| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程技術研究所 === 86 ===
The effect of adding SiC particle(40μm, 50μm) of 2 wt% and al2o3 particle (5μm, 75μm) if 5wt% into A393 AI/Si alloy on wear and corrosion propertied of materials has been studied. The pupose of reinforcements is to increase the wear resistance of AI matrix composites, but the integrity of oxide film on surface of AI alloy Will be altered, so does the corrosion behavior of the materials. Therefore, the electrochemical technique, Polarization curve measurement, is used in this study to investigate the corrosion properties of the materials.
The wear experiment is conducted via“pin on disk ”wear test. The external load of specimen is fixed at 2 kg, and the sliding speed is 2 m/s, and the distance for sliding is set at 25000m. The depth of weav is used as the index of wear resistance. Experimetal. results shows that the best wear resistance occurred on the specimens having when the particl size of 50 μm and the reinforcement particle volume fraction of 5 wt%.
The corrosion proerty of the specimens is investigated by using electrochemical principles. The polarizing curves are got by using permanent voltage meter. Under the same testing conditions, the polarization curves show that the pure alloy has lower corrosion current intensity and lower corrosion rate those of composites.
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