Park Seon-Yeong, Choe Han-Heol
J Nanosci Nanotechnol. 2017 Apr;17(4):2661-665. doi: 10.1166/jnn.2017.13331.
The purpose of this study was to investigate manganese coatings on the hydroxyapatite-deposited Ti–29Nb–xHf alloy after nanomesh formation. The Ti alloy substrates for nanomesh formation were immersed in 5 M NaOH aqueous solution at 60 °C for 12 h. Electrochemical deposition of HA was carried out using cyclic voltammetry at 80 °C in 2.5 mM Ca(NO3)2 + 1.5 mM NH4H2PO4. The manganese coating was obtained by a radio frequency magnetron sputtering technique. The microstructure, composition, and phase structure of the coated alloys were examined by optical microscopy, field emission scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. The microstructures of the Ti–29Nb–xHf alloys were changed from an α″ + β phase to a β phase, and needle-like structure to equiaxed structure with Hf content. The bulk surfaces of Ti–29Nb alloy were partially covered with a rod-like hydroxyapatite layer and exhibited rod-like and round edge shape. In contrast, the hydroxyapatite coating after mesh formation on the Ti–29Nb–15Hf alloy showed plate-like precipitates. Manganese coatings on the Ti–29Nb–xHf alloys with mesh formation exhibited rod-like particles at the tip of plate-like precipitates by RF-sputtering. The Ca/P ratios of the coatings were 1.4 and 1.68 without and with mesh formation, respectively.
本研究的目的是研究在形成纳米网后的羟基磷灰石沉积的Ti–29Nb–xHf合金上的锰涂层。用于形成纳米网的Ti合金基底在60℃的5M NaOH水溶液中浸泡12小时。在80℃下于2.5mM Ca(NO3)2 + 1.5mM NH4H2PO4中使用循环伏安法进行HA的电化学沉积。通过射频磁控溅射技术获得锰涂层。通过光学显微镜、场发射扫描电子显微镜、X射线衍射和能量色散X射线光谱对涂层合金的微观结构、成分和相结构进行了研究。Ti–29Nb–xHf合金的微观结构从α″ + β相转变为β相，并且随着Hf含量的增加，针状结构转变为等轴结构。Ti–29Nb合金的基体表面部分覆盖有棒状羟基磷灰石层，并呈现出棒状和圆形边缘形状。相比之下，在Ti–29Nb–15Hf合金上形成网后的羟基磷灰石涂层显示出板状沉淀。通过射频溅射在具有网结构的Ti–29Nb–xHf合金上的锰涂层在板状沉淀的尖端处呈现出棒状颗粒。涂层的Ca/P比在未形成网和形成网时分别为1.4和1.68。
