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Synthesis of Mg-Zn-Ca metallic glasses by gas-atomization and their excellent capability in degrading azo dyes

机译：气相雾化法合成Mg-Zn-Ca金属玻璃及其优异的降解偶氮染料的能力

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摘要

Mg-Zn-Ca powders of Mg_(63+x)Zn_(32-x)Ca_5 (x = 0,3,7 and 10) with the diameter from 2 μm to 180 μm were synthesized by gas-atomization. The relationship among powder morphology, the composition, glass forming ability, thermal stability, corrosion resistance and the capacity in degrading azo dyes for these powders was investigated. It is shown that fully glass powders with the particle diameter < 150 μm can be atomized for alloys with x ≤ 7. These Mg-Zn-Ca metallic glass powders exhibit remarkably superior corrosion resistance and degradation capacity in Direct Blue 6 solution to their crystalline counterparts and Fe powders. Nano-whiskers were formed uniformly and loosely on the reacted surface of the Mg_(70)Zn_(25)Ca_5 glassy powder, which is considered as the mechanism of high degrading capacity for these Mg-Zn-Ca glassy alloys. This work will contribute to the development of massive production of high quality metallic glass powders with excellent capability in degrading azo dyes.
机译：通过气雾化合成直径为2μm至180μm的Mg_（63 + x）Zn_（32-x）Ca_5（x = 0,3,7和10）的Mg-Zn-Ca粉。研究了粉末形貌，组成，玻璃形成能力，热稳定性，耐腐蚀性以及这些粉末降解偶氮染料的能力之间的关系。结果表明，对于x≤7的合金，可以将粒径小于150μm的全玻璃粉末雾化。这些Mg-Zn-Ca金属玻璃粉末在Direct Blue 6溶液中的抗腐蚀性能和降解能力明显优于其结晶同类产品。和铁粉。纳米晶须在Mg_（70）Zn_（25）Ca_5玻璃态粉末的反应表面上均匀且疏松地形成，这被认为是这些Mg-Zn-Ca玻璃态合金高降解能力的机理。这项工作将有助于大规模生产具有出色的偶氮染料降解能力的高质量金属玻璃粉末。

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  • 来源
    《Materials Science and Engineering》 |2014年第2期|46-55|共10页
  • 作者

    Y.F. Zhao; J.J. Si; J.G. Song; Q. Yang; X.D. Hui;

  • 作者单位

    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;

    School of Water Resources and Environment, China University of Geoscience, Beijing 100083, China;

    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Azo dyes degradation; Mg-Zn-Ca; Metallic glasses; Gas-atomization;

    机译：偶氮染料降解;Mg-Zn-Ca;金属玻璃;气雾化;

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