This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2017/T170/014005 in citations.
Development and characterization of powder metallurgically produced discontinuous tungsten fiber reinforced tungsten composites
Development and characterization of powder metallurgically produced discontinuous tungsten fiber reinforced tungsten composites
In future fusion reactors, tungsten is the prime candidate material for the plasma facing components. Nevertheless, tungsten is prone to develop cracks due to its intrinsic brittleness—a major concern under the extreme conditions of fusion environment. To overcome this drawback, tungsten fiber reinf...
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Personal Name(s): | Mao, Yiran (Corresponding author) |
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Coenen, Jan Willem / Riesch, J. / Sistla, S. / Almanstötter, J. / Jasper, Bruno / Terra, Alexis / Höschen, T. / Gietl, H. / Bram, Martin / Gonzales, Jesus / Linsmeier, Christian / Broeckmann, C. | |
Contributing Institute: |
Plasmaphysik; IEK-4 Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Physica scripta, 2017 (2017) S. 7 / 014005 |
Imprint: |
Bristol
IoP Publ.
2017
|
DOI: |
10.1088/0031-8949/2017/T170/014005 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Plasma-Wall-Interaction |
Publikationsportal JuSER |
In future fusion reactors, tungsten is the prime candidate material for the plasma facing components. Nevertheless, tungsten is prone to develop cracks due to its intrinsic brittleness—a major concern under the extreme conditions of fusion environment. To overcome this drawback, tungsten fiber reinforced tungsten (Wf/W) composites are being developed. These composite materials rely on an extrinsic toughing principle, similar to those in ceramic matrix composite, using internal energy dissipation mechanisms, such as crack bridging and fiber pull-out, during crack propagation. This can help Wf/W to facilitate a pseudo-ductile behavior and allows an elevated damage resilience compared to pure W. For pseudo-ductility mechanisms to occur, the interface between the fiber and matrix is crucial. Recent developments in the area of powder-metallurgical Wf/W are presented. Two consolidation methods are compared. Field assisted sintering technology and hot isostatic pressing are chosen to manufacture the Wf/W composites. Initial mechanical tests and microstructural analyses are performed on the Wf/W composites with a 30% fiber volume fraction. The samples produced by both processes can give pseudo-ductile behavior at room temperature. |