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首页> 美国卫生研究院文献>Materials >Magnetron-Sputtered Biodegradable FeMn Foils: The Influence of Manganese Content on Microstructure Mechanical Corrosion and Magnetic Properties
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Magnetron-Sputtered Biodegradable FeMn Foils: The Influence of Manganese Content on Microstructure Mechanical Corrosion and Magnetic Properties

机译：磁控溅射可生物降解的FeMn箔：锰含量对组织机械腐蚀和磁性的影响

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摘要

FeMn alloys show a great potential for the use as a biodegradable material for medical vascular implants. To optimize the material properties, with respect to the intended application, new fabrication methods also have to be investigated. In this work different Fe–FeMn32 multilayer films were deposited by magnetron sputtering. The deposition was done on a substrate structured by UV lithography. This technique allows the fabrication of in-situ structured foils. In order to investigate the influence of the Mn content on the material properties foils with an overall Mn content of 5, 10, 15, and 17 wt % were fabricated. The freestanding foils were annealed post-deposition, in order to homogenize them and adjust the material properties. The material was characterized in terms of microstructure, corrosion, mechanical, and magnetic properties using X-ray diffraction, electron microscopy, electrochemical polarization, immersion tests, uniaxial tensile tests, and vibrating sample magnetometry. Due to the unique microstructure that can be achieved by the fabrication via magnetron sputtering, the annealed foils showed a high mechanical yield strength (686–926 MPa) and tensile strength (712–1147 MPa). Owing the stabilization of the non-ferromagnetic ε- and γ-phase, it was shown that even Mn concentrations of 15–17 wt % are sufficient to distinctly enhance the magnetic resonance imaging (MRI) compatibility of FeMn alloys.
机译：FeMn合金显示出用作医用血管植入物的可生物降解材料的巨大潜力。为了针对预期应用优化材料性能，还必须研究新的制造方法。在这项工作中，通过磁控溅射沉积了不同的Fe–FeMn32多层膜。沉积在通过UV光刻构造的基板上完成。该技术允许原位结构化箔的制造。为了研究Mn含量对材料性能的影响，制造了总Mn含量为5、10、15和17wt％的箔。将独立式箔在沉积后进行退火，以使其均质并调整材料性能。使用X射线衍射，电子显微镜，电化学极化，浸没测试，单轴拉伸测试和振动样品磁强分析法对材料的微观结构，腐蚀，机械和磁性进行了表征。由于通过磁控溅射制造可以实现独特的微观结构，退火后的箔片显示出很高的机械屈服强度（686–926 MPa）和拉伸强度（712–1147 MPa）。由于非铁磁ε相和γ相的稳定性，结果表明，即使浓度为15-17 wt％的Mn也足以明显增强FeMn合金的磁共振成像（MRI）相容性。

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