| 淬速对Ni-Mn-Ga快淬合金相变的影响 |
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| 引用本文： | 郭世海,张羊换,王国清,祁焱,全白云,王新林.淬速对Ni-Mn-Ga快淬合金相变的影响[J].中国有色金属学报,2005,15(11):1755-1760. |
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| 作者姓名： | 郭世海 张羊换 王国清 祁焱 全白云 王新林 |
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| 作者单位： | 钢铁研究总院,功能材料研究所,北京,100081 |
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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： | 采用快淬技术制备了Ni-Mn-Ga薄带合金,研究了不同淬速对Ni-Mn-Ga快淬合金相变过程的影响.结果表明,快淬合金具有典型的热弹性马氏体相变过程,但合金的马氏体相变开始温度Ms比铸态合金的有所降低,并随淬速的升高,快淬合金的Ms逐渐降低.Ni-Mn-Ga合金马氏体相变的热力学分析表明:快淬合金晶粒愈细小,Ms愈低;快淬工艺不改变合金的晶体结构;在不同淬速的快淬合金中有以(400)晶面为择优取向的织构存在.
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| 关 键 词： | 磁性形状记忆合金 马氏体相变 快淬 |
| 文章编号： | 1004-0609（2005）11-1755-06 |
| 收稿时间： | 2005-07-15 |
| 修稿时间： | 2005-08-20 |
Effect of quenching rate on phase transformation of Ni-Mn-Ga melt-spinning alloys |
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| GUO Shi-hai,ZHANG Yang-huan,WANG Guo-qing,QI Yan,QUAN Bai-yun,WANG Xin-lin.Effect of quenching rate on phase transformation of Ni-Mn-Ga melt-spinning alloys[J].The Chinese Journal of Nonferrous Metals,2005,15(11):1755-1760. |
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| Authors: | GUO Shi-hai ZHANG Yang-huan WANG Guo-qing QI Yan QUAN Bai-yun WANG Xin-lin |
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| Abstract: | Ni-Mn-Ga ribbons were prepared by melt-spinning technology.The effects of quenching rates on phase transformation of Ni-Mn-Ga melt-spinning alloy were investigated.The results show that Ni_(47)Mn_(32)Ga_(21) melt-spun ribbons undergo typical thermal-elastic martensitic transformation and magnetic transition.However,M_s of melt-spun ribbons is lower than that of as-cast alloy and decreases with increasing quenching rate.Based on transformation thermodynamics analysis,the smaller the grain sizes of melt-spun alloys are,the lower the M_s is.The melt-spinning technology does not change the crystal structure of the alloy.There exist obvious textures with(400) crystal plane preferential oriented crystal structure in the melt-spun alloys with different quenching rates. |
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| Keywords: | Ni-Mn-Ga |
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