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定向生長(zhǎng)Ni50-xMn29+xGa21(x=0~4)合金的相變與磁感生應(yīng)變
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浙江省科技廳重點(diǎn)項(xiàng)目(2006C21085); 臺(tái)州市科技計(jì)劃項(xiàng)目(08KY11)


Phase Transformation and Magnetic-Field-Induced Strain in Ni50-xMn29+xGa21(x=0-4) Alloys
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    摘要:

    采用定向凝固方法制備N(xiāo)i50-xMn29+xGa21(x=0~4)系列多晶合金，并研究合金組分對(duì)馬氏體相變溫度和磁性能的影響。結(jié)果表明，當(dāng)x≤3時(shí)，合金的馬氏體相變溫度Ms隨著x的增大而升高，而馬氏體相變滯后ΔT隨x的增大而減小；當(dāng)x=3時(shí)，Ms升高到309.6 K，居里溫度Tc為360 K；但是隨著合金中Mn繼續(xù)替代Ni，即x=4時(shí)，Ms降低到283.2 K，Tc為362 K。室溫下測(cè)量Ni47Mn32Ga21樣品的磁感生應(yīng)變，無(wú)應(yīng)力下其飽和磁感生應(yīng)變值達(dá)到了–700×10-6，對(duì)應(yīng)的磁場(chǎng)強(qiáng)度為4.5×105 A/m

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    Ni50-xMn29+xGa21(x=0-4) polycrystalline alloys were prepared by the technique of directional solidification and the effect of the component on the martensitic transformation temperature and magnetic properties of the alloys was analyzed. The results show that the martensitic transformation temperatures (Ms) increase and the martensitic transformation hysteresis (ΔT) decrease with increasing of x when x≤3. When x=3, Ms is increased to 309.6 K and the Curie temperature Tc is 360 K. But with x increasing continuously to 4, Ms decreases to 283.2 K and Tc is 362 K. The Ni47Mn32Ga21 alloy exhibits a large saturated magnetic-induced strain of –700×10-6 without stress at room temperature, whose corresponding magnetization intensity is 4.5×105 A/m

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薛雙喜,馮尚申,蔡培陽(yáng),李勤濤,吳建波,周 英,陳衛(wèi)平.定向生長(zhǎng)Ni50-xMn29+xGa21(x=0~4)合金的相變與磁感生應(yīng)變[J].稀有金屬材料與工程,2010,39(10):1764~1768.[Xue Shuangxi, Feng Shangshen, Cai Peiyang, Li Qintao, Wu Jianbo, Zhou Ying, Chen Weiping. Phase Transformation and Magnetic-Field-Induced Strain in Ni50-xMn29+xGa21(x=0-4) Alloys[J]. Rare Metal Materials and Engineering,2010,39(10):1764~1768.]
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  • 收稿日期:2009-10-15
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