COPPER PALLADIUM ALLOY SURFACES .2. EQUILIBRIUM SURFACE COMPOSITIONS OF DILUTE PD/CU ALLOYS FROM A SIMPLE SEGREGATION MODEL

被引：22

作者：

NEWTON, MA ^{[1
]}

FRANCIS, SM ^{[1
]}

BOWKER, M ^{[1
]}

机构：

[1] UNIV LIVERPOOL,DEPT CHEM,LEVERHULME CTR INNOVAT CATALYSIS,LIVERPOOL L69 3BX,ENGLAND

来源：

SURFACE SCIENCE | 1991年 / 259卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(91)90523-U

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：

The composition of the CuPd[85:15](110) alloy selvedge region has been modelled using a quasichemical bond breaking model of surface segregation. The results of these calculations have been compared to those obtained from experimental studies of this surface, and it is shown that despite the neglect of size mismatch of solute and solvent atoms and the formal neglect of the ordering of the selvedge, the results are in agreement with experimental observations of an all Cu top layer, and a second layer significantly enriched in Pd. The results for the top layer Pd concentration are compared to those made by a more comprehensive but general theory of segregation. Comparisons to the analogous Cu3Au alloy surfaces and the Pt in Cu case are made, as are predictions about equilibrium selvedge compositions of other dilute Pd in Cu alloys.

引用

页码：56 / 64

页数：9

共 28 条

[1] [Anonymous], 1973, SELECTED VALUES THER
[2] AVERBACH B, 1965, ENERGETICS METALLURG, V2
[3] BARNES CA, IN PRESS
[4] XPS, UPS AND THERMAL-DESORPTION STUDIES OF THE REACTIONS OF FORMALDEHYDE AND FORMIC-ACID WITH THE CU(110) SURFACE
BOWKER, M
MADIX, RJ
[J]. SURFACE SCIENCE, 1981, 102 (2-3) : 542 - 565
[5] Brandes E. C., 1983, SMITHELLS METALS REF
[6] ORDER-DISORDER AND SEGREGATION BEHAVIOR AT THE CU3AU(001) SURFACE
BUCK, TM
WHEATLEY, GH
MARCHUT, L
[J]. PHYSICAL REVIEW LETTERS, 1983, 51 (01) : 43 - 46
[7] SURFACE DISTORTION IN FACE-CENTERED CUBIC SOLIDS
BURTON, JJ
JURA, G
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1967, 71 (06) : 1937 - &
[8] CHELIKOWSKY JR, 1984, SURF SCI, V139, P198
[9] FOILES SM, 1987, MATER RES SOC S P, V83
[10] SURFACE-STRUCTURES OF CU-AU AND CU-PD ALLOYS AS OBSERVED BY LEED
FUJINAGA, Y
[J]. SURFACE SCIENCE, 1979, 86 (JUL) : 581 - 586

← 1 2 3 →