熔盐电解制备Mg-Zn-Sr三元合金及其组织分析
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摘要
以Mg-33%Zn(质量分数)合金为阴极,石墨为阳极,在740℃的KCl-SrCl2熔盐体系中进行液态阴极合金化法电解,并在670℃浇铸反应液制备Mg-ZnSr合金。浇铸产物车削加工后取样,分别进行X射线荧光分析(XRF)、金相分析(OM)、扫描电镜形貌分析(SEM)、能谱分析(EDS)及X射线衍射分析(XRD),并与阴极合金组织进行比较。结果表明,实验成功制备了Mg-Zn-Sr三元合金,Sr的质量分数为1.6279%,且Sr细化了阴极合金的组织。对比熔炼制备的MgZn-Sr合金组织,电解的Sr具有更好的细化效果。
Using Mg-33wt% Zn alloys as the cathode,graphite as anode,to conduct electrolysis by liquid cathode alloying in KCl-SrCl2melts at 740 ℃,and casting the reaction liquid at 670 ℃ to prepare the Mg-Zn-Sr alloys. After cutting the casting product into standard specimens,the samples were analyzed by means of X-ray fluorescence,optical micrograph( OM),scanning electron microscopy( SEM),energy dispersive spectrometry( EDS) and X-ray diffraction( XRD),and compared with the cathode alloys. The results show that the reaction prepared Mg-Zn-Sr ternary alloys successfully,the mass fraction of Sr was 1. 6279%,and Sr refine the cathode alloys. Compared to the microstructures of molten Mg-Zn-Sr alloys,and found that the electrolytic Sr can refine microstructures better.
Using Mg-33wt% Zn alloys as the cathode,graphite as anode,to conduct electrolysis by liquid cathode alloying in KCl-SrCl2melts at 740 ℃,and casting the reaction liquid at 670 ℃ to prepare the Mg-Zn-Sr alloys. After cutting the casting product into standard specimens,the samples were analyzed by means of X-ray fluorescence,optical micrograph( OM),scanning electron microscopy( SEM),energy dispersive spectrometry( EDS) and X-ray diffraction( XRD),and compared with the cathode alloys. The results show that the reaction prepared Mg-Zn-Sr ternary alloys successfully,the mass fraction of Sr was 1. 6279%,and Sr refine the cathode alloys. Compared to the microstructures of molten Mg-Zn-Sr alloys,and found that the electrolytic Sr can refine microstructures better.
引文
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[4]Horie,Toshio,Iwahori,et al.Creep properties of Mg-Zn alloy improved by calcium addition[J].Journal of Japan Institute of Light Metals,1999,49(7):272-276.
[5]Park W W,Jardim P M,You B S,et al.Characterization of Mg-Zn-Ca alloys for high temperature application[C]//Israeli:Proceedings of the Second International Conference on Magnesium Science&Technology,2000.198-202.
[6]Zhang Z,Coutre A.Investigation of the properties of Mg-ZnAl alloys[J].Scripta Materialia,1998,39(1):45-53.
[7]Zhang Z,Tremblay R.Solidification microstructure of ZA102,ZA104 and ZA106 magnesium alloys and its effect on creep deformation[J].Canadian Metallurgical Quarterly,2000,39(4):503-511.
[8]Labelle P,Pekgularyus M,Letebrre M.New aspects of temperature behavior of AJ52X,creep resistant Magnesium alloy[J].SAE Technological Paper,2002,(1):79.
[9]Baril E,Labelle P,Pekgularyus M,et al.Elevated temperature Mg-Al-Sr:creepresistance,mechanical properties,and microstructure[J].JOM,2003,(11):34-41.
[10]Pekgularyus M,Baril E,Labelle P,et al.Magnesium diecasting alloy AJ62X with superior creepresistance,ductility and diecstibility[J].The Minerals,Metals&Materials Society,2003,201-206.
[11]Harpreet S Brar,Joey Wong,Michele V.Manuel.Investigation of the mechanical and degration Properties of Mg-Sr and Mg-Zn-Sr alloys for use as potential biodegradable implant materials[J].Journal of the mechanical behavior of biomedical materials,2012,(7):87-95.
[12]Tang Shouqiu,Zhou Jixue,Tian Changwen,et al.Morphology modification of Mg2Si by Sr addition in Mg-4%Si alloy[J].The Chinese Journal of Nonferrous Metals,2011,(21):1932-1936.
[13]宁旭,谢卫东,马宏,等.AZ31-xSr镁合金微观组织与力学性能[J].稀有金属材料与工程,2011,40(增刊2):265-269.
[14]虞觉奇.二元合金状态图集[M].上海:上海科技出版社,1987.704-705.