Sn、Si和C掺杂对MnAl合金相结构及磁性能的影响  

Effect of Sn,Si and C doping on phase structure and magnetic properties of MnAl alloys

作　　者：张耀华 封林 赵春叶 苏昆朋[1] ZHANG Yao-hua;FENG Lin;ZHAO Chun-ye;SU Kun-peng(Department of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学材料与环境工程学院,浙江杭州310018

出　　处：《材料热处理学报》2021年第3期45-52,共8页Transactions of Materials and Heat Treatment

基　　金：浙江省自然科学基金(LY20E040001);国家自然科学基金(51601049)。

摘　　要：研究了Sn、Si和C元素掺杂对低Mn含量MnAl合金的相结构和磁性能的影响。结果表明:Sn元素的掺杂比Si元素的掺杂更容易稳定磁性τ相。C、Sn和C、Si双元素均比单元素掺杂有利于稳定磁性相。随着Mn含量的增加,1100℃热处理后,MnAl合金相结构中出现少量高温ε相,后续再进行500℃热处理,ε相转变成磁性τ相。在Mn_(50)Al_(47)Sn_(3)样品中得到了131.8 emu/g的最大饱和磁化强度,在Mn_(50)Al_(46)Si_(4)C_(3)样品中获得1.63 kOe的最大矫顽力。Effect of Sn,Si,and C elements doping on phase structure and magnetic properties of MnAl alloys with low Mn content was studied.The results show that the doping of Sn element is easier to stabilize the magneticτphase than that of Si element.Compared with single element doping,the doping of both C,Sn and C,Si elements is beneficial to the stable magnetic phase.With the increase of Mn content,there are a few high temperatureεphases in the MnAl alloys phase structure after heat treatment at 1100℃for 16 h,and theεphase is transformed into a magneticτphase after subsequent heat treatment at 500℃for 0.5 h.The maximum saturation magnetization of 131.8 emu/g is obtained in the Mn_(50)Al_(47)Sn_(3) sample,and the maximum coercive force of 1.63 kOe is obtained in the Mn_(50)Al_(46)Si_(4)C_(3) sample.

关 键 词：MnAl合金 热处理 矫顽力 磁性 

分 类 号：TG132.2[一般工业技术—材料科学与工程]