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)：

研究了机械合金化合成的Fe-Al-Ti-B四元粉体在800-1100℃等温热处理过程中的结构演变及晶粒生长动力学,讨论了晶粒生长机制。研究表明,采用机械合金化加后续热处理工艺可以合成原位TiB2/Fe3Al基纳米复合材料粉体。球磨80h的Fe-Al-Ti-B四元粉体在热处理过程中Fe(Al,Ti,B)分解形成纳米晶DO3-Fe3Al及TiB2两个组成相。随热处理温度的升高,Fe3Al晶粒生长由主要受晶界扩散控制过渡到主要受晶格扩散控制。在热处理过程中,Fe3Al晶粒生长的动力学方程为:K=1.5×10-5exp(-578.7×103/RT),晶粒生长受到明显的抑制,原位TiB2/Fe3Al基纳米复合材料粉体的热稳定性高。

关键词(KeyWords)： Fe3Al;热处理;结构演变;晶粒生长动力学

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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