Positron annihilation study of nanocrystalline iron

Authors
Segers, D Van Petegem, S Loffler, JF Van Swygenhoven, H Wagner, W Dauwe, C
Citation
D. Segers et al., Positron annihilation study of nanocrystalline iron, NANOSTR MAT, 12(5-8), 1999, pp. 1059-1062
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
NANOSTRUCTURED MATERIALS
ISSN journal
09659773 → ACNP
Volume
12
Issue
5-8
Year of publication
1999
Part
B
Pages
1059 - 1062
Database
ISI
SICI code
0965-9773(199907)12:5-8<1059:PASONI>2.0.ZU;2-X
Abstract
Positron lifetime measurements on different nanocrystalline iron samples sh ow that the microstructure, with respect to the inherent free volumes in th e samples, can be determined Three distinct defect types can be detected i) a vacancy-like defect in the interface, ii) a microvoid at the intersectio n of interfaces and iii) larger free volumes (missing grains) where the ann ihilation of ortho-positronium is observed. The effect of the crystallite s ize and preparation conditions of the samples are discussed (C) 1999 Acta M etallurgica Inc.