Volume 126, Number 4, May 2019
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||24 June 2019|
Effect of steady magnetic field on undercooling of Al-Cu alloy melts
State Key Laboratory of Advanced Special Steel, Shanghai University - Shanghai, 200444, PRC
Received: 21 January 2019
Accepted: 17 May 2019
The undercooling behaviors of three Al-Cu alloy melts in a steady magnetic field (SMF) were investigated by differential thermal analysis. It was found that the nucleation temperatures of primary phases in three alloys gradually shifted to a lower temperature with increasing the SMF intensity, i.e., the undercooling was enhanced in the SMF. The enhanced undercooling mainly results from the increase in the liquid/solid interfacial free energy in the SMF. In addition, the reduction of migration rates of atoms in the liquid phase in the SMF is partially responsible for the increase in undercooling.
PACS: 68.08.De – Liquid-solid interface structure: measurements and simulations / 83.60.Np – Effects of electric and magnetic fields / 64.70.D- – Solid-liquid transitions
© EPLA, 2019
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