Abstract

This work deals mainly with the influence of nano titanium dioxide with addition of nano hydroxyapatite to get more adhesive coatings on 316L stainless steel by the electrophoretic deposition method. An adherent thin nano composite coating was obtained on a metal surface at 30 V and 2 minutes sintering at 700°C. The surface morphology and surface topography were characterized by X-ray diffraction, field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy, and surface profilometry, respectively. The adhesion strength of the composite coatings was evaluated using a tape test method, and mechanical strength was measured by the Vickers microhardness test. Further, the corrosion behavior of the coated and uncoated samples was tested in Hank’s solution using electrochemical impedance spectroscopy and cyclic potentiodynamic polarisation studies. In vitro analyses were carried out with MC3T3-E1 osteoblast cells. The nano composite coated sample exhibited higher adhesion, enhanced corrosion resistance with improved cell attachment and more cells proliferation compared to those of the uncoated sample, the protective layer of the former controlling the release of metal ions into the biological system.

中文翻译：

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用于骨植入物的 316L 不锈钢表面生物相容性纳米复合涂层

摘要

本工作主要研究了纳米二氧化钛与纳米羟基磷灰石的加入对通过电泳沉积法在316L不锈钢上获得更多粘合涂层的影响。在 30 V 和 700°C 下烧结 2 分钟，在金属表面上获得了粘附的薄纳米复合涂层。表面形貌和表面形貌分别通过 X 射线衍射、场发射扫描电子显微镜与能量色散 X 射线光谱法和表面轮廓仪进行表征。复合涂层的附着强度采用胶带试验法进行评价，机械强度采用维氏显微硬度试验测定。更多，使用电化学阻抗谱和循环动电位极化研究在汉克溶液中测试了涂层和未涂层​​样品的腐蚀行为。用 MC3T3-E1 成骨细胞进行体外分析。与未涂层样品相比，纳米复合涂层样品表现出更高的粘附性、增强的耐腐蚀性、改善的细胞附着和更多的细胞增殖，前者的保护层控制金属离子释放到生物系统中。