Tajima Kiyoshi, Hironaka Masahisa, Chen Ker-Kong, Nagamatsu Yuki, Kakigawa Hiroshi, Kozono Yoshio
Division of Biomaterials, Kyushu Dental College, 2-6-1 Manazuru, Kokurakita, Kitakyushu 803-8580, Japan.
Dent Mater J. 2008 Mar;27(2):258-65. doi: 10.4012/dmj.27.258.
A newly developed electropolishing system, equipped with an original agitation function for an electrolyte and using a safe electrolyte composed of an alcoholic solution, was applied for wrought and cast CP titanium and its alloys. Surface roughness and morphology of the polished surfaces were then examined. Under an electrolytic condition of 70-75 V, 2.0 kA/m2, and 30 degrees C, wrought CP Ti and Ti-6Al-4V alloy achieved an apparent mirror-like finishing with an average surface roughness (Ra) of 0.03 and 0.12 microm respectively. Under the same condition, on the other hand, cast CP Ti and Ti-6Al-7Nb alloy produced rougher polished surfaces with average Ra values of 0.67-0.80 microm, and the finishing was apparently shiny, but not mirror-like. SEM observation of the polished surfaces showed that wrought CP Ti was even and completely featureless, while wrought Ti-6Al-4V alloy was pitted. For cast CP Ti, a needle-like phase containing traces of iron was observed on the polished surface.
一种新开发的电解抛光系统，配备了用于电解液的独特搅拌功能，并使用由酒精溶液组成的安全电解液，应用于锻造和铸造的工业纯钛及其合金。然后检查了抛光表面的粗糙度和形貌。在70 - 75 V、2.0 kA/m²和30℃的电解条件下，锻造工业纯钛和Ti - 6Al - 4V合金分别获得了平均表面粗糙度（Ra）为0.03和0.12微米的明显镜面光洁度。另一方面，在相同条件下，铸造工业纯钛和Ti - 6Al - 7Nb合金产生了更粗糙的抛光表面，平均Ra值为0.67 - 0.80微米，并且表面明显发亮，但不是镜面。对抛光表面的扫描电子显微镜观察表明，锻造工业纯钛表面均匀且完全无特征，而锻造Ti - 6Al - 4V合金表面有凹坑。对于铸造工业纯钛，在抛光表面观察到含有微量铁的针状相。
