| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 100 === In this study, we investigated wear behavior slid on graphite carbon brushes and copper ring DC motor at high-speed. In this way, the characteristics of graphite carbon brush by pin-on-disc, which we controlled the load and sliding speed of graphite carbon brushes, the influence of temperature resulting in the coefficient of friction and wear. Therefore, the research consists of two parts. The first part is to fabricate the thin film thermocouples (TFTCs) by micro-manufacturing processes .The second part of this research is the wear test of brush subjected to load of 0.5 N, 1.0 N, 3.0 N at slide speed 8.378 m/s under the condition of controlled temperature, friction coefficient and wear loss adhesive of observation friction, the adhesive and fatigue wear mechanisms of topography by SEM.According to Seebeck thermoelectric effect, we fabricated the 100 nm Copper and the 100 nm Constantan thin films on the graphite carbon brushes by dc sputtering. Then, the structure was patterned by lithography and wet etching process. In order to measure the instantaneous temperature of the slide surface, we measure the characteristic sensitivity, which were 40.39 μV/℃, 52.27 μV/℃, and 56.21 μV/℃, respectively. Conditions of the different load and high sliding speed coefficient that friction is coefficient lager 0.2, the efficiency of wear loss measurement by infrared laser displacement, for the sliding distance of about 240 km .
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