球磨中B_2型FeAl的嵌镶碎化和长程有序度  

Mosaic fragmentation and length range order parameters in FeAl intermetallic compound of type B_2 in the process of ball grinding mills

作　　者：张翔 朱静[1] 蔡其巩[1] 郑明新[2] 

机构地区：[1]钢铁研究总院物理室 [2]清华大学机械工程系

出　　处：《清华大学学报（自然科学版）》1993年第2期46-50,共5页Journal of Tsinghua University(Science and Technology)

摘　　要：研究了Ｂ２型金属间化合物 ＦｅＡｌ在机械球磨过程中的嵌镶碎块尺寸与长程有序度之间的关系。发现随球磨时间的增长，嵌镶碎块尺寸和长程有序度同时减小。由于嵌镶碎化主要由位错亚晶粒造成，应用Ｃｏｔｔｒｅｌｌ气团模型可建立嵌镶碎块尺寸与长程有序度之间的关系式。所得的这个关系式表明，长程有序度的降低主要是由位错与点阵原子的相互作用引起的。The paper studies the correlation between mosaic fragment size and length range order parameters in FeAl intermetallic compound of type B2 in the process of ball grinding mills. It is found that mosaic fragment size and length range order parameters decrease with increase of milling time. Assuming that mosaic fragmentation is caused by dislocation subgrains; from the application of Cottrell's atmosphere model a relationship between mosaic fragment size and length range order parameters is well established, which indicates that the decrease in length range order parameters probably results from the interaction of dislocations with atoms in lattices.

关 键 词：金属间化合物 机械球磨 嵌镶碎化 

分 类 号：TG113[金属学及工艺—物理冶金]