| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 101 === In this study, the effect of TiO2 Nano-powders in the polymer-based diamond disk is investigated. The disk was made by compression molding technology. The polyurethane was used as the matrix material of the diamond grinding disk and nano-TiO2 was also added into the composite with different proportions. Taguchi method was employed to design the experiments. The surface roughness and friction coefficient were measured and analyzed by ANOVA method. The results show the optimal conditions for the diamond disk are diamond weight of 0.04 g, the compression force of 210 N, and the RB type 2 diamond powders with the mean size of 7.41 μm. In addition, the TiO2 added diamond disk is much stable than the others.
In the tribological experiments of polyurethane with and without TiO2 Nano-powders, the results show that the wear rate of pure polyurethane is about two times than the polyurethane with TiO2. It was also found that the transfer film was generated on the surface of steel. The formation of transfer film can increase wear resistance and produce lower shear performance. The results show that when nano-TiO2 particles are added to the composite material, the matrix has high wear resistance and low friction coefficient performance, which significantly enhance the carrying capacity of the polyurethane Nano-composite.
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