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The effect of the existing state of Y on high temperature oxidation properties of magnesium alloys

机译：Y的存在状态对镁合金高温氧化性能的影响

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摘要

This paper studies the effect of the existing state of Y element on the high temperature oxidation resistance of magnesium alloys. Different levels of Al element were added into Mg-2.5Y alloy to obtain different existing state of Y. The oxidation rate of Mg-2.5Y-2.5Al alloy is the highest among Mg-2.5Y, Mg-2.5Y-2.5Al and Mg-2.5Y-4.2Al alloys at 500 degrees C. An effective and protective Y2O3/MgO composite oxide film was formed on the surface of Mg-2.5Y alloy after oxidized at 500 degrees C for 360 min. The results show that the dissolved Y element in the matrix was beneficial to improve the oxidation resistance of magnesium alloys. Once Y element transformed to the high temperature stable Al2Y compound, its ability in preventing oxidation would disappear. The formation of Al2Y compound severely deteriorated the oxidation resistance of Mg-2.5Y alloy. In addition, the dissolved Al can also cause the rise of oxidation resistance at a certain extent. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文研究了Y元素的存在状态对镁合金高温抗氧化性能的影响。在Mg-2.5Y合金中添加不同含量的Al元素可获得不同的Y存在状态。Mg-2.5Y-2.5Al合金中Mg-2.5Y-2.5Al合金的氧化速率最高。 Mg-2.5Y-4.2Al合金在500摄氏度下进行氧化。在500摄氏度下氧化360分钟后，在Mg-2.5Y合金表面形成了有效的保护性Y2O3 / MgO复合氧化物膜。结果表明，基体中溶解的Y元素有利于提高镁合金的抗氧化性能。一旦Y元素转变为高温稳定的Al2Y化合物，其防止氧化的能力就会消失。 Al 2 Y化合物的形成严重降低了Mg-2.5Y合金的抗氧化性。另外，溶解的Al也会在一定程度上引起抗氧化性的提高。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第may1期|357-363|共7页
  • 作者

    Yu Xiaowen; Shen Shijun; Jiang Bin; Jiang Zhongtao; Yang Hong; Pan Fusheng;

  • 作者单位

    Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;

    Shanghai Aerosp Equipment Manufacturer, Shanghai 200245, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China|Chongqing Acad Sci & Technol, Chongqing 401123, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China|Chongqing Univ Arts & Sci, Res Inst New Mat Technol, Chongqing 402160, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China|Chongqing Acad Sci & Technol, Chongqing 401123, Peoples R China;

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

    Mg-2.5Y; Al; High temperature oxidation; Al2Y; Oxide film;

    机译：Mg-2.5Y;Al;高温氧化;Al2Y;氧化膜;

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