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首页> 外文会议>7th International Conference on Electromagnetic Processing of Materials >Solidification of hyper-monotectic Zinc-Bismuth alloy in a strong magnetic field
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Solidification of hyper-monotectic Zinc-Bismuth alloy in a strong magnetic field

机译：强磁场中超单晶锌铋合金的凝固

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摘要

In order to obtain homogenous Zn-Bi hyper-monotectic alloys and investigate what mechanism the magnetic field functions,we carried out the solidification experiments of Zn-4wt％Bi,5wt％Bi,6wt％Bi,7wt％Bi,15wt％Bi and 30wt％Bi alloys under a 18T static magnetic field which was set up in LNCMI.Water quenching was also chosen to further damp the segregation caused by Stokes convection and Marangoni movement.The results indicated that when the content of Bismuth is 5-7wt％,the superimposition of 18Tesla magnetic field can damp the segregation remarkably,and the size of the second phase particles also is decreased.Furthermore,to Zn-4wt％Bi alloy solidified in 18T magnetic field,no spherical bismuth particles are found even magnifying 1000 times by microscope,which hints that the 18T magnetic field may change its solidifying character.To Zn-15wt％Bi and Zn-30wt％Bi alloy,due to their strong segregation trend,the 18T magnetic field still cannot damp the Stokes settlement thoroughly even by quenching way,however,no layered bismuth and zinc appears when compared to 0T,large Bismuth block are formed in the lower half part of the sample.
机译：为了获得均质的Zn-Bi超单晶合金并研究磁场作用的机理，我们进行了Zn-4wt％Bi，5wt％Bi，6wt％Bi，7wt％Bi，15wt％Bi和在LNCMI中建立了30wt％Bi合金，在18T静磁场下进行了选择。还选择了水淬处理以进一步抑制斯托克斯对流和Marangoni运动引起的偏析。结果表明，当铋含量为5-7wt％时， 18Tesla磁场的叠加可以显着抑制偏析，并且第二相颗粒的尺寸也减小。此外，在18T磁场中凝固的Zn-4wt％Bi合金中，甚至没有球状铋颗粒被放大1000倍。在显微镜下，这表明18T磁场可能会改变其凝固特性。对于Zn-15wt％Bi和Zn-30wt％Bi合金，由于它们强烈的偏析趋势，即使通过淬火，其18T磁场仍然不能完全抑制斯托克斯沉降。 wa y，但是，与0T相比，没有层状的铋和锌出现，在样品的下半部分形成了较大的铋块。

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