Photofunctionalization of EB-PVD HA-coated nano-pore surface of Ti–30Nb–xZr alloy for dental implants
Photofunctionalization of EB-PVD HA-coated nano-pore surface of Ti–30Nb–xZr alloy for dental implants
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DOI：
10.1016/j.surfcoat.2012.05.018
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发表时间：
2013-08
影响因子：
5.4
通讯作者：
H. Choe
中科院分区：
文献类型：
--
作者：
H. Choe
在这项研究中，使用恒电位仪和氙灯对 Ti-30Nb-xZr 合金纳米管表面涂覆的生物活性材料进行了光电化学分析。制备三元Ti–30Nb–xZr(x=3, 15wt.%)合金，并使用恒电位仪在1M H3PO4+NaF(0.8wt.%)中形成纳米管。采用电子束物理气相沉积（EB-PVD）方法在纳米管合金上涂覆羟基磷灰石（HA）。通过FE-SEM、EDS、XRD和恒电位仪研究了表面特性和光电化学行为。 Ti-30Nb-3Zr 和 Ti-30Nb-15Zr 合金的显微组织呈现等轴晶组织，β 相晶粒中含有针状 α 相。 Ti-30Nb-15Zr 合金上形成了由小直径纳米管包围的大纳米管，表面高度有序。 HA涂层的Ti-30Nb-15Zr表面具有不规则的表面和具有(211)和(112)晶面的片状颗粒。在紫外线照射的Ti-30Nb-xZr合金中，钝化区的电流密度高于未紫外线照射的Ti-30Nb-xZr合金，而对于纳米管表面，紫外线照射和未紫外线照射的合金之间的电流密度差异并不显着。 HA涂层/纳米管表面在紫外线照射下的Rp值高于其他表面。 HA涂层/纳米管表面的相角接近60-70°。研究表明，光功能化反应很大程度上取决于氧化物表面的结构、羟基磷灰石的结晶度和合金元素。
In this study, photoelectrochemical analysis of bioactive material coated nanotubular surface of Ti–30Nb–xZr alloy has been investigated using a potentiostat and a Xenon lamp. Ternary Ti–30Nb–xZr(x=3, 15wt.%) alloys were prepared, and nanotube was formed using potentiostat in 1M H3PO4+NaF(0.8wt.%). Hydroxyapatite (HA) was coated on nanotubular alloy by electron-beam physical vapor deposition (EB-PVD) method. The surface characteristics and photoelectrochemical behavior were investigated by FE-SEM, EDS, XRD and potentiostat. The microstructures of the Ti–30Nb–3Zr and Ti–30Nb–15Zr alloys showed an equiaxed grain structure with needle-like α phase in the β phase grains. The large nanotubes surrounded by smaller diameter nanotubes were formed with highly ordered surface on the Ti–30Nb–15Zr alloy. HA coated Ti–30Nb–15Zr surface has an irregular surface and flake-like particles with (211) and (112) crystalline planes. In the UV-irradiated Ti–30Nb–xZr alloy, the current density in the passive region was higher than that of non-UV-irradiated Ti–30Nb–xZr alloy, whereas for the nanotube surface the current density difference between UV-irradiated and non-UV-irradiated alloys was not significant. The Rpvalue of HA coated/nanotube surface under UV-irradiation was higher than that of the other surface. The phase angle of HA coated/nanotube surface was close to 60–70°. The study suggested that the photofunctionalization reaction strongly depends on the structure of oxide surface, crystallinity of hydroxyapatite and alloying elements.