SURFACE SEGREGATION STUDY OF A DILUTE PD1FE99 ALLOY BY LEIS AND XPS

被引：23
作者：
BERTOLINI, JC
ROUSSET, JL
MIEGGE, P
MASSARDIER, J
TARDY, B
SAMSON, Y
KHANRA, BC
CREEMERS, C
机构：
[1] KATHOLIEKE UNIV LEUVEN,FYSICO CHEM,B-3001 LOUVAIN,BELGIUM
[2] SAHA INST NUCL PHYS,CALCUTTA 700064,INDIA
来源：
SURFACE SCIENCE | 1993年 / 281卷 / 1-2期
关键词：
16;
D O I：
10.1016/0039-6028(93)90859-I
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：
Pd segregates to a large extent to the surface of a Pd1Fe99 alloy stabilized at 870 K. The outer layer composition contains as much as 55 +/- 5 at% Pd as deduced from LEIS data. Complementary XPS measurements performed at various exit angles with respect to the surface indicated that the Pd enrichment extends to more than one layer below the very surface. A calculation of the segregation free enthalpy based on the broken bond model using macroscopic thermodynamic data, allows us to describe the concentration equilibrium between the first and second layers well.
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页码：102 / 110
页数：9
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