| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系所 === 105 === This study aimed to improve the lubrication performance of lubricating oil by adding Ti and Sn nanoparticles into mineral oil. Focusing on Ti and Sn nanoparticles at different concentrations, this study analyzed the tribological features of the nanoparticles with additive of Ti and Sn nanoparticles. Besides, this study tested the worn surface of sample, including appraisal of its ingredients and appearance of worn surface. The differences of friction coefficient was analyzed. Experimental results show that adding Ti and Sn nanoparticles into lubricating oil can enhance wear resistance and reduce friction coefficient. Under the condition of Ti nanoparticles at concentration 0.5 wt%, the frication coefficient can be reduced by 59.4 % respectively comparing to pure lubricating oil. In addition, addition the condition of Sn nanoparticles at concentration 0.5 wt%, the frication coefficient can be reduced by 59.4 % respectively comparing to pure lubricating oil. By comparison, the tribological features of Sn nanoparticles into lubricating oil is better than Ti nanoparticles into lubricating oil at the same concentrations. In conclusion, the significant finding show that the tribological mechanism is that a deposit film in the contacting regions was formed, which prevented the direct contact of rubbed surfaces and greatly reduced the friction force between contacting surface. Besides, the spherical shape of Ti and Sn composite nanoparticles functioned as rolling ball between the rubbed surfaces.
|
|---|
