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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Electrophoretic enhanced micro arc oxidation of ZrO_2-HAp-TiO_2 nanostructured porous layers
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Electrophoretic enhanced micro arc oxidation of ZrO_2-HAp-TiO_2 nanostructured porous layers

机译：ZrO_2-HAp-TiO_2纳米多孔层的电泳增强微弧氧化

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Micro arc oxidation (MAO) and electrophoretic deposition (EPD) processes were simultaneously employed to grow ZrO_2-HAp-TiO_2 porous layers on titanium substrates under different conditions. Influence of the electrolyte composition and the growth time on surface morphology, topography, phase structure, and stoichiometry of the layers was investigated. The utilized electrolytes consisted of 3-glycerophosphate, calcium acetate, sodium phosphate, and micron sized yttria-stabilized zirconia with different concentrations. AFM and SEM evaluations revealed a rough surface with a porous structure with a pores size of 50-750 nm. The pores size increased with the time and the electrolyte concentration. Based on the XRD and XPS results, the layers consisted of anatase, hydroxyapatite, monoclinic ZrO_2, tetragonal ZrO_2, ZrO, CaTiO_3, and α-TCP phases whose fractions were observed to change depending on the synthesis conditions. The average crystalline size of the HAp phase was determined as ～54nm. The nano-sized zirconia particles (d = 20-60 nm) were dispersed not only on surface, but also in depth of the layers. Utilizing thicker electrolytes and prolonging the growth time resulted in decomposition of hydroxyapatite as well as tetragonal ZrO_2 to monoclinic ZrO_2. EDX results also showed that the zirconium wt% in the layers increased with the time. EPD-enhanced MAO (EEMAO) technique was expressed as an efficient route to fabricate ZrO_2-HAp-TiO_2 multiphase systems within short times and only in one step.
机译：同时采用微弧氧化（MAO）和电泳沉积（EPD）工艺在不同条件下在钛基底上生长ZrO_2-HAp-TiO_2多孔层。研究了电解质组成和生长时间对层的表面形态，形貌，相结构和化学计量的影响。所用的电解质由3-甘油磷酸，乙酸钙，磷酸钠和微米尺寸的氧化钇稳定的氧化锆组成，并具有不同的浓度。 AFM和SEM评估显示出具有多孔结构的粗糙表面，其孔径为50-750nm。孔尺寸随时间和电解质浓度而增加。基于XRD和XPS结果，该层由锐钛矿，羟基磷灰石，单斜晶ZrO_2，四方ZrO_2，ZrO，CaTiO_3和α-TCP相组成，观察到其分数随合成条件而变化。 HAp相的平均晶体尺寸确定为〜54nm。纳米级氧化锆颗粒（d = 20-60 nm）不仅分散在表面，而且分散在层的深度。使用较厚的电解质并延长生长时间会导致羟基磷灰石以及四方ZrO_2分解为单斜ZrO_2。 EDX结果还表明，层中锆的重量％随时间增加。 EPD增强的MAO（EEMAO）技术被表达为在短时间内且仅一步之遥即可制造ZrO_2-HAp-TiO_2多相系统的有效途径。

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