| 定向凝固Ni_(47)Mn_(32)Ga_(21)多晶合金的结构、相变及磁特性 |
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| 引用本文： | 蔡培阳,冯尚申,薛双喜,陈卫平,周英,吴建波,王古平.定向凝固Ni_(47)Mn_(32)Ga_(21)多晶合金的结构、相变及磁特性[J].中国有色金属学报,2011(11). |
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| 作者姓名： | 蔡培阳 冯尚申 薛双喜 陈卫平 周英 吴建波 王古平 |
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| 作者单位： | 台州学院物理与电子工程学院; |
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| 基金项目： | 浙江省科技厅重点项目(2006C21085); 台州市科技计划项目(08KY11) |
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| 摘 要： | 采用定向凝固方法制备了Ni47Mn32Ga21多晶合金,通过XRD谱和金相照片研究合金的结构,通过对合金磁化强度与温度关系、电阻与温度关系、磁化曲线和磁感生应变曲线的测量分析,研究了合金的相变、磁化特性及磁感生应变特性。结果表明:Ni47Mn32Ga21合金在室温(298K)时为四方结构马氏体相,晶格参数a=b=0.593 8 nm,c=0.553 1 nm。合金的马氏体相变起始温度Ms和终止温度Mf分别为309 K和295 K,逆马氏体相变起始温度As与终止温度Af分别为306 K和319 K,居里温度TC为365 K。室温无压力下,Ni47Mn32Ga21合金有较好的双向可恢复磁感生应变,其饱和磁感生应变值达到-700×10-6。
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| 关 键 词： | Ni-Mn-Ga合金 定向凝固 马氏体相变 形状记忆合金 磁感生应变 |
Structure,phase transformation and magnetic properties in polycrystalline Ni_(47)Mn_(32)Ga_(21) directionally solidified alloy |
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| CAI Pei-yang,FENG Shang-shen,XUE Shuang-xi,CHEN Wei-ping,ZHOU Ying,WU Jian-bo,WANG Gu-ping.Structure,phase transformation and magnetic properties in polycrystalline Ni_(47)Mn_(32)Ga_(21) directionally solidified alloy[J].The Chinese Journal of Nonferrous Metals,2011(11). |
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| Authors: | CAI Pei-yang FENG Shang-shen XUE Shuang-xi CHEN Wei-ping ZHOU Ying WU Jian-bo WANG Gu-ping |
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| Affiliation: | CAI Pei-yang,FENG Shang-shen,XUE Shuang-xi,CHEN Wei-ping,ZHOU Ying,WU Jian-bo,WANG Gu-ping (School of Physics and Electronic Engineering,Taizhou University,Taizhou 318000,China) |
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| Abstract: | Ni47Mn32Ga21 polycrystalline alloy was prepared by the directional solidification technique.The structure of the alloy were investigated using XRD and metallography methods.The phase-transformation,magnetization properties and magnetic-field-induced strains were also studied through analyzing the magnetization as a function of temperature,the resistance as a function of temperature,magnetization and magnetic field-induced strain curves.The results show that Ni47Mn32Ga21 alloy exhibits martensitic phase of a... |
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| Keywords: | Ni-Mn-Ga alloy directional solidification martensitic transformation shape memory alloy magnetic-field-induced strain |
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