Enhanced tungsten densification via modified Field-Assisted Sintering

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00645693" target="_blank" >RIV/61389021:_____/25:00645693 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352492825014515" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352492825014515</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtcomm.2025.112939" target="_blank" >10.1016/j.mtcomm.2025.112939</a>

Result language

angličtina

Original language name

Enhanced tungsten densification via modified Field-Assisted Sintering

Original language description

Field-assisted sintering (FAST) is a promising method for achieving high-density materials from powders. Its potential for producing tungsten with suitable properties for plasma-facing components (PFCs) in fusion reactors has recently garnered significant attention. While FAST offers advantages over traditional powder metallurgy, it is hindered by limitations including the maximum achievable current density passing through the specimen, which can restrict material improvements. This study presents a straightforward method to significantly increase current density by encapsulating tungsten powder within a graphite foil coated with electrically insulating boron nitride on one side. The resulting tungsten specimens exhibited improved microstructural and mechanical properties compared to those sintered using standard graphite foil. This enhancement is attributed to increased current density, facilitating densification and local temperature elevation. While elevated carbon saturation and minor tungsten carbide formation occurred, their impact on mechanical properties was negligible due to their confinement to the specimen edges. Moreover, our study demonstrates that modifying a single sintering parameter significantly influences tungsten properties, enabling tailored material characteristics. Decreasing sintering temperature or duration resulted in suboptimal material properties. Conversely, extending the sintering time or employing a vacuum atmosphere significantly enhanced tungsten density and improved the overall mechanical properties. These findings highlight the versatility of our approach, which can be adapted to various FAST configurations for producing tungsten components potentially suitable for PFCs applications.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20506 - Coating and films

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Materials Today Communications

ISSN

2352-4928

e-ISSN

2352-4928

Volume of the periodical

46

Issue of the periodical within the volume

June

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

112939

UT code for WoS article

001507544400001

EID of the result in the Scopus database

2-s2.0-105006478593