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Ni50Mn27Ga23快淬薄帶的馬氏體相變和磁感生應(yīng)變
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TG139.6

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國家863計劃新材料領(lǐng)域課題（2001AA327022）;致謝：在本課題的研究過程中,得到了中科院物理所吳光恒老師的幫助,在此表示感謝.


Martensitic Transformation and Magnetic-Field-Induced Strains in Ni50Mn27Ga23 Melt-Spun Ribbons
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    摘要:

    采用快淬技術(shù)制各了非化學(xué)計量成分的Ni50Mn27Ga23多晶薄帶，對快淬薄帶的馬氏體相變和磁感生應(yīng)變進(jìn)行了研究。結(jié)果表明，快淬薄帶侄冷卻和加熱過程中仍然發(fā)牛熱彈性馬氏體相變及逆相變，具有典型的熱彈性形狀記憶效應(yīng)，并且比鑄態(tài)合金具有更大的應(yīng)變，但是馬氏體相變溫度下降。快淬工藝在合金內(nèi)部引入特定的內(nèi)應(yīng)力，使薄帶形成織構(gòu)，是合金獲得更大相變應(yīng)變和磁感卞應(yīng)變的原因。熱處理后，內(nèi)應(yīng)力大大降低，導(dǎo)致磁感牛應(yīng)變降低。

    Abstract:

    The non-stoichiometric Ni50Mn27Ga23 polycrystalline ribbons were prepared by melt-spinning technique. The martensitic transformation and the magnetic-field-induced strain of melt-spun ribbons were investigated. The experimental results show that the ribbons still undergo thermal-elastic martensitic transformation and reverse transformation in cooling and heating process. The melt-spun ribbons exhibit typical thermo-elastic shape memory effect and larger strain than as-cast specimens, but martensitic transformation temperature decreases. The reason which makes melt-spun ribbons have larger martensitic-transformation-strain and magnetic-fieldinduced strain is that the particular internal stress induced by melt-spinning makes a texture form in the melt-spun ribbons. That the internal stress is released strongly by heat treatment results in a decrease of the magnetic-field-induced strain.

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郭世海 張羊換 李健靚 祁焱 全白云 王新林. Ni50Mn27Ga23快淬薄帶的馬氏體相變和磁感生應(yīng)變[J].稀有金屬材料與工程,2005,34(8):1217~1220.[Guo ShiHai;Zhang YangHuan;Li JianJing;Qi Yan;Quan BaiYun;Wang XinLin. Martensitic Transformation and Magnetic-Field-Induced Strains in Ni50Mn27Ga23 Melt-Spun Ribbons[J]. Rare Metal Materials and Engineering,2005,34(8):1217~1220.]
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  • 收稿日期:2003-12-15
  • 最后修改日期:2004-12-28
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