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首页> 外文期刊>Materials Letters >Homogeneous corrosion of high pressure torsion treated Mg-Zn-Ca alloy in simulated body fluid
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Homogeneous corrosion of high pressure torsion treated Mg-Zn-Ca alloy in simulated body fluid

机译：高压扭转处理的Mg-Zn-Ca合金在模拟体液中的均匀腐蚀

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摘要

Magnesium alloys have got extensive attention as biodegradable implant materials due to their biodegradability in the physiological environment and similar elastic modulus to natural bone. But their poor corrosion resistance is a dominant problem that limits their clinical application due to the inhomogeneous distribution of the second phase. Nevertheless, after high pressure torsion (HPT) treatment, the second phase became nano-sized particles and distributed uniformly in grain interiors instead of along grain boundaries. The immersion tests indicated that the HPT-treated sample exhibited homogeneous corrosion resulting from the uniform distribution of the second phase. The results of the potentiodynamic polarization experiments showed that, compared with the as-cast alloy, the corrosion current density of the HPT-treated alloy decreased from 5.3 ×10~(-4) A/cm~2 to 3.3 × 10~(-6) A/cm~2.
机译：镁合金由于其在生理环境中的生物可降解性和与天然骨相似的弹性模量而作为可生物降解的植入物材料受到了广泛的关注。但是由于第二相的不均匀分布，它们的耐腐蚀性差是一个主要问题，限制了它们的临床应用。然而，在高压扭转（HPT）处理之后，第二相变成纳米级颗粒，并均匀地分布在晶粒内部而不是沿着晶界。浸没测试表明，HPT处理过的样品由于第二相的均匀分布而显示出均匀的腐蚀。电位极化实验的结果表明，与铸态合金相比，HPT处理的合金的腐蚀电流密度从5.3×10〜（-4）A / cm〜2降低到3.3×10〜（- 6）A / cm〜2。

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  • 来源
    《Materials Letters》 |2011年第4期|p.691-693|共3页
  • 作者

    J.H. Gao; S.K. Guan; Z.W. Ren; Y.F. Sun; S.J. Zhu; B. Wang;

  • 作者单位

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China;

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China;

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China;

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China,Division of Materials and Manufacturing Science, Osaka University, Osaka 567-0047, Japan;

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China;

    School of Materials Science and Engineering Zhengzhou University, Zhenzhou 450002, PR China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mg-Zn-Ca alloy; High pressure torsion; Corrosion; Microstructure; Simulated body fluid;

    机译：Mg-Zn-Ca合金高压扭转腐蚀微观组织模拟体液;

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