Spectroscopic Investigation of the Chemical Changes in Bulk Lubricant and Lubricant Solid Interface

要控制摩擦和磨损，必须了解主体润滑剂和固体润滑剂界面中发生的物理和化学变化。这个项目将使用光谱技术在现实条件下研究这些物理和化学机会。用激光光散射和振动光谱研究了散装油中的胶束化和氧化现象随温度、磨损和抗氧化剂以及氧气压力的变化。无论是在静态条件下还是在动态条件下，都将遵循界面上发生的变化。在静态条件下，衰减全内反射红外光谱将被用来监测油和添加剂在固体-润滑剂界面的吸附-脱附和反应动力学。对数据的分析将得到速率常数以及关于润滑剂分子与固体表面的排列和结合的化学信息。固体表面的氧化动力学将通过对金属氧化物形成的振动带的分析来确定。也许最能提供信息的测量将在现实条件下使用钻石滑块获得。使用单次反射FTIR和拉曼散射技术，可以实时测量接触点后面润滑膜和固体表面的化学状态，作为载荷和温度的函数。

Knowledge of the physical and chemical changes occuring in the bulk lubricant and the solid-lubricant interface is essential in order to control friction and wear. This program will employ spectroscopic techniques to study these physical and chemical chances under realistic conditions. Laser light scattering and vibrational spectroscopy will be used to investigate the micellization and oxidation phenomena in bulk oil,as a function of temperature, wear and anti-oxidation additives and oxygen pressure. The changes occurring at the interface will be followed both under static and dynamic conditions. Under static conditions attenuated total internal reflection IR spectroscopy will be used to monitor the adsorption-desorption, and reaction kinetics of the oil and the additives at the solid-lubricant interface. Analysis of the data will yield rate constants as well as chemical information about the alignment and binding of the lubricant molecules to the solid surface. The oxidation kinetics of the solid surface will be determined from an analysis of the vibrational bands due to the formation of metal oxides. Perhaps the most informative measurements will be obtained under realistic conditions with a diamond slider. Using single reflection FTIR and Raman scattering the chemical condition of the lubricant film and the solid surface will be measured in real time right behind the contact point as a function of load and temperature.