Effect of axial magnetic field on the shape of copper ribbon crystal grown by Czochralski method

Zhe Shen (1) , Yunbo Zhong (1) , Licheng Dong (1) , Lijun Fan (1) , Huai Wang (1) , Chuanjun Li (1) , Weili Ren (1) , Zuosheng Lei (1) , Zhongming Ren (1)

1 Key Laboratory of Modern Metallurgy and Material Processing

During the process of growing ribbon crystal by Czochralski method, Turbulent convection in copper melt was effectively suppressed by applying an axial magnetic field (magnetic induction B≤57mT). The changes of thermal fluctuation and flow field were measured and modeled. With the magnetic field increased gradually (from 0 to 57mT), the shape of ribbon crystal became regularly wider. We concluded that the axial magnetic field could promote to form a suitable temperature field for ribbon crystal growth by restraining thermal fluctuation and convection.

Mots clés: axial magnetic field; ribbon crystal; crystal morphology; Czochralski

Domaines: Sciences de l'ingénieur [physics]

Zhe Shen, Yunbo Zhong, Licheng Dong, Lijun Fan, Huai Wang, et al.. Effect of axial magnetic field on the shape of copper ribbon crystal grown by Czochralski method. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01331662⟩