Effects of Cu and Zr on the formation and thermal stability of Al-Ni-Zr-Cu-Y amorphous alloy

摘要

Al_(85)Ni_(10)Zr_3Y_2 and Al_(80)Ni_(10)Zr_(8-x)Cu_Xy_2 (x=1,2,3,5) alloy ribbons had been prepared by single roller melt-spinning process under vacuum conditions. The ribbons were investigated by X-ray diffraction and differential scanning calorimetry (DSC). The results revealed the strong effect of content of Cu, Zr elements on the glass forming ability and the thermal stability of the alloys. The formation of amorphous alloys are sensitive to contents of these two elements. The completely amorphous alloy or the primary amorphous phase alloy can be obtained when the content of Cu or Zr reach an optimization, otherwise only gaining crystal phase. Al_(80)Ni_(10)Zr_7Cu_1Y_2 and Al_(80)Ni_(10)Zr_3Cu_5Y_2 alloys possess the excellent glass forming ability, which can form the completely amorphous alloy or the composite material of the partial crystal in remaining amorphous.