Fig. 1. Phase constitution and transition characteristics of quinary Ni₄₀Zr_28.5Ti_16.5Al₁₀Cu₅ alloy: (a) XRD pattern; (b) DSC thermogram; (c) cooling curve at levitated state. 五元Ni₄₀Zr_28.5Ti_16.5Al₁₀Cu₅合金的相组成和相变特征　(a) X射线衍射图谱; (b) DSC热分析曲线; (c) 电磁悬浮状态下的冷却曲线

Fig. 2. Recalescence process caused by rapid growth of primary Ni₃Ti phase(a) Single-point nucleation; (b) multi-point nucleation; (c) annular region nucleation.  初生 Ni₃Ti相快速生长引起的再辉过程(a) 单点形核; (b) 多点形核; (c) 环区形核

Fig. 3. Rotation rateversus undercooling of levitated alloy droplet悬浮状态下合金液滴的旋转速率与过冷度关系

Fig. 4. Dendritic growth and microstructure of primary Ni₃Ti phase: (a) Dendritic growth velocity; (b) maximum length and volume fraction. 初生Ni₃Ti相枝晶生长与组织特征　 (a) 枝晶生长速度; (b) 最大尺寸和体积分数

Fig. 5. Solidification microstructures of electromagnetically levitated Ni₄₀Zr_28.5Ti_16.5Al₁₀Cu₅ alloy. (a) Master alloy; (b) ΔT=115 K; (c) ΔT=200 K; (d) ΔT=290 K. 电磁悬浮条件下Ni₄₀Zr_28.5Ti_16.5Al₁₀Cu₅合金的微观组织形态 (a)母合金; (b) ΔT=115 K; (c) ΔT=200 K; (d) ΔT=290 K

Fig. 6. Liquid undercooling and eutectic growth of alloy droplets: (a) Estimated undercoolings of freely falling alloy droplets; (b) average eutectic spacing versus undercooling.合金液滴深过冷与共晶生长特征　(a)过冷度随液滴直径变化; (b) 共晶间距随过冷度变化

Fig. 7. Internal temperature field of alloy droplet versus diameter and location (a) Temperature distribution; (b) temperature gradient; (c) cooling rate.合金液滴内部温度场随直径和位置的变化关系　(a) 温度分布; (b) 温度梯度; (c) 冷却速率

Fig. 8. Microstructural morphology of solidified alloy droplets with different diameters.(a) 957 μm diameter; (b) Enlarged A in (a); (c) Enlarged B in (a)(d) 428 μm diameter; (b) Enlarged C in (d); (c) Enlarged D in (d) 自由落体条件下不同直径合金液滴的凝固组织形貌 (a) 957 μm直径; (b) A区放大; (c) B区放大(d) 428 μm直径; (e) C区放大; (f) D区放大

Fig. 9. Amorphous phase distribution versus alloy droplet diameter合金液滴凝固组织中非晶相分布规律

Fig. 10. Variation of solidification microstructures with alloy droplets diameter: (a) Typical structure parameters; (b) average eutectic spacing.合金凝固组织特征随液滴直径变化规律　(a) 非晶相体积分数; (b) 共晶相平均间距