Spark plasma sintering of gas atomized high-entropy alloy HfNbTaTiZr

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F18%3AN0000007" target="_blank" >RIV/60193247:_____/18:N0000007 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/18:00498202 RIV/00216208:11320/18:10389668

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/journal-of-materials-research/article/spark-plasma-sintering-of-gas-atomized-highentropy-alloy-hfnbtatizr/1BFF9A170BD02AA93CD87ADB9AB0A65D" target="_blank" >https://www.cambridge.org/core/journals/journal-of-materials-research/article/spark-plasma-sintering-of-gas-atomized-highentropy-alloy-hfnbtatizr/1BFF9A170BD02AA93CD87ADB9AB0A65D</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1557/jmr.2018.320" target="_blank" >10.1557/jmr.2018.320</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spark plasma sintering of gas atomized high-entropy alloy HfNbTaTiZr

Popis výsledku v původním jazyce

A homogeneous HfNbTaTiZr high-entropy alloy was successfully processed via powder metallurgy route. For the initial powder feedstock material fabrication, the electrode induction-melting gas atomization procedure was used, resulting in a spherical powder morphology and dual bcc phase composition distinguishable within the individual particles. Spark plasma sintering was then used for the powder compaction at sintering temperatures ranging from 800 to 1600 degrees C. By the characterization of the compact microstructures, lattice defects (microscopic porosity and vacancy-like misfit defects), and mechanical properties (hardness and three-point bending strength), the sintering conditions were optimized to obtain a fully dense, homogeneous, single-phase bcc material. It was found that such properties are achieved when sintering at 80 MPa pressure for 2 min at temperatures above 1200 degrees C, where the single bcc phase structure exhibited ductile behavior with considerable flexural strength and ductility at ambient temperature. Positron annihilation spectroscopy was used to characterize the evolution of atomic and mesoscale defects during optimization of the sintering process.

Název v anglickém jazyce

Spark plasma sintering of gas atomized high-entropy alloy HfNbTaTiZr

Popis výsledku anglicky

A homogeneous HfNbTaTiZr high-entropy alloy was successfully processed via powder metallurgy route. For the initial powder feedstock material fabrication, the electrode induction-melting gas atomization procedure was used, resulting in a spherical powder morphology and dual bcc phase composition distinguishable within the individual particles. Spark plasma sintering was then used for the powder compaction at sintering temperatures ranging from 800 to 1600 degrees C. By the characterization of the compact microstructures, lattice defects (microscopic porosity and vacancy-like misfit defects), and mechanical properties (hardness and three-point bending strength), the sintering conditions were optimized to obtain a fully dense, homogeneous, single-phase bcc material. It was found that such properties are achieved when sintering at 80 MPa pressure for 2 min at temperatures above 1200 degrees C, where the single bcc phase structure exhibited ductile behavior with considerable flexural strength and ductility at ambient temperature. Positron annihilation spectroscopy was used to characterize the evolution of atomic and mesoscale defects during optimization of the sintering process.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA17-17016S" target="_blank" >GA17-17016S: Vliv defektů na vlastnosti biokompatibilních slitin s vysokou entropií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF MATERIALS RESEARCH

ISSN

0884-2914

e-ISSN

—

Svazek periodika

33

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

3247-3257

Kód UT WoS článku

000452650400027

EID výsledku v databázi Scopus

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