SURFACE SEGREGATION IN ALLOYS

被引：48

作者：

KUMAR, V ^{[1
]}

KUMAR, D ^{[1
]}

JOSHI, SK ^{[1
]}

机构：

[1] UNIV ROORKEE,DEPT PHYS,ROORKEE 247667,UTTAR PRADESH,INDIA

来源：

PHYSICAL REVIEW B | 1979年 / 19卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.19.1954

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a quasichemical theory to predict surface segregation in nonregular solutions. Surface concentration and surface short-range-order (SRO) parameters have been calculated for Ag-Au and Ag-Pd systems. Our results show segregation of Ag on the surface in both the systems. It is observed that the nonregular-solution model does not give results much different from the regular-solution model. However, the surface SRO parameters are significantly different from their bulk values. Surface concentrations averaged over the first few layers have also been calculated. Our results are in agreement with the results obtained from Auger electron spectroscopy. © 1979 The American Physical Society.

引用

页码：1954 / 1962

页数：9

共 47 条

[21] KERKER G, 1977, PHYS REV B, V15, P638, DOI 10.1103/PhysRevB.15.638
[22] THEORY OF DOMAIN WALLS IN ORDERED STRUCTURES .2. PAIR APPROXIMATION FOR NONZERO TEMPERATURES
KIKUCHI, R
CAHN, JW
[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1962, 23 (JAN-F) : 137 - &
[23] SURFACE SEGREGATION IN RANDOM ALLOYS
KUMAR, D
MOOKERJEE, A
KUMAR, V
[J]. JOURNAL OF PHYSICS F-METAL PHYSICS, 1976, 6 (05): : 725 - 738
[24] KUMAR V, 1977, THESIS U ROORKEE
[25] LAYGRAF C, 1974, SURF SCI, V46, P157
[26] SEGREGATION AT CU-AU ALLOY SURFACES
MCDAVID, JM
FAIN, SC
[J]. SURFACE SCIENCE, 1975, 52 (01) : 161 - 173
[27] Mclean D., 1957, GRAIN BOUNDARIES MET
[28] DETERMINATION OF SURFACE VERSUS BULK COMPOSITION OF SILVER-GOLD ALLOYS BY LOW-ENERGY ION SCATTERING SPECTROSCOPY
NELSON, GC
[J]. SURFACE SCIENCE, 1976, 59 (01) : 310 - 314
[29] SURFACE COMPOSITION OF SILVER-GOLD SYSTEM BY AUGER-ELECTRON SPECTROSCOPY
OVERBURY, SH
SOMORJAI, GA
[J]. SURFACE SCIENCE, 1976, 55 (01) : 209 - 226
[30] SURFACE COMPOSITION OF BINARY-SYSTEMS - PREDICTION OF SURFACE PHASE-DIAGRAMS OF SOLID-SOLUTIONS
OVERBURY, SH
BERTRAND, PA
SOMORJAI, GA
[J]. CHEMICAL REVIEWS, 1975, 75 (05) : 547 - 560

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