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首页> 外文期刊>Applied Surface Science >Effect of parylene C coating on the antibiocorrosive and mechanical properties of different magnesium alloys
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Effect of parylene C coating on the antibiocorrosive and mechanical properties of different magnesium alloys

机译：聚对二甲苯C涂层对不同镁合金的抗生物腐蚀和力学性能的影响

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摘要

In this paper, parylene C coating with the thickness of 2 mu m was deposited on different magnesium alloy substrates (AZ31, WE43 and AZ91). The structure and phase composition of parylene C coating was analysed by Fourier transformed infrared (FTIR) spectroscopy and X-ray diffraction (XRD). In addition, extensive surface characterization was done using atomic force microscopy. The corrosion performance of polymer-coated magnesium alloys was investigated by electrochemical measurements in Hanks' balanced salts solution that simulates bodily fluids at 37 +/- 0.5 degrees C. The depth-dependent mechanical properties including Young's modulus and nanohardness of parylene C films were investigated using nanoindentation technique. The effect of the penetration depth on the properties on nano-and microscale level have been described in detail. The percentage of elastic recovery was used to characterize the elastic properties of the polymeric coatings. The results of XRD showed (020) preferred orientation of the monoclinic unit cell of the alpha phase of parylene C. The parylene C revealed a semicrystalline structure with nanocrystalline blocks of 4.9 nm. The parylene C film shows a uniform surface morphology with a higher roughness level at micro and nanoscales compared to magnesium alloy surfaces. All of the uncoated substrates exhibited a low corrosion resistance compared to the coated samples, indicating that the corrosion resistance of the magnesium alloys could be improved by parylene C coating. The resulting average nanohardness and Young's modulus of the parylene C coatings deposited onto different substrates were in the range of 0.18-0.25 GPa and 4.19-5.14 GPa, respectively. Furthermore, a higher percentage of elastic recovery of the polymer coating indicated a higher elasticity as compared to the magnesium alloy surface. The polymer coating has revealed the ability to recover elastically. Therefore, parylene C coating can not only improve corrosion resistance, but also provide the ability to recover elastically, expanding the potential applications of this material to include various biointerface platforms. (C) 2017 Elsevier B.V. All rights reserved.
机译：在本文中，将厚度为2μm的聚对二甲苯C涂层沉积在不同的镁合金基底（AZ31，WE43和AZ91）上。通过傅里叶变换红外（FTIR）光谱和X射线衍射（XRD）分析聚对二甲苯C涂层的结构和相组成。此外，使用原子力显微镜对表面进行了广泛的表征。通过在Hanks的平衡盐溶液中进行电化学测量，研究了聚合物涂覆的镁合金的腐蚀性能，该溶液在37 +/- 0.5摄氏度下模拟体液。研究了与深度有关的机械性能，包括聚对二甲苯C膜的杨氏模量和纳米硬度使用纳米压痕技术。已经详细描述了渗透深度对纳米级和微米级性能的影响。弹性回复百分数用来表征聚合物涂层的弹性性能。 XRD的结果表明聚对二甲苯C的α相的单斜晶胞的（020）优选取向。聚对二甲苯C显示出具有4.9nm的纳米晶体嵌段的半晶体结构。与镁合金表面相比，聚对二甲苯C膜在微米和纳米级显示出均匀的表面形态，并具有更高的粗糙度。与涂覆样品相比，所有未涂覆的基材均显示出较低的耐腐蚀性，这表明通过聚对二甲苯C涂层可以改善镁合金的耐腐蚀性。沉积在不同基材上的聚对二甲苯C涂层的平均纳米硬度和杨氏模量分别在0.18-0.25 GPa和4.19-5.14 GPa的范围内。此外，与镁合金表面相比，聚合物涂层的较高的弹性回复百分数表明较高的弹性。聚合物涂层显示出具有弹性恢复的能力。因此，聚对二甲苯C涂层不仅可以提高耐腐蚀性，而且还具有弹性恢复的能力，从而将该材料的潜在应用范围扩大到包括各种生物界面平台。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2018年第ptaa期|617-627|共11页
  • 作者

    Surmeneva M. A.; Vladescu A.; Cotrut C. M.; Tyurin A. I.; Pirozhkova T. S.; Shuvarin I. A.; Elkin B.; Oehr C.; Surmenev R. A.;

  • 作者单位

    Natl Res Tomsk Polytech Univ, Ctr Technol, Lenin Ave 43, Tomsk 634050, Russia;

    Natl Res Tomsk Polytech Univ, Ctr Technol, Lenin Ave 43, Tomsk 634050, Russia|Natl Inst Optoelect, 409 Atomistilor St, RO-77125 Magurele, Romania;

    Natl Res Tomsk Polytech Univ, Ctr Technol, Lenin Ave 43, Tomsk 634050, Russia|Univ Politehn Bucuresti, 313 Spl Independentei, RO-60042 Bucharest, Romania;

    GR Derzhavin Tambov State Univ, NanoCtr Nanotechnol & Nanomat, Tambov 392000, Russia;

    GR Derzhavin Tambov State Univ, NanoCtr Nanotechnol & Nanomat, Tambov 392000, Russia;

    GR Derzhavin Tambov State Univ, NanoCtr Nanotechnol & Nanomat, Tambov 392000, Russia;

    Fraunhofer Inst Interfacial Engn & Biotechnol IGB, D-70569 Stuttgart, Germany;

    Fraunhofer Inst Interfacial Engn & Biotechnol IGB, D-70569 Stuttgart, Germany;

    Natl Res Tomsk Polytech Univ, Ctr Technol, Lenin Ave 43, Tomsk 634050, Russia;

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  • 正文语种 eng
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  • 关键词

    Biodegradable alloy; AZ31; WE43 and AZ91 magnesium alloys; Parylene C coating; Corrosion; Nanohardness; Young's modulus; Elasticity;

    机译：可生物降解的合金;AZ31;WE43和AZ91镁合金;聚对二甲苯C涂层;腐蚀;纳米硬度;杨氏模量;弹性;

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