Reexaminations of the effects of magnetic field on the nucleation of undercooled Cu melt

Reexaminations of the effects of magnetic field on the nucleation of undercooled Cu melt
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磁场对过冷铜熔体形核影响的再检验

DOI:
10.7567/jjap.55.105601
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发表时间:
2016-09
影响因子:
1.5
通讯作者:
Beaugnon, Eric
Beaugnon, Eric
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
He, Yixuan;Li, Jinshan;Kou, Hongchao;Beaugnon, Eric

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在12t超导体磁体中采用玻璃渣助熔剂技术,研究了高静磁场对过冷铜熔体成核的影响。在有磁场和无磁场的情况下进行了控制加热循环,结果表明磁场对过冷铜液的平均过冷度没有单一的影响,这与以往的报道不同。高静磁场对铜的过冷性有促进作用,随着加热循环次数的增加,作用逐渐减弱。经过一定次数的加热循环后,无论磁场大小,过冷铜在250k左右达到饱和状态。根据磁场对过冷熔体的热力学和磁流体动力学效应以及非均相成核理论,对这些效应进行了解释。
The effect of a high static magnetic field on the nucleation of an undercooled Cu melt has been investigated using a glass slag fluxing technique in a 12 T superconductor magnet. Controlled heating cycles with and without a magnetic field are performed and the results indicate that the magnetic field has no single effect on the mean undercooling of undercooled Cu liquid, which is different from previous reports. The high static magnetic field can enhance the undercooling of Cu at first, and the effect is weakened with increasing number of heating cycles. The undercooling of undercooled Cu is saturated at around 250 K regardless of the magnetic field after a certain number of heating cycles. The effects are interpreted on the basis of the thermodynamic and magnetohydrodynamic effects of the magnetic field on the undercooled melt and the heterogeneous nucleation theory.
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发表时间: 2015-06
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