汤文明,郑治祥,唐红军,吴玉程,任榕,汤志鸣

• 1:合肥工业大学材料科学与工程学院
• 2:合肥工业大学材料科学与工程学院
• 3:合肥工业大学材料科学与工程学院
• 4:合肥工业大学材料科学与工程学院

摘要(Abstract)：

研究了机械合金化过程中Fe-Al-Ti-B四元粉体的结构演变,讨论了其合金化机制。研究表明,Fe-Al-Ti-B四元粉体的机械合金化通过Al、Ti、B原子向Fe晶格中扩散形成Fe(Al,Ti,B)过饱和固溶体。在机械合金化的早期(<10h),形成包覆结构的复合颗粒,合金化尚未进行。在机械合金化的中期(10-60h),首先形成具有几个同心圆环结构的复合颗粒,然后环状结构消失,同时Fe(Al,Ti,B)晶格常数迅速增加,但成分均匀化过程缓慢。在机械合金化的后期(60-80h),主要发生复合颗粒内部的成分均匀化过程,球磨80h后,复合颗粒内部各组元的成分已经非常均匀。Fe(Al,Ti,B)晶粒细小(6.8nm),晶格畸变严重,具有近似非晶态的结构。由于Ti、B元素的添加,Fe-Al-Ti-B四元粉体晶粒细化速率更快,但合金化速率明显降低。

关键词(KeyWords)： Fe3Al;复合材料;机械合金化;结构演变;纳米晶

Abstract:

Keywords:

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

作者(Author): 汤文明,郑治祥,唐红军,吴玉程,任榕,汤志鸣

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