| Effects of Sm on Phase Transformation in Ni-Mn-Ga Alloys |
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| 作者姓名： | 郭世海 张羊换 赵增祺 祁焱 全白云 王新林 |
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| 作者单位： | [1]DepartmentofFunctionalMaterialResearch,CentralIronandSteelResearchInstitute,Beijing100081,China [2]BaotouResearchInstituteofRareEarth,Baotou014010,China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The effects of small amount additions of Sm on the martensitic transition and magnetic phase transition of polycrystalline Ni-Mn-Ga alloys were investigated. The experimental results show that the Sm doped alloys also undergo a thermal-elastic martensitic transformation and reverse transformation during cooling and heating process and the addition of Sm decreases the martensitic transformation temperature and Curie temperature in different degree respectively. Ni-Mn-Ga alloys of adding Sm still possess Heusler structure, but their crystal lattice parameters are modified slightly. The addition of a proper amount of Sm does not basically decrease Tc of the alloy when avoiding the appearance of second phase. In addition, the doped alloys have favorable toughness because of grain refinement of Sm.
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| 关 键 词： | 镍-锰-镓合金 形状记忆合金 马氏体 相位变换 铁磁体 稀土元素 |
Effects of Sm on Phase Transformation in Ni-Mn-Ga Alloys |
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| Guo Shihai.Effects of Sm on Phase Transformation in Ni-Mn-Ga Alloys[J].Journal of Rare Earths,2004,22(6):875-877. |
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| Authors: | Guo Shihai |
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| Affiliation: | Guo Shihai~ |
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| Abstract: | The effects of small amount additions of Sm on the martensitic transition and magnetic phase transition of polycrystalline Ni-Mn-Ga alloys were investigated. The experimental results show that the Sm doped alloys also undergo a thermal-elastic martensitic transformation and reverse transformation during cooling and heating process and the addition of Sm decreases the martensitic transformation temperature and Curie temperature in different degree respectively. Ni-Mn-Ga alloys of adding Sm still possess Heusler structure, but their crystal lattice parameters are modified slightly. The addition of a proper amount of Sm does not basically decrease Tc of the alloy when avoiding the appearance of second phase. In addition, the doped alloys have favorable toughness because of grain refinement of Sm. |
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| Keywords: | Ni-Mn-Ga alloy shape memory alloy martensitic transformation ferromagnetic phase transformation rare earths |
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