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%.
基金
financially supported by the Natural Science Foundation of Beijing(No.2132045)
