Characterization of Lattice Defects in Refractory Metal High-Entropy Alloy HfNbTaTiZr by Means of Positron Annihilation Spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456297" target="_blank" >RIV/00216208:11320/22:10456297 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=t7hDwlF2Uu" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=t7hDwlF2Uu</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/pssa.202100840" target="_blank" >10.1002/pssa.202100840</a>
Alternative languages
Result language
angličtina
Original language name
Characterization of Lattice Defects in Refractory Metal High-Entropy Alloy HfNbTaTiZr by Means of Positron Annihilation Spectroscopy
Original language description
Lattice defects in refractory metal high-entropy alloy HfNbTaTiZr are investigated using positron lifetime spectroscopy combined with coincidence Doppler broadening (CDB) spectroscopy. Annealing of HfNbTaTiZr alloy at 1000 degrees C results in full recovery of defects and formation of single-phase random solid solution characterized by the bulk positron lifetime of 141 ps. This value is in accordance with the theoretical estimation. Quenching of the alloy from high temperature prevents recovery of thermally equilibrium vacancies and enables to retain a high concentration of vacancies in the sample at ambient temperature. For single vacancies in the HfNbTaTiZr alloy, a characteristic positron lifetime of 212 ps is measured, which is significantly shorter than the value estimated by theoretical calculations. It indicates that there is considerable ion relaxation around vacancies. The CDB spectroscopy investigations reveal that vacancies in HfNbTaTiZr alloy are not distributed randomly but are preferentially coupled with Hf solutes.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA21-16218S" target="_blank" >GA21-16218S: Hydrogen absorption and desorption in refractory metal high entropy alloys with body centred cubic structure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physica Status Solidi (A) Applications and Materials
ISSN
1862-6300
e-ISSN
1862-6319
Volume of the periodical
219
Issue of the periodical within the volume
9
Country of publishing house
DE - GERMANY
Number of pages
8
Pages from-to
2100840
UT code for WoS article
000770997400001
EID of the result in the Scopus database
2-s2.0-85126775152