Microstructure and phase stability of W-Cr alloy prepared by spark plasma sintering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00489500" target="_blank" >RIV/61389021:_____/18:00489500 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/18:43917076

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.fusengdes.2018.01.012" target="_blank" >http://dx.doi.org/10.1016/j.fusengdes.2018.01.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fusengdes.2018.01.012" target="_blank" >10.1016/j.fusengdes.2018.01.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure and phase stability of W-Cr alloy prepared by spark plasma sintering

Popis výsledku v původním jazyce

Tungsten alloys currently represent prospective candidates to replace tungsten in the first wall applications in future fusion facilities. Tungsten has many advantageous features, however, it is rather susceptible to oxidation at temperatures above around 500 degrees C. To mitigate/suppress this, various oxide-forming elements are being added to tungsten to induce self-passivation. The most common ones are chromium, titanium and silicon. The alloyed powder is frequently prepared by mechanical alloying and then consolidated by a sintering method. Most of the published results are related to alloys consolidated by HIP process that leads to formation of multiphase material. In the presented study, W-10Cr alloy with hafnium oxide particle dispersion was prepared by spark plasma sintering. Unique features of the microstructure are discussed and compared with other processing methods Phase and thermal stability of the alloy was evaluated at three fusion-relevant temperatures using detailed X-ray diffraction analysis, differential thermal analysis and microstructural observations in a scanning electron microscope. Impact of the heat treatment on crucial properties such as thermal conductivity and heat capacity was evaluated.

Název v anglickém jazyce

Microstructure and phase stability of W-Cr alloy prepared by spark plasma sintering

Popis výsledku anglicky

Tungsten alloys currently represent prospective candidates to replace tungsten in the first wall applications in future fusion facilities. Tungsten has many advantageous features, however, it is rather susceptible to oxidation at temperatures above around 500 degrees C. To mitigate/suppress this, various oxide-forming elements are being added to tungsten to induce self-passivation. The most common ones are chromium, titanium and silicon. The alloyed powder is frequently prepared by mechanical alloying and then consolidated by a sintering method. Most of the published results are related to alloys consolidated by HIP process that leads to formation of multiphase material. In the presented study, W-10Cr alloy with hafnium oxide particle dispersion was prepared by spark plasma sintering. Unique features of the microstructure are discussed and compared with other processing methods Phase and thermal stability of the alloy was evaluated at three fusion-relevant temperatures using detailed X-ray diffraction analysis, differential thermal analysis and microstructural observations in a scanning electron microscope. Impact of the heat treatment on crucial properties such as thermal conductivity and heat capacity was evaluated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA17-23964S" target="_blank" >GA17-23964S: Disperzně zpevněné vysoce entropické slitiny pro použití za extrémních podmínek</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

Fusion Engineering and Design

ISSN

0920-3796

e-ISSN

—

Svazek periodika

127

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

173-178

Kód UT WoS článku

000427343200023

EID výsledku v databázi Scopus

2-s2.0-85040055266