KINETIC-MODEL FOR EQUILIBRIUM AND NONEQUILIBRIUM SEGREGATION IN CONCENTRATED ALLOYS UNDER IRRADIATION

被引：42

作者：

GRANDJEAN, Y ^{[1
]}

BELLON, P ^{[1
]}

MARTIN, G ^{[1
]}

机构：

[1] CTR RENARDIERES,EDF,DER,EMA,F-77250 MORET SUR LOING,FRANCE

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.50.4228

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a mean-field lattice rate model for describing the kinetics of equilibrium as well as irradiation-induced surface segregation in concentrated alloys. The kinetics and thermodynamics are treated in a mutually consistent way. The model treats the composition field of the chemical constituents and of the point defects. The latter are nonconservative and are produced and destroyed either by the nuclear collisions in the bulk or by thermally activated exchange of the atoms with the free surface. The few adjustable parameters can be scaled to the thermodynamics and kinetics of the alloy. Published experimental segregation profiles in Ni-Cu alloy with two compositions and three temperatures are successfully reproduced with a single set of parameters: they exhibit inversion of segregation induced by irradiation.

引用

页码：4228 / 4231

页数：4

共 37 条

[1]

Anderson P.L, 1989, 4TH INT C ENV DEGR M, P1

[2]

ANTHONY TR, 1971, RAD INDUCED VOIDS ME, P630

[3] RADIATION-INDUCED PRECIPITATION IN NICKEL SILICON SOLID-SOLUTIONS - II - DOSE-RATE EFFECTS [J].

BARBU, A ;

MARTIN, G .

SCRIPTA METALLURGICA, 1977, 11 (09) :771-775

[4] CASCADE EFFECTS IN A NONEQUILIBRIUM PHASE-TRANSITION WITH METALLURGICAL RELEVANCE [J].

BELLON, P ;

MARTIN, G .

PHYSICAL REVIEW B, 1989, 39 (04) :2403-2410

[5]

BOCQUET JL, 1987, RES MECH, V22, P1

[6]

DEFONTAINE D, 1979, SOLID STATE PHYS, V34, P74

[7] RELATION BETWEEN FORMATION ENERGY OF A VACANCY AND NEAREST NEIGHBOR INTERACTIONS IN PURE METALS AND LIQUID-METALS [J].

DOYAMA, M ;

KOEHLER, JS .

ACTA METALLURGICA, 1976, 24 (09) :871-879

[8] IRRADIATION-INDUCED GRAIN AND LATH BOUNDARY SEGREGATION IN FERRITIC MARTENSITIC STEELS [J].

FAULKNER, RG ;

LITTLE, EA ;

MORGAN, TS .

JOURNAL OF NUCLEAR MATERIALS, 1992, 191 :858-861

[9]

Flynn C. P, 1972, POINT DEFECTS DIFFUS

[10]

GIBBS JW, 1948, COLLECTED WORKS GIBB, V1

← 1 2 3 4 →