Ultrafine-grained Cu50(FeCo)50 immiscible alloy with excellent thermal stability

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F21%3APU142488" target="_blank" >RIV/00216305:26210/21:PU142488 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1044580321006549" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1044580321006549</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2021.111532" target="_blank" >10.1016/j.matchar.2021.111532</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultrafine-grained Cu50(FeCo)50 immiscible alloy with excellent thermal stability

Popis výsledku v původním jazyce

This work deals with the microstructural characterization of bulk Cu50(FeCo)50 immiscible alloy prepared by mechanical alloying and spark plasma sintering. The microstructure evolution is investigated from milled powder through sintering to annealing at temperatures of 800 °C and 980 °C for 3 h. Despite the immiscibility of Cu with Fe and Co, the FCC supersaturated solid solution was formed upon mechanical alloying. During sintering, the supersaturated solid solution decomposed into a fine microstructure composed of Cu-rich and FeCo-rich phases. However, the equilibrium microstructure was not reached even during annealing when, in addition to FCC Cu-rich phases and BCC FeCo-rich phases, FCC FeCo-rich phases with increased Cu content were present in the microstructure. The average grain size of 0.35 μm after sintering increased to 0.85 μm after annealing at a temperature corresponding to 90% of the melting point. Thus, the Cu50(FeCo)50 alloy exhibits excellent thermal stability compared to other ultrafine-grained materials, which is caused due to its immiscible nature.

Název v anglickém jazyce

Ultrafine-grained Cu50(FeCo)50 immiscible alloy with excellent thermal stability

Popis výsledku anglicky

This work deals with the microstructural characterization of bulk Cu50(FeCo)50 immiscible alloy prepared by mechanical alloying and spark plasma sintering. The microstructure evolution is investigated from milled powder through sintering to annealing at temperatures of 800 °C and 980 °C for 3 h. Despite the immiscibility of Cu with Fe and Co, the FCC supersaturated solid solution was formed upon mechanical alloying. During sintering, the supersaturated solid solution decomposed into a fine microstructure composed of Cu-rich and FeCo-rich phases. However, the equilibrium microstructure was not reached even during annealing when, in addition to FCC Cu-rich phases and BCC FeCo-rich phases, FCC FeCo-rich phases with increased Cu content were present in the microstructure. The average grain size of 0.35 μm after sintering increased to 0.85 μm after annealing at a temperature corresponding to 90% of the melting point. Thus, the Cu50(FeCo)50 alloy exhibits excellent thermal stability compared to other ultrafine-grained materials, which is caused due to its immiscible nature.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

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

Název periodika

MATERIALS CHARACTERIZATION

ISSN

1044-5803

e-ISSN

1873-4189

Svazek periodika

182

Číslo periodika v rámci svazku

111532

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

111532-111532

Kód UT WoS článku

000715807800002

EID výsledku v databázi Scopus

2-s2.0-85118584953