CAJ | 학술논문

研究了电化学抛光时间（60、180s）对常规和超细晶TiNi合金表面形貌与生物活性的影响。结果表明，电化学抛光时间从60s增加到180s时，常规Ti—Ni合金表面纳米尺度蚀坑数量增多，但仅轻微提高了其生物活性（模拟体液中Ca—P层的生长速率），而超细晶TiNi合金表面纳米蚀坑数量大幅减少，生物活性虽大幅降低，但仍显著高于常规TiNi合金。结果表明，除了增加纳米尺度蚀坑形貌外，组织超细化也是提高生物活性的一个有效方法。
연구료전화학포광시간（60、180s）대상규화초세정TiNi합금표면형모여생물활성적영향。결과표명，전화학포광시간종60s증가도180s시，상규Ti—Ni합금표면납미척도식갱수량증다，단부경미제고료기생물활성（모의체액중Ca—P층적생장속솔），이초세정TiNi합금표면납미식갱수량대폭감소，생물활성수대폭강저，단잉현저고우상규TiNi합금。결과표명，제료증가납미척도식갱형모외，조직초세화야시제고생물활성적일개유효방법。
The effect of electrochemical polishing time (60, 180s) on the surface morphology and bioactivity of conventional TiNi and ultrafine-grained TiNi alloy were investigated. The results showed that with the increase of electrochemical polishing time from 60 to 180s, the conventional TiNi alloy exhibited much higher density of nano-scale corrosion pits but only a sligher higher bioactivity (growth rate of Ca-P layer in simulated body fluid), while the ultrafine-grained TiNi alloy exhibited much lower density of nano-scale corrosion pits and a much lower bioactivity but was higher than that of conventional TiNi alloy. The present results illustruate that besides the nano-scale corrosion pit morphology, the ultrafinement processing of microstructure was an effective approach to improve bioactivity.