为研究铟替代部分锗对锰钴锗合金磁结构相变与磁热效应的影响, 采用电弧熔炼方法制备了Mn1Co1Ge1和Mn1Co1Ge0.99In0.01合金, 研究了这两种合金的物相、相变和磁热效应, 以及升、降温测试方式得到的Mn1Co1Ge0.99In0.01合金的磁化曲线。结果表明: 铟替代部分锗后, 合金中并未产生杂相, 其相变特性由二级磁相变变为一级磁结构相变; Mn1Co1Ge0.99In0.01合金在不同的相变方向上具有不同的磁滞后行为; 升温测试时, Mn1Co1Ge0.99In0.01合金在5, 7 T磁场强度下的磁熵变峰值分别为52.2, 64.1 J·kg-1·K-1, 降温测试时的磁熵变峰值分别为40.8, 50.9 J·kg-1·K-1; 升温测试时, Mn1Co1Ge0.99In0.01合金在7 T磁场强度下的制冷能力为477 J·kg-1, 降温测试时为264.4 J·kg-1。
所属栏目
材料性能及其应用国家自然科学基金青年科学基金资助项目(11504222);陕西省教育厅专项科研计划项目(15JK1111)
收稿日期
2015/9/132016/3/10
作者单位
包立夫:陕西理工学院物理与电信工程学院, 汉中 723000
武荣荣:中国科学院物理研究所, 磁学国家重点实验室, 北京 100190
张虎:北京科技大学材料科学与工程学院, 北京 100083
备注
包立夫(1985-), 男, 辽宁沈阳人, 讲师, 博士。
引用该论文:
BAO Li-fu,WU Rong-rong,ZHANG Hu.Influence of In-substitution for Partial Ge on Magneto-Structural Transition and Magnetocaloric Effect of MnCoGe Alloy[J].Materials for mechancial engineering,2016,40(5):67～71
包立夫,武荣荣,张虎.铟替代部分锗对锰钴锗合金磁结构相变及磁热效应的影响[J].机械工程材料,2016,40(5):67～71
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