High-temperature tribological properties of high entropy alloy HfNbTaTiZr strengthened by nitride dispersion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00369072" target="_blank" >RIV/68407700:21220/23:00369072 - 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

High-temperature tribological properties of high entropy alloy HfNbTaTiZr strengthened by nitride dispersion

Popis výsledku v původním jazyce

Refractory high-entropy alloys are a perspective kind of material for high-temperature applications due to their excellent mechanical properties as well as the ability to maintain these properties at high temperatures. Due to the large number of parameters influencing the final properties of HEA, available literature gives only limited information about the functional properties of individual alloys. In this study, refractory high entropy alloy HfNbTaTiZr powder was prepared by the process of Mechanical Alloying (MA). During the process of mechanical alloying, the powder was doped with nitrogen for varying times. Powders were further sintered by Spark Plasma Sintering (SPS). Varying doping times resulted in different nitrogen contents in the final materials. Tribological properties at high temperatures were tested at room temperature and at a temperature of 800 °C. The influence of nitrogen content and sintering temperature on friction and wear rate, as well as the wear mechanism, are discussed.

Název v anglickém jazyce

High-temperature tribological properties of high entropy alloy HfNbTaTiZr strengthened by nitride dispersion

Popis výsledku anglicky

Refractory high-entropy alloys are a perspective kind of material for high-temperature applications due to their excellent mechanical properties as well as the ability to maintain these properties at high temperatures. Due to the large number of parameters influencing the final properties of HEA, available literature gives only limited information about the functional properties of individual alloys. In this study, refractory high entropy alloy HfNbTaTiZr powder was prepared by the process of Mechanical Alloying (MA). During the process of mechanical alloying, the powder was doped with nitrogen for varying times. Powders were further sintered by Spark Plasma Sintering (SPS). Varying doping times resulted in different nitrogen contents in the final materials. Tribological properties at high temperatures were tested at room temperature and at a temperature of 800 °C. The influence of nitrogen content and sintering temperature on friction and wear rate, as well as the wear mechanism, are discussed.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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