| Summary: | 碩士 === 長庚大學 === 機械工程研究所 === 98 === This study focused on the Ti-6Al-4V electropolishing of conduct, Titanium in the electrolytic paper slurry composition as a reference and try for the Ti-6Al-4V electropolishing, In comparing the various systems, collated and analyzed, Decided to use sulfuric acid - ethanol solution of the system Ti-6Al-4V electropolishing, temperature used at room temperature (25 ℃), Change its concentration and speed so that try to achieve whole-chip level and the effect of lighting, And for the electropolishing process to be discussed phenomenon. Experiment results show, Ti-6Al-4V in 2 M sulfuric acid - ethanol solution, the electropolishing surface after leveling get better results with the lighting, By AFM measurements of Ra value of about 2.34 nm, In 3 M sulfuric acid - ethanol solution, although the limits of current district wide, but low current density and big ups and downs, After electropolishing the surface formation, is not suitable to carry out acts of electropolishing. In 1 M sulfuric acid - ethanol solution, the limiting current zone and 2 M and 3 M compared to a very narrow, After electropolishing the surface of the ups and downs, and the shortcomings of a few more, were not suitable to carry out acts of Electropolishing. From the experiment into a Ti-6Al-4V in 2 M sulfuric acid - ethanol solution, temperature 25 ℃, set potential 9 V, fixed power of 150 Coulomb, 100 to 300 rpm speed parameter can be a very good surface shape. Electropolishing process, when the current density spiking upward, you will find that absorption in the Ti-6Al-4V samples off the surface of the translucent film, This film observed using SEM and TEM analysis, we found that this seems Amorphous organizations, However, a white film on the object seems Crystalline organizations, This inference may be a white object Ti-6Al-4V precipitates in determining the course of potential electropolishing off attached to film.
|
|---|
