Macroscale superlubricity has attracted increasing attention owing to its high significance in engineering and economics. We report the superlubricity of engineering materials by the addition of partially oxidized black phosphorus (oBP) in an oleic acid (OA) oil environment. The phosphorus oxides produced by active oxidation exhibit lower friction and quick deposition performance compared to BP particles. The H-bond (-COOH⋯O-P, or -COOH⋯O=P) formed between P-O bond (or P=O) and OA molecule could benefit the lubricating state and decrease the possibility of direct contact between rough peaks. The analysis of the worn surface indicates that a three-layer tribofilm consisting of amorphous carbon, BP crystal, and phosphorus oxide forms during the friction, which replaces the shear interface from the steel/steel to carbon—oBP/carbon—oBP layer and enables macroscale superlubricity.

宏观超润滑由于其在工程和经济学上的重要意义而引起越来越多的关注。我们报告了在油酸（OA）油环境中添加部分氧化黑磷（oBP）的工程材料的超润滑性。与BP颗粒相比，活性氧化产生的磷氧化物表现出较低的摩擦和快速沉积性能。PO键（或P=O）与OA分子之间形成的H键（-COOH⋯OP，或-COOH⋯O=P）有利于润滑状态并减少粗糙峰之间直接接触的可能性。对磨损表面的分析表明，在摩擦过程中形成了由无定形碳、BP晶体和氧化磷组成的三层摩擦膜，