Beneficial Effects of a WC Addition in FAST-Densified Tungsten

Novak, Sasa and Kocen, Matej and Sestan Zavasnik, Andreja and Galatanu, Andrei and Galatanu, Magdalena and Tarancón Román, Sandra and Tejado Garrido, Elena María and Pastor Caño, Jose Ignacio and Jenus, Petra (2020). Beneficial Effects of a WC Addition in FAST-Densified Tungsten. "Materials Science and Engineering: A", v. 772 ; p. 138666. ISSN 0921-5093. https://doi.org/10.1016/j.msea.2019.138666.

Description

Title: Beneficial Effects of a WC Addition in FAST-Densified Tungsten
Author/s:
  • Novak, Sasa
  • Kocen, Matej
  • Sestan Zavasnik, Andreja
  • Galatanu, Andrei
  • Galatanu, Magdalena
  • Tarancón Román, Sandra
  • Tejado Garrido, Elena María
  • Pastor Caño, Jose Ignacio
  • Jenus, Petra
Item Type: Article
Título de Revista/Publicación: Materials Science and Engineering: A
Date: 20 January 2020
ISSN: 0921-5093
Volume: 772
Subjects:
Freetext Keywords: Tungsten, Tungsten Carbide, W2C, Particle Reinforcement, FAST, Fusion Power Plants
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción, Infraestructura y Transporte
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The particle reinforcement of fusion-relevant tungsten through the incorporation of tungsten sub-carbide W2C particles at the grain boundaries is demonstrated as an effective way of eliminating the harmful W oxide, enhancing densification and stabilising the composite's microstructure and flexural strength at room and high temperatures. The W2C particles are formed in situ during the sintering by carbon diffusion from WC nanoparticles added as a precursor to the W matrix. Even in an extremely fast sintering process using Field-Assisted Sintering Technology (FAST, 1900 °C, 5 min), the added WC completely transforms to W2C, resulting in a W–W2C composite. While at least 5 vol % of WC nanoparticles are needed to eliminate the oxide, approximately 10 vol % result in a W–W2C composite with favourable characteristics: high density, high flexural strength at RT (>1200 MPa) as well as at elevated temperatures, and high thermal conductivity, which remains above 100 W/mK up to 1000 °C.

Funding Projects

TypeCodeAcronymLeaderTitle
Horizon 2020633053EUROfusionMAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EVImplementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium
Government of SpainMAT2015-70780-C4-4-PUnspecifiedUnspecifiedCompuestos cerámica-metal y aleaciones refractarias de W para su aplicación bajo condiciones de servicio severas: diseño microestructural y nuevas rutas de procesamiento
Madrid Regional GovernmentS2018/NMT-4411ADITIMAT-CMUnspecifiedUnspecified

More information

Item ID: 65108
DC Identifier: http://oa.upm.es/65108/
OAI Identifier: oai:oa.upm.es:65108
DOI: 10.1016/j.msea.2019.138666
Official URL: https://www.sciencedirect.com/science/article/pii/S0921509319314522
Deposited by: Memoria Investigacion
Deposited on: 30 Oct 2020 15:44
Last Modified: 30 Oct 2020 15:44
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