| Ni-Mn-Ga磁控形状记忆合金中的马氏体相变 |
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| 引用本文： | 陈小丽,卢斌,武国剑.Ni-Mn-Ga磁控形状记忆合金中的马氏体相变[J].湖南有色金属,2008,24(2):50-52. |
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| 作者姓名： | 陈小丽 卢斌 武国剑 |
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| 作者单位： | 1. 合肥工业大学,安徽,合肥,230009
2. 中南大学,湖南,长沙,410083 |
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| 基金项目： | 合肥工业大学校科研和教改项目 |
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| 摘 要： | 文章采用电弧熔炼法熔炼Ni48Mn31Ga21和Ni2MnGa两种合金，并对这两种合金进行了热处理，借助交流磁化率测定、金相显微镜观察、X射线以及磁化曲线等手段研究了Ni-Mn-Ga磁控形状记忆合金中的马氏体相变。结果表明：（1）Ni48Mn3lGa21合金在室温下发生了马氏体转变，而Ni2MnGa合金在室温下则未发生马氏体转变；（2）室温下Ni2MnGa合金的饱和磁化强度比Ni48Mn3lGa21合金高；对于Ni48Mn31Ga2l合金，其马氏体态的饱和磁化强度要高于奥氏体态。
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| 关 键 词： | 马氏体相变 X射线衍射 饱和磁化强度 |
| 文章编号： | 1003-5540(2008)02-0050-03 |
| 修稿时间： | 2007年11月15 |
Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloys |
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| CHEN Xiao-li,LU Bin,WU Guo-jian.Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloys[J].Hunan Nonferrous Metals,2008,24(2):50-52. |
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| Authors: | CHEN Xiao-li LU Bin WU Guo-jian |
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| Affiliation: | CHEN Xiao-li, LU Bin, WU Guo-jian( 1. Hefei University of Technology, Hefei 230009, China ; 2. Central South University, Changsha 410083, China) |
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| Abstract: | In this paper polycrystalline ingots of Ni48 Mn31 Ga21 and Ni2MnGa alloys were remelted four times by the arc melter with high purity element（99.99% ）under argon atmosphere, and heat treatments were processed in two alloys. The martenisitic transformation in Ni - Mn- Ga alloy was studied by means of ac susceptibility measurements, optical microscope, XRD, magnetization curve and so on. The results indicated： （ 1 ）for Ni48 M n31 Ga21 alloy, martensitic transformation happened at room temperature, while Ni2 MnGa alloy didn＇ t happen; （2） at room temperature, the saturated magnetization intensity of alloy Ni2MnGa is higher than alloy Ni48 Mn31 Ga21; as for NinsMn31 Ga21 ,its saturated magnetization intensity of martensite is higher than autensite. |
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| Keywords: | martenisitic transformation XRD saturated magnetization intensity |
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