简要叙述了Nd-Fe-B合金在平衡、非平衡条件下的凝固规律及其晶体生长特点.高性能烧结Nd-Fe-B磁体对母合金组织的要求(不含α-Fe,具有明显的柱状晶,柱状晶尺寸均匀,宽度在5～25μm之间,富Nd相有序排列,分布均匀)及Nd-Fe-B磁体在通讯、电子、医疗等行业的大量应用,促进了新兴近快冷厚带制备技术的诞生.系统阐述了新兴近快冷厚带制备技术的特点与优势;从柱状晶的生长条件出发,重点说明了诸如化学成分优化、氧含量、温度场、冷却速度等关键工艺参数的控制原则.
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