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首页> 外文期刊>Applied Surface Science >The structural and bio-corrosion barrier performance of Mg-substituted fluorapatite coating on 316L stainless steel human body implant
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The structural and bio-corrosion barrier performance of Mg-substituted fluorapatite coating on 316L stainless steel human body implant

机译：镁取代氟磷灰石涂层在316L不锈钢人体植入物上的结构和生物腐蚀防护性能

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摘要

In this study, Mg-substituted fluorapatite coatings were deposited on medical grade AISI 316L stainless steel via sol-gel dip coating method. Phase composition, crystallite size and degree of crystallinity of the obtained coatings were evaluated by X-ray diffraction (XRD) analysis. Fourier transform infrared (FT1R) spectroscopy was also used to evaluate functional groups of the obtained coatings. The surface morphology and cross-section of the final coatings were studied using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy was used to determine elemental chemical composition of the obtained coatings. In order to determine and compare the corrosion behavior of uncoated and Mg-substituted fluorapatite coated 316L stainless steel, electrochemical potentiodynamic polarization tests were performed in physiological solutions at 37± 1 ℃. Moreover, the released metallic ions from uncoated and coated substrates were measured by inductively coupled plasma-optical emission spec-trometry (ICP-OES) within 2 months of immersing in Ringer's solution at 36.5 ± 1 ℃ as an indication of biocompatibility. The results showed that fluoride and magnesium were successfully incorporated into apatite lattice structure and the prepared coatings were nanostructured with crystallinity of about 70%. Obtained coatings were totally crack-free and uniform and led to decrease in corrosion current densities of 316L stainless steel in physiological solutions. In addition, coated sample released much less ions such as Fe, Cr and Ni in physiological media. Therefore, it was concluded that Mg-substituted fluorapatite coatings could improve the corrosion resistance and biocompatibility of 316L stainless steel human body implants.
机译：在这项研究中，通过溶胶-凝胶浸涂法将Mg取代的氟磷灰石涂层沉积在医用级AISI 316L不锈钢上。通过X射线衍射（XRD）分析评价所得涂层的相组成，微晶尺寸和结晶度。傅里叶变换红外（FT1R）光谱也用于评估所得涂层的官能团。使用扫描电子显微镜（SEM）研究了最终涂层的表面形态和横截面，并使用能量色散X射线（EDX）光谱法确定了所得涂层的元素化学组成。为了确定和比较未涂层和镁取代的氟磷灰石涂层的316L不锈钢的腐蚀行为，在生理溶液中于37±1℃下进行了电化学势动力极化试验。此外，在36.5±1℃的林格氏溶液中浸泡2个月内，通过电感耦合等离子体发射光谱法（ICP-OES）测量了未涂覆和涂覆的基材释放的金属离子，这是生物相容性的指标。结果表明，氟化物和镁已成功地掺入磷灰石晶格结构中，并且所制备的涂层是纳米结构的，其结晶度约为70％。所获得的涂层是完全无裂纹和均匀的，并导致在生理溶液中316L不锈钢的腐蚀电流密度降低。此外，涂层样品在生理介质中释放的离子更少，例如铁，铬和镍。因此，可以得出结论，Mg取代的氟磷灰石涂层可以改善316L不锈钢人体植入物的耐腐蚀性和生物相容性。

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  • 来源
    《Applied Surface Science》 |2014年第1期|331-340|共10页
  • 作者

    A.Sharifnabi; M.H.Fathi; B.Eftekhari Yekta; M.Hossainalipour;

  • 作者单位

    Biomaterials Group, Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, 16844, Iran;

    Biomaterials Research Croup, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran,Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran;

    Biomaterials Group, Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, 16844, Iran;

    Biomaterials Group, Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, 16844, Iran;

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  • 正文语种 eng
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  • 关键词

    Mg-substituted fluorapatite; Sol-gel; Dip coating; Corrosion behavior; Ion release; 316L stainless steel;

    机译：镁取代的氟磷灰石;溶胶凝胶浸涂;腐蚀行为;离子释放;316L不锈钢;

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