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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

4068-4078

Kód UT WoS článku

000291119700028

EID výsledku v databázi Scopus

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