Effect of high magnetic field on nucleation and growth of primary phase in hypoeutectic binary alloys

摘要：

　　The nucleation and growth behaviors of primary Al phase in two hypoeutectic binary alloys of Al-20.8%Cu and Al-3%Ni in high static magnetic fields were investigated with aid of differential thermal analysis(DTA).The DTA curves indicated that the nucleation temperature of primary crystals in two alloys decreased with increase of the magnetic field intensity and their nucleation was retarded in the magnetic field.The dendrite morphology showed that primary dendrites grew from disorderly without the magnetic field to regularly with the field.The retardation of nucleation of primary Al crystals was mainly caused by increase of interfacial free energy.The change in dendrite morphology could be attributed to suppression of melt flows in the magnetic field.

关键词： High magnetic field Nucleation Dendrite growth Differential thermal analysis

作者: LI Chuanjun REN Zhongming REN Weili Ren WU Yuqin

作者单位: School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China College of Electromechanical Engineering,Wuhan Textile University,Wuhan 430073,China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）