Thermal vacancies in Fe(3)Al studied by positron annihilation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10103796" target="_blank" >RIV/00216208:11320/11:10103796 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S1359645411001789" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1359645411001789</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.actamat.2011.03.031" target="_blank" >10.1016/j.actamat.2011.03.031</a>

Result language
angličtina
Original language name
Thermal vacancies in Fe(3)Al studied by positron annihilation
Original language description
Vacancies in Fe(3)Al intermetallic alloys were investigated by positron annihilation spectroscopy combined with X-ray diffraction. Two complementary techniques of positron annihilation were employed: positron lifetime spectroscopy and coincidence Dopplerbroadening. The experimental results were combined with ab initio theoretical calculations of positron characteristics. It was found that Fe(3)Al quenched from 1000 degrees C exhibits a mainly disordered A2 structure. Defects in the as-quenched sample were identified as Fe vacancies on the A sub-lattice surrounded by A1 nearest neighbors. The concentration of quenched-in vacancies was determined from the positron lifetime results. The samples were subsequently subjected to isochronal annealing which enabled an investigation of the recovery of quenched-in vacancies and the formation of thermal vacancies in B2 phase. It was found that recovery of quenched-in vacancies is accompanied by ordering to the D0(3) structure. The enthalpy and en
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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