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Nitinol Modified by Calcium Phosphate Coatings Prepared by Sol-Gel and Electrodeposition Methods

机译：溶胶-凝胶法和电沉积法制备磷酸钙涂层的镍钛诺

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摘要

Titanium and its alloys, such as Nitinol, are preferred materials for load-bearings implants and the properties of the implant surface are important variable in implant design. In this work, surface of Nitinol was modified by calcium phosphate (CaP) coatings using the electrochemically assisted deposition and sol-gel method. Chronoamperometry was used for in situ study of initial step of electrodeposition process of an acid CaP (brushite film) that occurs via 3D progressive nucleation and growth mechanism. Electrodeposited film was converted to hydroxyapatite coating (HA) by acid-base reaction. The Nitinol surface was characterized using field emission scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). CaP coatings deposited on the Nitinol surface by electrochemically assisted process were more macroscopically homogenous with good internal cohesion and lower residual stresses in the coating and provide better adhesion to the implant surface in comparison to the sol-gel deposited CaP coatings.
机译：钛及其合金（例如镍钛诺）是承重植入物的首选材料，并且植入物表面的特性是植入物设计中的重要变量。在这项工作中，使用电化学辅助沉积和溶胶-凝胶法通过磷酸钙（CaP）涂层对镍钛诺的表面进行了改性。计时电流分析法用于通过3D渐进式成核和生长机理发生的酸性CaP（硬硅酸膜）电沉积过程的初始步骤的原位研究。通过酸碱反应将电沉积膜转变为羟基磷灰石涂层（HA）。使用场发射扫描电子显微镜（SEM），能量色散X射线能谱（EDS）和X射线光电子能谱（XPS）对镍钛诺表面进行了表征。与溶胶-凝胶沉积的CaP涂层相比，通过电化学辅助工艺沉积在镍钛诺表面的CaP涂层在宏观上更均匀，具有良好的内聚力和较低的涂层残余应力，并提供了对植入物表面更好的附着力。

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  • 来源
    《Green electrodeposition 3》|2013年|83-93|共11页
  • 会议地点 Toronto(CA)
  • 作者

    Jozefina Katic; Mirjana Metikos-Hukovic; Ranko Babic;

  • 作者单位

    Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, 10000 Zagreb, Croatia;

    Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, 10000 Zagreb, Croatia;

    Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, 10000 Zagreb, Croatia;

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