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Improved corrosion resistant and mechanical behavior of distinct composite coatings (silica/titania/zirconia) on Ti–6Al–4V deposited by EPD
Journal of Asian Ceramic Societies ( IF 2.3 ) Pub Date : 2017-09-01 , DOI: 10.1016/j.jascer.2017.06.005
M. Chellappa 1 , U. Vijayalakshmi
Affiliation  

Abstract Synthesized composite powders (ZrO2/TiO2, SiO2/TiO2, and SiO2/ZrO2) were successfully deposited on Ti–6Al–4V by electrophoretic deposition method (EPD) to improve its electrochemical characteristics for better biomedical applications. In the present investigation, the three composite powders were prepared by sol–gel synthesis and its phase purity was analyzed by Powder X-ray diffraction (XRD) method. Further, the performance of the deposited coatings was assessed by scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDAX), scratch resistance test. The electrochemical properties of the composite coatings were analyzed by Potentiodynamic (Tafel) polarization and electrochemical impedance spectroscopy (EIS) studies. From the results, we observed that the corrosion resistance behavior of the different composite coated metallic substrate exhibited divergent corrosion resistance nature than blank Ti–6Al–4V. Of all these coatings on Ti–6Al–4V, the composite made up of, ZrO2/TiO2 has pronounced corrosion resistance behavior in Ringer’s solution when compared to others. This behavior is due to the presence of strong adherent coating owing to the existence of uniform deposition on Ti–6Al–4V.

中文翻译:

EPD 沉积的 Ti-6Al-4V 上不同复合涂层(二氧化硅/二氧化钛/氧化锆)的耐腐蚀性和机械性能得到改善

摘要 通过电泳沉积法 (EPD) 成功地将合成的复合粉末 (ZrO2/TiO2、SiO2/TiO2 和 SiO2/ZrO2) 沉积在 Ti-6Al-4V 上,以改善其电化学特性以更好地应用于生物医学。在本研究中,三种复合粉末通过溶胶-凝胶合成制备,并通过粉末 X 射线衍射 (XRD) 方法分析其相纯度。此外,沉积涂层的性能通过扫描电子显微镜 (SEM) 结合能量色散 X 射线分析 (EDAX)、耐划伤性测试进行评估。通过动电位 (Tafel) 极化和电化学阻抗谱 (EIS) 研究分析了复合涂层的电化学性能。从结果来看,我们观察到不同复合涂层金属基材的耐腐蚀性能表现出与空白 Ti-6Al-4V 不同的耐腐蚀性能。在 Ti-6Al-4V 上的所有这些涂层中,与其他涂层相比,由 ZrO2/TiO2 组成的复合材料在林格溶液中具有显着的耐腐蚀性能。这种行为是由于 Ti-6Al-4V 上存在均匀沉积而存在强附着涂层。
更新日期:2017-09-01
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