Chevron defect at the intersection of grain boundaries with free surfaces in Au -: art. no. 085502

被引：38

作者：

Radetic, T ^{[1
]}

Lançon, F ^{[1
]}

Dahmen, U ^{[1
]}

机构：

[1] LBNL, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.89.085502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have identified a new defect at the intersection between grain boundaries and surfaces in Au using atomic resolution transmission electron microscopy. At the junction line of 90degrees <110> tilt grain boundaries of (110)-(001) orientation with the free surface, a small segment of the grain boundary, about 1 nm in length, dissociates into a triangular region with a chevronlike stacking disorder and a distorted hcp structure. The structure and stability of these defects are confirmed by atomistic simulations, and we point out the relationship with the one-dimensional incommensurate structure of the grain boundary.

引用

页码：085502/1 / 085502/4

页数：4

共 27 条

[11] Quasicrystalline gold interface with a hypo-friction property [J].

Lançon, F ;

Pénisson, JM ;

Dahmen, U .

EUROPHYSICS LETTERS, 2000, 49 (05) :603-609

[12] Effect of grain boundary dislocations on 9R stacking errors at an incoherent twin boundary in copper [J].

Medlin, DL ;

Foiles, SM ;

Campbell, GH ;

Carter, CB .

INTERGRANULAR AND INTERPHASE BOUNDARIES IN MATERIALS, IIB98, 1999, 294-2 :35-42

[13] A dislocation-based description of grain boundary dissociation:: Application to a 90° ⟨110⟩ tilt boundary in gold [J].

Medlin, DL ;

Foiles, SM ;

Cohen, D .

ACTA MATERIALIA, 2001, 49 (18) :3689-3697

[14] ATOMIC-STRUCTURE OF GRAIN-BOUNDARIES [J].

MERKLE, KL .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1994, 55 (10) :991-1005

[15] Atomic-scale grain boundary relaxation modes in metals and ceramics [J].

Merkle, KL .

MICROSCOPY AND MICROANALYSIS, 1997, 3 (04) :339-351

[16] THE EFFECT OF THERMAL GROOVING ON GRAIN BOUNDARY MOTION [J].

MULLINS, WW .

ACTA METALLURGICA, 1958, 6 (06) :414-427

[17] High resolution study of a quasiperiodic grain boundary in gold [J].

Pénisson, JM ;

Lançon, F ;

Dahmen, U .

INTERGRANULAR AND INTERPHASE BOUNDARIES IN MATERIALS, IIB98, 1999, 294-2 :27-34

[18]

RADETIC T, 2001, P MAT RES SOC BOST 2, V695

[19] <110> symmetric tilt grain-boundary structures in fcc metals with low stacking-fault energies [J].

Rittner, JD ;

Seidman, DN .

PHYSICAL REVIEW B, 1996, 54 (10) :6999-7015

[20] Grain-boundary dissociation by the emission of stacking faults [J].

Rittner, JD ;

Seidman, DN ;

Merkle, KL .

PHYSICAL REVIEW B, 1996, 53 (08) :R4241-R4244

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