On thermal stability and oxidation behavior of metastable W–Zr thin-film alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F22%3A43965505" target="_blank" >RIV/49777513:23520/22:43965505 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jallcom.2022.166599" target="_blank" >https://doi.org/10.1016/j.jallcom.2022.166599</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2022.166599" target="_blank" >10.1016/j.jallcom.2022.166599</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On thermal stability and oxidation behavior of metastable W–Zr thin-film alloys

Popis výsledku v původním jazyce

The thermal stability and oxidation behavior of metastable W–Zr thin-film alloys with up to 83 at. % Zr were thoroughly investigated with a focus on the effect of gradual substitution of Zr for W. The films were prepared by dc magnetron co-sputtering of W and Zr targets in argon on unheated and unbiased substrates. The experiments showed that a supersaturated α-W(Zr) solid solution structure of as-deposited W-rich films with up to 19 at. % Zr is highly thermally stable up to 1200 °C in argon and the thermal stability of the W–Zr thin-film metallic glasses (33–83 at. % Zr) decreases with increasing Zr content. Nevertheless, the thermal stability of the W–Zr thin-film metallic glass with 33 at. % Zr reaches 1420 °C, which is very high value for binary metallic glass. The annealing of W-rich films (0–24 at. % Zr) in air leads to the formation of a protective surface oxide layer, which serves as a more effective oxygen diffusion barrier due to an increasing packing factor and amorphization with Zr addition. On the other hand, no protective surface oxide layer is grown during the annealing in air in the case of the W–Zr thin-film metallic glasses and the oxidation leads to the formation of compact, homogeneously oxidized substoichiometric W–Zr–O films with an amorphous structure and enhanced mechanical properties before reaching the final mass gain.

Název v anglickém jazyce

On thermal stability and oxidation behavior of metastable W–Zr thin-film alloys

Popis výsledku anglicky

The thermal stability and oxidation behavior of metastable W–Zr thin-film alloys with up to 83 at. % Zr were thoroughly investigated with a focus on the effect of gradual substitution of Zr for W. The films were prepared by dc magnetron co-sputtering of W and Zr targets in argon on unheated and unbiased substrates. The experiments showed that a supersaturated α-W(Zr) solid solution structure of as-deposited W-rich films with up to 19 at. % Zr is highly thermally stable up to 1200 °C in argon and the thermal stability of the W–Zr thin-film metallic glasses (33–83 at. % Zr) decreases with increasing Zr content. Nevertheless, the thermal stability of the W–Zr thin-film metallic glass with 33 at. % Zr reaches 1420 °C, which is very high value for binary metallic glass. The annealing of W-rich films (0–24 at. % Zr) in air leads to the formation of a protective surface oxide layer, which serves as a more effective oxygen diffusion barrier due to an increasing packing factor and amorphization with Zr addition. On the other hand, no protective surface oxide layer is grown during the annealing in air in the case of the W–Zr thin-film metallic glasses and the oxidation leads to the formation of compact, homogeneously oxidized substoichiometric W–Zr–O films with an amorphous structure and enhanced mechanical properties before reaching the final mass gain.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA22-18760S" target="_blank" >GA22-18760S: Nové funkční tenkovrstvé materiály na bázi kovových skel a duální fázové struktury</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

925

Číslo periodika v rámci svazku

5 DEC 2022

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

"166599-1"-"166599-8"

Kód UT WoS článku

000848385200001

EID výsledku v databázi Scopus

2-s2.0-85135802933