Metamagnetic shape memory effect in polycrystalline NiCoMnSn alloy fabricated by spark plasma sintering
Metamagnetic shape memory effect in polycrystalline NiCoMnSn alloy fabricated by spark plasma sintering
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DOI：
10.1016/j.scriptamat.2009.05.008
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发表时间：
2009-09
影响因子：
6
通讯作者：
K. Ito;W. Ito;R. Umetsu;S. Tajima;H. Kawaura;R. Kainuma;K. Ishida
中科院分区：
文献类型：
--
作者：
K. Ito;W. Ito;R. Umetsu;S. Tajima;H. Kawaura;R. Kainuma;K. Ishida
研究了放电等离子烧结Ni43Co7Mn39Sn11多晶样品的马氏体相变和磁性能。在1173K下烧结15min的试样的显微组织中只有少量的气孔，其塑性明显高于常规感应熔炼的合金。烧结试样的马氏体和磁性能与常规块体合金基本相似。在8T的磁场作用下，证实了材料的变磁形状记忆效应，即磁场诱导的形状恢复。
Martensitic transformation and magnetic properties were investigated for Ni43Co7Mn39Sn11polycrystalline specimens obtained using the spark plasma sintering method. The microstructure of the specimen sintered at 1173K for 15min showed only a small number of pores, and the specimen’s ductility was significantly higher than that of alloys fabricated by conventional induction melting. The martensitic and magnetic properties of the sintered specimen were basically similar to those of conventional bulk alloys. The metamagnetic shape memory effect, i.e. magnetic field-induced shape recovery, was confirmed by the magnetic field of 8T.