Effect of the heating rate and Y2O3 coating on the microstructure of Wf/Y2O3/W composites via field assisted sintering technology

Rui Shu; Yiran Mao; Alexander Lau; Jan W Coenen; Alexis Terra; Chao Liu; Johann Riesch; Christian Linsmeier; Christoph Broeckmann

Nuclear Materials and Energy (Mar 2024)

Effect of the heating rate and Y2O3 coating on the microstructure of Wf/Y2O3/W composites via field assisted sintering technology

Rui Shu,
Yiran Mao,
Alexander Lau,
Jan W Coenen,
Alexis Terra,
Chao Liu,
Johann Riesch,
Christian Linsmeier,
Christoph Broeckmann

Affiliations

Rui Shu: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany; Institut für Werkstoffanwendungen im Maschinenbau (IWM), RWTH Aachen University, 52062 Aachen, Germany; Corresponding author.
Yiran Mao: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany
Alexander Lau: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany
Jan W Coenen: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany; Department of Nuclear Engineering & Engineering Physics, University of Wisconsin Madison, Madison, WI 53706 Madison, USA
Alexis Terra: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany
Chao Liu: Institut für Werkstoffanwendungen im Maschinenbau (IWM), RWTH Aachen University, 52062 Aachen, Germany
Johann Riesch: Max-Planck-Institut für Plasmaphysik, 85748 Garching b. München, Germany
Christian Linsmeier: Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany
Christoph Broeckmann: Institut für Werkstoffanwendungen im Maschinenbau (IWM), RWTH Aachen University, 52062 Aachen, Germany

Journal volume & issue: Vol. 38
p. 101602

Abstract

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Field assisted sintering technology (FAST) is one of the potential methods to fabricate tungsten fiber reinforced tungsten (Wf/W) composites. The microstructure and mechanical properties of Wf/W composites are closely related to the sintering parameters. In the present work, the Wf/W composites with a Y2O3 coating on the fiber (Wf/Y2O3/W) were fabricated via a FAST process and the microstructure was characterized. The influence of the heating rate and Y2O3 coating on the microstructure of Wf/Y2O3/W composites was discussed in detail. It is observed that the Y2O3 coating can get damaged and move into the adjacent matrix. A higher heating rate (100 ℃/min) causes more serious damage on the Y2O3 coating which could be attributed to the higher electric current intensity. The samples produced with a lower heating rate (50 ℃/min) or with a thicker Y2O3 coating (3 µm) show an interface with better continuity. In addition, the integrity of the Y2O3 coating could by protected by an additional W-coating produced by chemical vapor deposition (CVD).

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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