采用高压气体雾化技术制备了Cu-Fe合金粉末,并对粉末的组织进行了观察分析.结果表明,雾化液滴的尺寸与合金成分影响凝固组织的演变过程.雾化液滴尺寸越小,其内部富Fe相越弥散;Fe含量越接近亚稳液态组元不混溶区域的临界成分,越容易发生液-液相变.分析表明,富Fe液滴的Marangoni迁移和富Fe粒子与固-液界面之间的相互作用是导致粉末外部形成贫Fe层的主要原因.
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