Fe替代Ni对铸态及快淬态La0.7Mg0.3Co0.45Ni2.55-xFex(x=0-0.4)电极合金循环稳定性的影响
来源期刊：稀有金属材料与工程2009年第6期
论文作者：任慧平 李保卫 张羊换 王新林 吴忠旺 董小平
关键词：La-Mg-Ni system electrode ahoy; substituting Ni with Fe; rapid quenching; cycle stability; structure;
摘 要：The electrode alloys La0.7,Mg0.3Co0.45Ni2.55-xFex (x = 0, 0.1, 0.2, 0.3, 0.4) were prepared by casting and rapid quenching. The influences of the substitution of Fe for Ni on their cycle stabilities as well as their structures were investigated in detail. The re-suits indicate that the substitution of Fe for Ni significantly improves the cycle stability of the alloys, and the positive impact of such a substitution on the cycle stability of the as-quenched alloy is much larger than that of the as-cast. All of the alloys have multiphase structures composed of two major phases, (La, Mg)Ni3 and LaNis, and a residual phase LaNi2. The substitution ofFe forNi helps the formation of a llke amorphous structure in the as-quenched alloy. With the increase of Fe content, the grains in the as-quenched ahoy are significantly refined, and the lattice constants and the cell volumes of the alloys are obviously enlarged.
任慧平1，李保卫1，张羊换2，王新林4，吴忠旺1，董小平2
(1.内蒙古科技大学,内蒙 古包头,014010;
2.钢铁研究总院,北京 100081;
3.内蒙古科技大学,内蒙 古包头 014010;
4.钢铁研究总院,北京,100081;
5.北京科技大学,北京 100083)
摘要:The electrode alloys La0.7,Mg0.3Co0.45Ni2.55-xFex (x = 0, 0.1, 0.2, 0.3, 0.4) were prepared by casting and rapid quenching. The influences of the substitution of Fe for Ni on their cycle stabilities as well as their structures were investigated in detail. The re-suits indicate that the substitution of Fe for Ni significantly improves the cycle stability of the alloys, and the positive impact of such a substitution on the cycle stability of the as-quenched alloy is much larger than that of the as-cast. All of the alloys have multiphase structures composed of two major phases, (La, Mg)Ni3 and LaNis, and a residual phase LaNi2. The substitution ofFe forNi helps the formation of a llke amorphous structure in the as-quenched alloy. With the increase of Fe content, the grains in the as-quenched ahoy are significantly refined, and the lattice constants and the cell volumes of the alloys are obviously enlarged.
关键词:La-Mg-Ni system electrode ahoy; substituting Ni with Fe; rapid quenching; cycle stability; structure;
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