Diffusion in nanocrystalline materials

被引：75

作者：

Belova, IV ^{[1
]}

Murch, GE ^{[1
]}

机构：

[1] Univ Newcastle, Sch Engn, Dept Mech Engn, Diffus Solids Grp, Callaghan, NSW 2308, Australia

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2003年 / 64卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

nanocrystalline materials; diffusivity; grain boundaries; segregation factor;

D O I：

10.1016/S0022-3697(02)00421-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The problem of calculating the effective diffusivity in nanocrystalline materials is addressed. Two simple two-dimensional grain patterns are constructed and several equations are derived from the Hart-Mortlock and Maxwell-Gamett equations. Monte Carlo computer simulation is used to test the validity of the various equations. It is shown that one of the derived equations provides an excellent description of the effective diffusivities up to a volume fraction of atoms in grain boundaries of 40%. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：873 / 878

页数：6

共 14 条

[1]

Belova IV, 2001, PHILOS MAG A, V81, P2447, DOI 10.1080/01418610110038402

[2]

BELOVA IV, 2002, P MATLS RES SOC, V731

[3]

Birringer R., 1986, T JAPAN I METALS S, V27, P43

[4] 59Fe grain boundary diffusion in nanostructured γ-Fe-Ni -: Part I:: Radiotracer experiments and Monte-Carlo simulation in the type-A and B kinetic regimes [J].

Divinski, SV ;

Hisker, F ;

Kang, YS ;

Lee, JS ;

Herzig, C .

ZEITSCHRIFT FUR METALLKUNDE, 2002, 93 (04) :256-264

[5]

German R.M., 1989, PARTICLE PACKING CHA

[6] ON THE ROLE OF DISLOCATIONS IN BULK DIFFUSION [J].

HART, EW .

ACTA METALLURGICA, 1957, 5 (10) :597-597

[7]

Horvath J., 1989, Diffusion and Defect Data - Solid State Data, Part A (Defect and Diffusion Forum), V66-69, P207

[8] Calculations of the effective diffusion coefficient for inhomogeneous media [J].

Kalnin, JR ;

Kotomin, EA ;

Maier, J .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2002, 63 (03) :449-456

[9]

Kalnin Yu. H., 1995, Radiation Effects and Defects in Solids, V137, P295, DOI 10.1080/10420159508222738

[10]

Kaur I., 1995, Fundamentals of Grain and Interphase Boundary Diffusion, VThird

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