Dynamics of superstructure formation in intermetallic compounds

被引：4

作者：

Kozubski, R ^{[1
]}

Czekaj, S ^{[1
]}

Kozlowski, M ^{[1
]}

Partyka, E ^{[1
]}

Zapala, K ^{[1
]}

机构：

[1] Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 378卷 / 1-2期

关键词：

intermetallics; casting; crystal structure and symmetry; high temperature alloys; thermal analysis;

D O I：

10.1016/j.jallcom.2003.11.168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Experimental research of "order-order" kinetics in binary intermetallics showing highly stable superstructures revealed that specific features of "order-order" relaxations are attributed to the type of superstructure. Corresponding simulation studies elucidated specific atomistic mechanisms of the processes. It has been shown that two time scales revealed experimentally in "order-order" relaxations in L1(2) and L1(0)-ordered systems follow from an interplay between ordering/disordering and the easy diffusion of antisites within one sublattice. In triple-defect B2-ordered intermetallics, strict correlation between ordering/disordering and vacancy elimination/formation dramatically slows down the process despite very high vacancy concentration. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：302 / 307

页数：6

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