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1992 | 82 | 2 | 315-322
Article title

Lattice Site Occupancy in Ternary Ordered Ni_{3}Al_{1-x}Fe_{x} Alloys Estimated by EXAFS

Content
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Languages of publication
EN
Abstracts
EN
Extended X-ray absorption fine structure (EXAFS) spectroscopy offers additional experimental evidence to the solution of site occupancy problem in ternary NiAlX alloys. A study of local order in the stoichiometric Ni_{3}Al_{1-x}Fe_{x} ternary alloys (x = 0.02, 0.05, 0.10, 0.15, and 0.25) by EXAFS at the K-edge of Fe in the energy range from 7000 eV to 7600 eV are presented. Three models of substitutional behavior are considered - the preferential substitution of Fe atoms in: 1) Ni sites, 2) Al sites, 3) both sites. Data analysis was performed with theoretical and experimentally determined scattered photoelectron phases and amplitudes. The results of the EXAFS analysis are consistent with the picture in which most of the Fe atoms substitute Al sites and less than 25% of Fe atoms substitute Ni sites. Alloys with more than 10 at% of Fe showed higher tendency for ordering than those containing less than 10 at% Fe.
Keywords
EN
Publisher

Year
Volume
82
Issue
2
Pages
315-322
Physical description
Dates
published
1992-08
Contributors
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
author
  • INFN Laboratori Nazionali di Frascati, CP-13, 00044 Frascati, Rome, Italy
author
  • INFN Laboratori Nazionali di Frascati, CP-13, 00044 Frascati, Rome, Italy
author
  • Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
References
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Publication order reference
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bwmeta1.element.bwnjournal-article-appv82z212kz
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