张仁辉 刘宇航

摘要：【目的】为了探究甲醇、异丙醇在相同载荷、不同转速工况下的润滑性能，重点探究转速对甲醇、异丙醇润滑性能的影响。【方法】利用四球摩擦磨损试验机测定甲醇、异丙醇在98 N，400，500 r/min和600 r/min耦合工况下的摩擦学性能。【结果】摩擦测试实验结果表明：对于甲醇润滑体系，随着转速的增加，磨合期明显缩短，在500 r/min下摩擦体系显示最小的磨斑直径，对于异丙醇润滑体系，随着转速的增加，摩擦系数基本保持恒定，磨斑直径随着转速的增加先减小后增加，在500 r/min下摩擦体系显示最小的磨斑直径。【结论】甲醇润滑体系的低摩擦磨损性能归因于氧化钨（WO2和WO3）、甲醇、摩擦诱导的无定形碳、摩擦对偶四者形成的“微轴承”的作用；而异丙醇润滑体系的优异摩擦学性能主要归因于摩擦诱导形成的具有润滑作用的无定形碳。结合光学显微镜、拉曼光谱、透射电子显微镜等表征方法，对甲醇、异丙醇的润滑机理进行了系统探究，研究结果可为醇基物质在精密设备领域的应用提供参考。

关键词：摩擦诱导；无定形碳；润滑；甲醇；异丙醇

中图分类号：TH117.1 文献标志码：A

文章编号：1005-0523（2024）02-0102-07

Friction-Induced Transformation of Monoalcohols to Amorphous Carbon and Its Friction-Reducing and Wear-Resistant Properties

Zhang Renhui， Liu Yuhang

（School of Materials Science and Engineering， East China Jiaotong University， Nanchang 330013， China）

Abstract： 【Objective】In order to investigate the lubricity of methanol and isopropanol under the same load and the different rotational speed， and the effect of rotational speed on the lubricity is mainly emphasize investigated.【Method】The tribological properties of methanol and isopropanol under 98 N， 400， 500 r/min and 600 r/min are conducted using four-ball wear machine. 【Result】The experimental results show that in terms of lubrication system of methanol， the run-in stage is shortened with increasing rotational speed， and the smallest wear scar diameter is obtained at 500 r/min. In terms of the lubrication system of isopropanol， friction coefficient is kept the constant with increasing the rotational speed， but the wear scar diameter initially decreases and then increases with increasing rotational speed， and the smallest one is obtained at 500 r/min. 【Conclusion】The low friction and wear of the lubrication system of methanol is attributed to the micro-bearing consisting of tungsten oxide （WO2 and WO3）， methanol， friction-induced amorphous carbon and tribo-pairs. And the excellent tribological performance of the tribosystem of isopropanol is assigned to the effect of amorphous carbon with lubricity that induced by tribochemistry. Combination of optical microscope， Raman spectra， transition electron microscope， the lubrication mechanism of methanol and isopropanol is well investigated. The research results can provide references for the application of alcohols in the field of precision equipment.

Key words： friction-induced; amorphous carbon; lubricity; methanol; isopropanol

Citation format： ZHANG R H，LIU Y H. Friction-induced transformation of monoalcohols to amorphous carbon and its friction-reducing and wear-resistant properties[J]. Journal of East China Jiaotong University， 2024， 41（2）： 102-108.

【研究意义】摩擦磨损一直是机械系统及工业领域最常见的物理现象，也是导致能量损耗和机械设备失效的重要原因。据统计，全球约1/3的一次能源因摩擦而消耗，大约80%的机器零部件失效因磨损造成。我国在2014年因摩擦磨损造成的经济损失达31 800 亿元，约占当年国内生产总值的5%[1]。润滑材料被认为是降低摩擦磨损的最佳手段，润滑材料按物理状态和特性可以划分为液体润滑剂、半固体润滑剂和固体润滑剂三类。……