利用透射电镜对单辊液淬法制备的 Al- 8Fe- 4Ce快凝合金的显微组织进行了分析 ;讨论了显微组织中金属间化合物相的分布与其凝固行为之间的关系。分析认为 :在快速凝固 Al- Fe基合金的过冷熔体中 ,α- Al相为优于金属间化合物相的先析出相 ,随后在熔体中弥散析出金属间化合物相 ,随着α- Al生长界面的推进 ,这些金属间化合物相被“排斥”或被“捕获”,最终形成“Zone B”或“Zone A”组织。 The microstructure of Al-8Fe-4Ce alloy prepared by single-roll liquid quenching was analyzed by transmission electron microscopy. The relationship between the distribution of intermetallic phases in the microstructure and its solidification behavior was discussed. It is concluded that the α-Al phase is the pre-precipitation phase superior to the intermetallic phase in the rapidly solidified Al-Fe-based undercooled melt, followed by the dispersion of the intermetallic compound phase in the melt, Al growth interface, these intermetallic phases are “rejected” or “trapped”, eventually forming a “Zone B” or “Zone A” organization.