Enhanced oxidation and overheating resistance of the extruded Mg–Zn–Al–Mn magnesium alloy by Calcium addition  

作　　者：Hanieh Yeganeh Ahmad Bahmani Mehrab Lotfpour Mehdi Malekan Masoud Emamy Behzad Nayebi Kwang Seon Shin 

机构地区：[1]School of Metallurgy and Materials Engineering,College of Engineering,University of Tehran,P.O.Box 11155-4563,Tehran,Iran [2]Department of Advanced Materials and Renewable Energies,Iranian Research Organization for Science and Technology,Tehran,Iran [3]Department of Mechanical Engineering,University of Nevada,Reno,Reno,NV 89557,USA [4]Advanced Research and Technology of Magnesium(ARTofMag)Co.,Tehran,Iran [5]Research Institute of Advanced Materials,School of Materials Science and Engineering,Seoul National University,Gwanak-gu,Seoul 08826,Republic of Korea

出　　处：《Journal of Magnesium and Alloys》2023年第4期1276-1291,共16页镁合金学报（英文）

基　　金：the Advanced Research and Technology of Magnesium (ARTofMag) research core for their help and support for this study.

摘　　要：The effects of Ca addition on the microstructure and oxidation properties of a new Mg alloy were studied.The oxidation behavior of the alloys was analyzed by thermal analysis and material characterization of the alloys exposed in flame environment;and both electrical and induction furnaces.Moreover,the surface layers were characterized using field emission scanning electron microscopy,and X-ray diffraction technique.It was found that increasing the Ca addition reduces the grain size and increases the fraction of the secondary phases,and enhances the mechanical properties.Moreover,increasing the Ca contents resulted in the formation of a dense CaO/MgO layer on the surface prohibited the oxygen diffusion and assisted in protection of the substrate against further oxidation.Therefore,ignition temperature was increased from 680℃ to 890℃ after addition of the Ca element.The mechanical properties and ignition behavior of the current materials was compared with the literature which it showed an excellent combination of the properties in the developed alloys.

关 键 词：Mg alloys Oxidation properties Ca addition Microstructure Intermetallic phases 

分 类 号：TG146.22[一般工业技术—材料科学与工程]