Wetting and structural transition induced by segregation at grain boundaries:: A Monte Carlo study

被引：34

作者：

Creuze, J

Berthier, F ^{[1
]}

Tétot, R

Legrand, B

机构：

[1] Univ Paris Sud, LEMHE, UMR 8647 CNRS, F-91405 Orsay, France

[2] CEA Saclay, DECM, SRMP, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.86.5735

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Wetting of the Sigma = 5 (310) (001) symmetrical tilt grain boundary (GB) close to the solubility Limit in the Cu(Ag) solid solution has been observed by means of Monte Carlo simulations at T = 600 K. More precisely, a finite thickness film almost pure in Ag, separating the two initial Cu(Ag) grains, can be obtained from a critical intergranular germ induced by the strong segregation of Ag in the GB. As this film is actually a single crystal,, this implies a complete rearrangement of the GB core structure. Thus the initial GB is replaced by two eu(Ag)/Ag(Cu) interfaces. Evidence is presented for the increase of the film thickness when approaching the solubility limit, as expected in wetting phenomena.

引用

页码：5735 / 5738

页数：4

共 13 条

[1] How to compare superficial and intergranular segregation?: A new analysis within the mixed SMA-TBIM approach [J].