FIELD-ION MICROSCOPY OBSERVATIONS AND ATOMISTIC SIMULATIONS OF RIGID-BODY SHIFTS AT TILT GRAIN BOUNDARIES IN TUNGSTEN

被引：5

作者：

Azhazha, V. M. ^{[1
]}

Neklyudov, I. M. ^{[1
]}

Ksenofontov, V. A. ^{[1
]}

Mazilova, T. I. ^{[1
]}

Mikhailovskij, I. M. ^{[1
]}

Sadanov, E. V. ^{[1
]}

Mazilov, A. A. ^{[1
]}

机构：

[1] Kharkov Phys & Technol Inst, Ctr Nat Sci, UA-61108 Kharkov, Ukraine

来源：

SURFACE REVIEW AND LETTERS | 2008年 / 15卷 / 05期

关键词：

Grain boundary; atomic structure; tungsten; molecular dynamic simulation; field-ion microscopy;

D O I：

10.1142/S0218625X08011767

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：

Field-ion microscopy and molecular dynamics simulation were used for the characterization of the translation states at special grain boundaries in tungsten. It is revealed that rigid-body displacement had the component of displacement parallel to the [110] direction equal to 0 or 1 interplanar spacing. Full vectors of lateral shifts are described by broad statistical distribution. The mathematical simulation revealed two mirror-symmetry-breaking lateral translations along the [(2) over bar 21] direction of the Sigma 9 grain boundary corresponding to different atomic structures. It is shown that the partial disconnection with the (a/18)[(2) over bar 21] Burgers vector can be considered as the elemental carriers of grain-boundary polymorphic transformation.

引用

页码：557 / 565

页数：9

共 20 条

[1] The rigid-body displacement observed at the Σ=5, (310)-[001] symmetric tilt grain boundary in central transition bcc metals [J].

Campbell, GH ;

Kumar, M ;

King, WE ;

Belak, J ;

Moriarty, JA ;

Foiles, SM .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2002, 82 (08) :1573-1594

[2] INTERATOMIC INTERACTIONS FOR MO AND W BASED ON THE LOW-ORDER MOMENTS OF THE DENSITY-OF-STATES [J].

FOILES, SM .

PHYSICAL REVIEW B, 1993, 48 (07) :4287-4298

[3]

GARBER RI, 1968, SOV PHYS JETP-USSR, V27, P381

[4]

GARBER RI, 1968, FIZ TVERD TELA+, V10, P799

[5] DISLOCATIONS, STEPS AND DISCONNECTIONS AT INTERFACES [J].

HIRTH, JP .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1994, 55 (10) :985-989

[6] The relation between grain-boundary structure and sliding resistance [J].

Hoagland, RG ;

Kurtz, RJ .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2002, 82 (06) :1073-1092

[7] STEP HEIGHTS ASSOCIATED WITH GRAIN-BOUNDARY DISLOCATIONS IN CUBIC-CRYSTALS [J].

KING, AH .

ACTA METALLURGICA, 1982, 30 (02) :419-427

[8] Atomic mechanism of radiation-induced erosion of field electron emitters [J].

Mazilova, TI ;

Mikhailovskij, IM .

SURFACE AND INTERFACE ANALYSIS, 2004, 36 (5-6) :510-514

[9]

MAZILOVA TI, 2004, THESIS KHARKOV I PHY

[10]

MAZILOVA TI, 1995, TECH PHYS LETT, V211, P1019

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