Solidification of Hyper-Monotectic Zinc-Bismuth Alloy in a Strong Magnetic Field

作     者：ZHONG Yun-bo WANG Jiang ZHENG Tian-xiang F.Debray Y.Fautrelle 

作者机构：Shanghai University LNCMICNRS/UJF/INSA/UPS38042 GrenobleFrance SIMAPEPMCNRSGrenobleFrance 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2012年第19卷第S1期

页      面：282-285页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Item Sponsored by National Science Foundation of China (No.50974085 No.51034010) Development Foundation for Talents in Shanghai (No.2009046) National High-tech R&D Program of China (No.2009AA03Z109) Key Research and Innovation Program from Shanghai Municipal Education Commission (No.09zz98) Key Project from Science and Technology Commission of Shanghai Municipality (No:09dz1206401 09dz1206402) EuroMagNET under the EU contract n 228043 

主　　题：strong magnetic field hyper-monotectic alloy segregation microstructure 

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 *** quenching was also chosen to further damp the segregation caused by Stokes convection and Marangoni *** 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 ***,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 *** 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.