Energy dispersive x-ray spectroscopy unravels the existence of Mo and S in the tribofilms formed on the rubbing surface, and the formation of MoS2 crystalline is verified by x-ray photoelectron spectroscopy and high-resolution transmission electron microcopy. The mechanism promoting the in situ formation of MoS2 is proposed via the synergistic chemical reaction between SPFM and ZDDP during rubbing.
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页数：10
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