Effect of sample radius on stability of electromagnetic levitation melting^①

来源期刊：中南大学学报(英文版)2004年第1期

论文作者：马伟增 郑红星 季诚昌 李建国

文章页码：31 - 35

Key words：electromagnetic levitation melting; stable levitation zone; perturbation; (TbDy)Fe2alloy

Abstract: Based on the power dissipating model of spherical sample in free convection gas medium and the expression of input power, the model of temperature calculation for electromagnetic levitation melting sample was established. Considering the limitation of levitation force and levitation sample temperature,the principle of stability levitation zone computation was determined. A spherical sample (ThDy)Fe2under the protection of argon gas was examined, and the effect of radius of levitation sample and perturbation on the stable levitation zone was investigated. The results show that longitudinal per turbation and transverse perturbation can shorten the length of stable levitation zone and the range of levitation sample radius. By increasing the sample radius and weakening the perturbation the electromagnetic levitation melting stability of sample can be improved.