Dual mode segregation of Pd to the surface of polycrystalline Fe99Pd1

被引：13

作者：

Creemers, C

机构：

[1] Fysico-chemisch Laboratorium, Katholieke Universiteit Leuven, B-3001 Leuven

来源：

SURFACE SCIENCE | 1996年 / 360卷 / 1-3期

关键词：

intermetallic compounds; iron; LEIS; palladium; polycrystalline surfaces; surface segregation; surface thermodynamics;

D O I：

10.1016/0039-6028(96)00304-4

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：

On a polycrystalline Fe,Pd, sample, unusually fast and abundant segregation is observed up to 55 at% Pd. The dependence on temperature and on the bulk concentration are also contradictory to normal segregation behaviour, Once the sample is heated to at least 750-800 degrees C, normal, slower segregation behaviour is observed up to a maximum of ca. 35 at% Pd. The unusual segregation behaviour can be explained by segregation from a two-phase bulk leading to an ordered Fe50Pd50 surface phase.

引用

页码：10 / 20

页数：11

共 18 条

[1] BOND AND STRAIN-ENERGY EFFECTS IN SURFACE SEGREGATION - ATOMIC CALCULATION [J].