Second phase effect on corrosion of nanostructured Mg-Zn-Ca dual-phase metallic glasses

查看全文 作　　者：Chang [1,2]Liu;Qing [1,3]Wang;Bin [1]Han;Junhua [1]Luan;Ji-Jung [1]Kai;Chain-Tsuan [1]Liu;Ge [1,2]Wu;Jian [1,4,5,6]Lu

机构地区：[1]Department of Mechanical Engineering,City University of Hong Kong,Hong Kong,China;[2]Max-Planck-Institut für Eisenforschung,Max-Planck-Straße 1,Düsseldorf,40237,Germany;[3]Laboratory for Microstructures,Institute of Materials Science,Shanghai University,Shanghai 200072,China;[4]Hong Kong Branch of National Precious Metals Material Engineering Research Centre,Department of Material Science and Engineering,City University of Hong Kong,Hong Kong,China;[5]Centre for Advanced Structural Materials,City University of Hong Kong Shenzhen Research Institute,Greater Bay Joint Division,Shenyang National Laboratory for Materials Science,Shenzhen 518057,China;[6]CityU-Shenzhen Futian Research Institute,Shenzhen 518045,China

出　　处：《Journal of Magnesium and Alloys》索引2021年第9卷第5期,共10页

基　　金：partially supported by Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone Shenzhen Park Project:HZQB-KCZYB-2020030;Hong Kong Research Grants Council Collaborative Research Fund(Ref.C4026-17 W);Theme-based Research Scheme(Ref.T13402/17-N);funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 958457;supported by the City U grant 9360161 and CRF grant C1027-14E。 摘　　要：Dual-phase metallic glasses(DP-MGs),a special member of the MGs family,often reveal unusual strength and ductility,yet,their corrosion behaviors are not understood.Here,we developed a nanostructured Mg_(57)Zn_(36)Ca_(7)(at.%)DP-MG and uncovered its corrosion mechanism in simulated body fluid(SBF)at the near-atomic scale utilizing transmission electron microscope(TEM)and atom probe tomography(APT).The 10-nm-wide Ca-rich amorphous phases allow oxygen propagation into the DP-MG,resulting in a micrometer thick hydroxides/oxides layer.This dense corrosion layer protects the DP-MG from further corrosion,enabling a corrosion rate that is 77%lower than that of Mg(99.99%purity). 关键词：Magnesium alloys Metallic glass CORROSION Sputtered films TEM APT

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Second phase effect on corrosion of nanostructured Mg-Zn-Ca dual-phase metallic glasses

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