X-ray scattering and EXAFS studies of Pt1-xVx alloys

被引：2

作者：

Gibaud, A. ^{[1
]}

Topic, M. ^{[2
]}

Corbel, G. ^{[3
]}

Briois, V. ^{[4
]}

Thiaudiere, D. ^{[4
]}

Pineda-Vargas, C. A. ^{[2
]}

Ntsoane, T. ^{[5
]}

机构：

[1] Univ Maine, Lab Phys Etat Condense, UMR CNRS 6087, F-72085 Le Mans 9, France

[2] Natl Res Fdn, IThemba LABS, ZA-7129 Somerset West, South Africa

[3] Univ Maine, Lab Oxydes & Fluorures, UMR CNRS 6010, F-72085 Le Mans 9, France

[4] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[5] Necsa, ZA-0001 Pretoria, South Africa

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 562卷

关键词：

Metals and alloys; Composition fluctuation; X-ray diffraction; EXAFS;

D O I：

10.1016/j.jallcom.2013.01.059

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：

Alloys of the Pt-V system between 0 and 50 at.% V have been investigated by X-ray scattering and extended X-ray absorption fine structure (EXAFS). The variation of lattice parameter with the nominal chemical composition was measured and compared to previously reported values. The solid solution was observed in alloys containing up to 20 at.% V. In the alloy with higher vanadium concentration, 50 at.% V, we found that the alloy is not homogeneous and exhibits a segregation of Pt and PtV phases in addition to VO2(M) phase. These experiments are complemented by EXAFS measurements made at the K edge of V which clearly show the sensitivity of this technique to V content. Determination of the local environment of V and Pt is made via a basic model taking in account the first neighbours only. A discussion is presented about the comparison between X-ray and EXAFS results obtained from the same samples. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：95 / 98

页数：4

共 13 条

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