Macroscale Superlubricity on Engineering Steel in the Presence of Black Phosphorus
Macroscale Superlubricity on Engineering Steel in the Presence of Black Phosphorus
复制标题
黑磷存在下工程钢的宏观超润滑性
DOI：
10.1021/acs.nanolett.1c01437
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发表时间：
2021
期刊：
影响因子：
10.8
通讯作者：
Chu Paul K.
中科院分区：
文献类型：
--
作者：
Tang Gongbin;Wu Zhibin;Su Fenghua;Wang Haidou;Xu Xing;Li Qiang;Ma Guozheng;Chu Paul K.
摩擦和磨损是降低机械运动部件寿命和造成能量损失的主要原因。期望在工业材料上实现宏观尺度的超润滑性以使摩擦最小化。本文中，二维材料黑磷（BP）被制备为油酸（OA）中的油基纳米添加剂，并且显示出在高压下在钢/钢接触处产生宏观尺度的超润滑性。实验和分子动力学模拟表明，BP迅速捕获的羧基，作为高接触压力和热量的结果，OA分解释放钝化物种和重组，形成无定形碳，从而产生复合固体摩擦膜与BP。OA和钝化基团吸附在固体摩擦膜上产生钝化层，从而产生宏观超润滑性。研究结果提供了基本的洞察摩擦化学机制的性质，并提出了一种新的方法来实现宏观超润滑的工业材料。
Friction and wear are the main reasons for decreasing the lifetime of moving mechanical components and causing energy loss. It is desirable to achieve macroscale superlubricity on industrial materials for minimizing friction. Herein, the two-dimensional material black phosphorus (BP) is prepared as an oil-based nanoadditive in oleic acid (OA) and shown to produce macroscale superlubricity at the steel/steel contact under high pressure. Experiments and molecular dynamics simulation reveal that BP quickly captures the carboxylic group and, as a result of the high contact pressure and heat, OA decomposes to release passivating species and recombines to form amorphous carbon giving rise to a composite solid tribofilm with BP. The OA and passivating groups adsorb onto the solid tribofilm to produce the passivating layer, thus resulting in macroscale superlubricity. The findings provide fundamental insight into the nature of tribochemical mechanisms and suggest a new approach to achieve macroscale superlubricity of industrial materials.