Free volume fragmentation in glassy chalcogenides during natural physical ageing as probed by PAL spectroscopy

被引：20

作者：

Golovchak, R. ^{[1
]}

Ingram, A. ^{[2
]}

Kozyukhin, S. ^{[3
]}

Shpotyuk, O. ^{[4
]}

机构：

[1] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

[2] Opole Univ Technol, Fac Phys, PL-45370 Opole, Poland

[3] RAS, Inst Gen & Inorgan Chem, Moscow 199991, Russia

[4] Jan Dlugosz Univ, Inst Phys, PL-42201 Czestochowa, Poland

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2013年 / 377卷

关键词：

Chalcogenide glass; PAL; Ageing; POSITRON-ANNIHILATION; LIFETIME; TEMPERATURE; LIQUIDS;

D O I：

10.1016/j.jnoncrysol.2013.01.039

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Free volume redistribution, caused by structural relaxation during long-term natural physical ageing, is revealed by positron annihilation lifetime technique for AsxSe100-x and GeySe100-y glasses. It is shown, that two-state positron trapping model is appropriate for an adequate description of changes caused by long-term physical ageing in the atomic-deficient subsystem of these materials. The observed behaviour of defect-related component in the fit of the experimentally measured PAL spectra for aged and rejuvenated glasses testifies in favour of fragmentation of larger free volume entities. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：49 / 53

页数：5

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