Point defects in B2-type intermetallic compounds

Authors
Kogachi, M Haraguchi, T
Citation
M. Kogachi et T. Haraguchi, Point defects in B2-type intermetallic compounds, MAT SCI E A, 312(1-2), 2001, pp. 189-195
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
312
Issue
1-2
Year of publication
2001
Pages
189 - 195
Database
ISI
SICI code
0921-5093(20010815)312:1-2<189:PDIBIC>2.0.ZU;2-G
Abstract
Recent development in investigations of point defect structure in B2-type i ntermetallics is surveyed, mainly focusing on those by authors' group. Syst ematic X-ray and neutron diffraction experiments showed that B2 alloys exhi bit hybrid defect behavior, i.e. four kinds of defects (antisite defects an d vacancies) generally coexist in this type of materials. Careful density m easurements strongly suggest that constitutional vacancies do not exist eve n in NiAl. A thermodynamic model based on the Bragg-Williams method reprodu ces well the observed trends in B2 NiAl and FeAl alloys. (C) 2001 Elsevier Science B.V. All rights reserved.