Thermal stability,mechanical properties and corrosion behavior of a Mg–Cu–Ag–Gd metallic glass with Nd addition  

作　　者：Guan Wang Cui-Xia Guo Shu-Jie Pang 

机构地区：[1]Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing 100191,China

出　　处：《Rare Metals》2017年第3期183-187,共5页稀有金属（英文版）

基　　金：financially supported by the Natural Science Foundation of Beijing(No.2132045)

摘　　要：By the minor addition of Nb to a Mg-Cu-Ag-Gd alloy,a Mg-Cu-Ag-Gd-Nb bulk metallic glass （BMG） with improved thermal stability and corrosion resistance as well as good mechanical properties was developed.Mg54Cu26.5Ag8.5Gd11-xNbx （x=0,1） BMGs with a diameter of 2 mm were fabricated by copper-mold casting.The Mg54Cu26.5Ag8.5Gd10Nb1 BMG exhibits enlarged supercooled liquid region of 58 K.Electrochemical measurements indicate that the addition of Nb improves the corrosion resistance of the Mg-based BMG in NaCl solution evidenced by the increased corrosion potential,though no significant effect of Nb on the corrosion behavior of the BMG in NaOH solution is observed.The Mg-Cu-Ag-Gd-Nb BMG also shows high compressive strength up to 890 MPa and elastic strain of about 1.9%.By the minor addition of Nb to a Mg-Cu-Ag-Gd alloy,a Mg-Cu-Ag-Gd-Nb bulk metallic glass （BMG） with improved thermal stability and corrosion resistance as well as good mechanical properties was developed.Mg54Cu26.5Ag8.5Gd11-xNbx （x=0,1） BMGs with a diameter of 2 mm were fabricated by copper-mold casting.The Mg54Cu26.5Ag8.5Gd10Nb1 BMG exhibits enlarged supercooled liquid region of 58 K.Electrochemical measurements indicate that the addition of Nb improves the corrosion resistance of the Mg-based BMG in NaCl solution evidenced by the increased corrosion potential,though no significant effect of Nb on the corrosion behavior of the BMG in NaOH solution is observed.The Mg-Cu-Ag-Gd-Nb BMG also shows high compressive strength up to 890 MPa and elastic strain of about 1.9%.

关 键 词：Mg-based alloy Metallic glass THERMALSTABILITY Mechanical properties Corrosion resistance 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG142.71[金属学及工艺—合金]