Quantitative chemical analysis of vacancy-solute complexes in metallic solid solutions by coincidence Doppler broadening spectroscopy

被引：13
|
作者：
Folegati, P. [1 ]
Dupasquier, A. [1 ]
Ferragut, R. [1 ]
Iglesias, M. M. [1 ]
Makkonen, I. [2 ]
Puska, M. J. [2 ]
机构：
[1] Politecn Milan, Dipartimento Fis, Via Anzani 42, I-22100 Como, Italy
[2] Aalto Univ, Lab Phys, Espoo 02015, Finland
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 10 | 2007年 / 4卷 / 10期
关键词：
D O I：
10.1002/pssc.200675741
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Low background measurements of I D momentum spectra of the positron annihilation radiation by the coincidence Doppler broadening (CDB) method are currently used to obtain the quantitative chemical analysis of the environment of vacancy-like defects in supersaturated solid solution of metals. Fractional concentrations are obtained by fitting the CDB; spectra with linear combination of reference spectra. Examples regarding Al-based alloys are presented to show the quality of the fitting and the consistency of the CDB analysis with positron lifetime measurements. The appropriate choice of the references is considered a key factor for reducing systematic errors. Nevertheless the method still awaits a theoretical validation. Preliminary first-principles calculations regarding Cu-decorated vacancies in aluminium are presented. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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收藏
页码：3493 / +
页数：2
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