摘要
Zr(Mn 0.2 V 0.2 Ni 0.6 ) 2.4 alloy was prepared by using both arc melting and melt spinning processes. The XRD results indicate that the as cast alloy contains two Laves phases, C14 (15.45%) and C15 (76.48%), and the non Laves phase Zr 7M 10 (8.07%, M presents Ni, Mn, V). Meanwhile the melt spun alloy only has the C14 (27.67%) and C15 (69.43%) Laves phases. The electrochemical test indicates that the melt spun alloy has much better cycling stability ( S 500 =90.8%), higher discharge capacity ( C max =347.5 mA·h·g -1 ) than those of as cast alloy ( S 500 =80.9%, C max =340.8 mA·h·g -1 ), although its activation property and high rate dischargeability decrease somewhat. The different electrochemical properties between the melt spun and as cast alloys are resulted from the different phase composition, phase abundance and microstructure.
Zr(Mn 0.2 V 0.2 Ni 0.6 ) 2.4 alloy was prepared by using both arc melting and melt spinning processes. The XRD results indicate that the as cast alloy contains two Laves phases, C14 (15.45%) and C15 (76.48%), and the non Laves phase Zr 7M 10 (8.07%, M presents Ni, Mn, V). Meanwhile the melt spun alloy only has the C14 (27.67%) and C15 (69.43%) Laves phases. The electrochemical test indicates that the melt spun alloy has much better cycling stability ( S 500 =90.8%), higher discharge capacity ( C max =347.5 mA·h·g -1 ) than those of as cast alloy ( S 500 =80.9%, C max =340.8 mA·h·g -1 ), although its activation property and high rate dischargeability decrease somewhat. The different electrochemical properties between the melt spun and as cast alloys are resulted from the different phase composition, phase abundance and microstructure.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第4期926-929,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(863 715 0 0 40060)supportedbytheNationalAdvancedMaterialsCommitteeofChina
关键词
AB2型
储氢合金
显微结构
电化学性能
锆
AB 2 type alloys
melt spun
over stoichiometry
electrochemical properties
microstructure
