Metastable structures in magnetron sputtered W–Zr thin-film alloys: properties and thermal behavior

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F21%3A43963314" target="_blank" >RIV/49777513:23520/21:43963314 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Metastable structures in magnetron sputtered W–Zr thin-film alloys: properties and thermal behavior

Popis výsledku v původním jazyce

The work focuses on preparation of thin-film metallic alloys from the W–Zr system by non-reactive magnetron sputtering and investigation of their structure, properties, and thermal behavior. We were able to prepare W–Zr thin-film alloys with several metastable structures in respect to the equilibrium phase diagram. Up to 24 at.% Zr, the structure is characterized by a supersaturated bcc α-W(Zr) solid solution with a highly oriented structure, columnar microstructure, enhanced hardness and very low residual stress. In the range between 33 and 83 at.% Zr, an amorphous structure with features indicating metallic glass behavior is observed. These films exhibit a very smooth surface, moderate compressive stress, and constant electrical resistivity. Above 83 at.% Zr, high-temperature bcc β-Zr(W) and high-pressure hcp ω-Zr(W) phases with an enhanced hardness are prepared. Moreover, an interesting dual structure with crystalline conical domains surrounded by a metallic glass is formed at 28 at.% Zr.

Název v anglickém jazyce

Metastable structures in magnetron sputtered W–Zr thin-film alloys: properties and thermal behavior

Popis výsledku anglicky

The work focuses on preparation of thin-film metallic alloys from the W–Zr system by non-reactive magnetron sputtering and investigation of their structure, properties, and thermal behavior. We were able to prepare W–Zr thin-film alloys with several metastable structures in respect to the equilibrium phase diagram. Up to 24 at.% Zr, the structure is characterized by a supersaturated bcc α-W(Zr) solid solution with a highly oriented structure, columnar microstructure, enhanced hardness and very low residual stress. In the range between 33 and 83 at.% Zr, an amorphous structure with features indicating metallic glass behavior is observed. These films exhibit a very smooth surface, moderate compressive stress, and constant electrical resistivity. Above 83 at.% Zr, high-temperature bcc β-Zr(W) and high-pressure hcp ω-Zr(W) phases with an enhanced hardness are prepared. Moreover, an interesting dual structure with crystalline conical domains surrounded by a metallic glass is formed at 28 at.% Zr.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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