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首页> 外文期刊>Journal of Materials Research >Effect of zinc and rare-earth element addition on mechanical, corrosion, and biological properties of magnesium
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Effect of zinc and rare-earth element addition on mechanical, corrosion, and biological properties of magnesium

机译：锌和稀土元素的添加对镁的机械，腐蚀和生物学特性的影响

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摘要

The present work aims to understand the effect of zinc and rare-earth element addition (i.e., 2 wt% Gd, 2 wt% Dy, and 2 wt% of Gd and Nd individually) on the microstructure evolution, mechanical properties, in vitro corrosion behavior, and cytotoxicity of Mg for biomedical application. The microstructure results indicate that the Mg-Zn-Gd alloy consists of the lamellar long period stacking ordered phase. The electrochemical and immersion corrosion behavior were studied in Hanks balanced salt solution. Enhanced corrosion resistance with reduced hydrogen evolution volume and magnesium (Mg2+) ion release were estimated for the Mg-Zn-Gd alloy as compared to the other two alloy systems. At the early stage of corrosion, formation of the oxide film inhibited the corrosion propagation. However, at the later stages, the breaking of the oxide film leads to shallow pitting mode of corrosion. The ultimate tensile strength of Mg-Zn-Gd-Nd is better than the other two alloys due to the uniform distribution of the Mg12Nd precipitate phase. The moderate strength in the Mg-Zn-Gd alloy is due to the low volume fraction of the secondary phase. The MTT (methylthiazoldiphenyl-tetrazolium bromide) assay study was carried out to understand the cell cytotoxicity on the alloy surfaces. Studies revealed that all three alloys had significant cellular adherence and no adverse effect on cells.
机译：本工作旨在了解锌和稀土元素的添加（即，分别添加2 wt％的Gd，2 wt％的Dy和2 wt％的Gd和Nd）对组织演变，机械性能和体外腐蚀的影响镁在生物医学应用中的行为和细胞毒性。显微组织结果表明，Mg-Zn-Gd合金由层状长周期堆积有序相组成。在Hanks平衡盐溶液中研究了电化学腐蚀和浸没腐蚀行为。与其他两种合金体系相比，Mg-Zn-Gd合金的抗腐蚀性能得到提高，并且析氢量减少，镁（Mg2 +）离子释放降低。在腐蚀的早期阶段，氧化膜的形成抑制了腐蚀的传播。然而，在随后的阶段，氧化膜的断裂导致腐蚀的浅点蚀模式。 Mg-Zn-Gd-Nd的极限拉伸强度比其他两种合金要好，这是因为Mg12Nd沉淀相的分布均匀。 Mg-Zn-Gd合金的强度适中是由于第二相的体积分数较低。进行了MTT（甲基噻唑二苯基溴化四氮唑）测定研究以了解合金表面的细胞毒性。研究表明，所有三种合金均具有明显的细胞粘附性，且对细胞无不良影响。

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  • 来源
    《Journal of Materials Research》 |2018年第20期|3466-3478|共13页
  • 作者

    Kottuparambil Rakesh Rajan; Bontha Srikanth; Rangarasaiah Ramesh Motagondanahalli; Arya Shashi Bhushan; Jana Anuradha; Das Mitun; Balla Vamsi Krishna; Amrithalingam Srinivasan; Prabhu T. Ram;

  • 作者单位

    Natl Inst Technol Karnataka, Dept Mech Engn, Surathkal 575025, India;

    Natl Inst Technol Karnataka, Dept Mech Engn, Surathkal 575025, India;

    Natl Inst Technol Karnataka, Dept Mech Engn, Surathkal 575025, India;

    Natl Inst Technol Karnataka, Dept Met & Mat Engn, Surathkal 575025, India;

    CSIR Cent Glass & Ceram Res Inst, Bioceram & Coating Div, Kolkata 700032, W Bengal, India;

    CSIR Cent Glass & Ceram Res Inst, Bioceram & Coating Div, Kolkata 700032, W Bengal, India;

    CSIR Cent Glass & Ceram Res Inst, Bioceram & Coating Div, Kolkata 700032, W Bengal, India;

    CSIR Natl Inst Interdisciplinary Sci & Technol, Mat Sci & Technol Div, Thiruvananthapuram 695019, Kerala, India;

    Def Res & Dev Org, CEMILAC, Bangalore 560093, Karnataka, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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