Understanding the Effect of Oil-Based Lubricants on the Tribological Behavior of Fe-Cr Alloys from Reactive Molecular Dynamics

被引：7
|
作者：
Zhu, Xiaohua [1 ]
Luo, Yiyao [1 ]
Liu, Yunhai [1 ]
Wang, Xiaowen [1 ]
Zhang, Hu [1 ]
Zhao, Xiao [2 ]
机构：
[1] Southwest Petr Univ, Sch Mechatron Engn, Chengdu 610500, Peoples R China
[2] Pipechina Guizhou Pipeline Co Ltd, Guiyang 550081, Peoples R China
来源：
LANGMUIR | 2023年 / 39卷 / 14期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
FRICTION; STEEL; FILMS;
D O I：
10.1021/acs.langmuir.3c00217
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, the frictional behaviors of Fe-Cr alloys in the lubricating effect of oil-based lubricant are investigated through reactive molecular dynamics. It is shown that the oil-based lubricant achieves ultralow friction through hydrodynamic lubrication by linear alpha olefin (C8H16) and passivation of the friction pairs by hydrogen gas (H2) and free H atoms generated by the friction chemistry. Moreover, there is a critical value for the transition of the crystal structure of Fe-Cr alloy from body-centered cubic (Bcc) to amorphous structure (Other), leading to a dramatic change in friction. Meanwhile, a sliding interface consisting of a large number of amorphous structures is formed near the rigid layer, which keeps the friction force stable.
引用
收藏
页码：5145 / 5155
页数：11
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