韩啸,汤文明,任榕,汪峰涛,吴玉程,郑治祥

• 1:合肥工业大学材料科学与工程学院

摘要(Abstract)：

采用机械合金化(MA)及热压烧结工艺制备纳米晶Fe3Al块体材料。采用X射线衍射、透射电镜、扫描电镜等对MA粉体及热压块体的相及显微组织进行分析,并对热压块体的力学性能及断口形貌进行了测试分析。结果表明:Fe72Al28混合粉在球磨过程中,Al逐渐溶入Fe中,形成Fe(Al)过饱和固溶体,纳米晶粉体的结构有序度较低。在1200℃,保温1h下真空热压烧结,Fe(Al)转变为有序的DO3-Fe3Al,同时发生晶粒长大。Fe3Al块体晶粒尺寸为40.1nm,相对密度大于96%,维氏硬度626.8 HV,三点弯曲强度985MPa;弯曲断口为脆性断口,但也呈现出一定韧性断裂特征。

关键词(KeyWords)： 机械合金化;Fe3Al;热压烧结;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 合肥工业大学科技创新基金资助项目(103-037016)

作者(Author): 韩啸,汤文明,任榕,汪峰涛,吴玉程,郑治祥

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