Effect of aging on phase transformation and magnetic properties of Mn53Ni25Ga22 ferromagnetic shape memory alloy
Effect of aging on phase transformation and magnetic properties of Mn53Ni25Ga22 ferromagnetic shape memory alloy
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DOI：
10.1016/j.jmmm.2014.08.063
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发表时间：
2015-01
影响因子：
2.7
通讯作者：
G. Dong;Zhanming Gao;J. Sui;W. Cai
中科院分区：
文献类型：
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作者：
G. Dong;Zhanming Gao;J. Sui;W. Cai
对Mn53Ni25Ga22铁磁形状记忆合金在不同温度下时效3 h，采用差示扫描量热法（DSC）和物理性能测试系统（PPMS，Quantum Design）研究了其马氏体相变和磁性能。结果表明，沉淀对马氏体相变温度、居里温度和饱和磁化强度有明显的影响。老化极大地影响转变温度，由于修改的组合物的矩阵。马氏体相变温度、居里温度随时效温度的升高先降低后升高，在773 K时效温度时达到最低值。饱和磁化强度随时效温度的升高先迅速增大后迅速减小，在773 K时达到最大值。结果表明，适当的时效处理可以提高Mn53Ni25Ga22合金的饱和磁化强度。
The Mn53Ni25Ga22ferromagnetic shape memory alloy has been aged at various temperatures for 3 h, and the martensitic transformation and magnetic properties have been investigated by differential scanning calorimetry (DSC) and the Physical Property Measurements System (PPMS, Quantum Design). The results show that precipitation has an obvious effect on martensitic transformation temperatures, Curie temperatures and saturation magnetization. Aging greatly affects transformation temperatures due to modified composition of the matrix. Martensitic transformation temperature, Curie temperatures first decreased and then increased with increase of aging temperature, reaching their minimum values at the aging temperature of 773 K. The saturation magnetizations first rapidly increase and then rapidly decrease with increase of aging temperature, reaching the maximum value at 773 K. It can be concluded that appropriate ageing treatment can enhance the saturation magnetization of Mn53Ni25Ga22alloy.