Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods
Tungsten features a unique combination of properties which makes it a candidate for the use as a plasma-facing material in fusion reactors. The main drawbacks of tungsten are its brittleness at moderate temperature and the susceptibility to embrittlement during operation. To overcome this limitation...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179121001289 |
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| author | H. Gietl J. Riesch M. Zielinski T. Höschen J.W. Coenen S. Schönen R. Neu |
| author_facet | H. Gietl J. Riesch M. Zielinski T. Höschen J.W. Coenen S. Schönen R. Neu |
| author_sort | H. Gietl |
| collection | DOAJ |
| description | Tungsten features a unique combination of properties which makes it a candidate for the use as a plasma-facing material in fusion reactors. The main drawbacks of tungsten are its brittleness at moderate temperature and the susceptibility to embrittlement during operation. To overcome this limitations tungsten fibre-reinforced tungsten composites (Wf/W) have been developed. The interlayer between the tungsten fibre and tungsten matrix enables the activation of extrinsic mechanisms to improve the toughness similar to ceramic fibre-reinforced ceramics. In addition, the evaluation of the interlayer parameter is a necessary for the efforts to model the composite behaviour. Therefore, single fibre model systems with Er2O3and Y2O3as interlayer were evaluated by push-out and pull-out tests. The results were used to determine the interfacial shear strength (τdeb), the interfacial frictional shear stress (τfr) and the fracture energy of the interlayer (Γi). In addition, tensile tests on the composite material were performed to evaluate the interfacial frictional shear stress. The evaluation methods were critically discussed as the results show that the influence of the evaluation method is larger than the actual tested interlayer material. |
| first_indexed | 2024-12-22T10:01:49Z |
| format | Article |
| id | doaj.art-f9e3f2c38fb947f78495de4ff0b06d2c |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-22T10:01:49Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-f9e3f2c38fb947f78495de4ff0b06d2c2022-12-21T18:30:06ZengElsevierNuclear Materials and Energy2352-17912021-09-0128101060Interlayer properties of tungsten fibre-reinforced composites and their determination by different methodsH. Gietl0J. Riesch1M. Zielinski2T. Höschen3J.W. Coenen4S. Schönen5R. Neu6Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA; Corresponding authors.Max–Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85748 Garching, Germany; Corresponding authors.Max–Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85748 Garching, GermanyMax–Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85748 Garching, GermanyForschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany; Department of engineering physics, University of Wisconsin Madison, WI 53706 Madison, USAForschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, GermanyMax–Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85748 Garching, Germany; Technische Universität München, Boltzmannstrasse 15, 85748 Garching, GermanyTungsten features a unique combination of properties which makes it a candidate for the use as a plasma-facing material in fusion reactors. The main drawbacks of tungsten are its brittleness at moderate temperature and the susceptibility to embrittlement during operation. To overcome this limitations tungsten fibre-reinforced tungsten composites (Wf/W) have been developed. The interlayer between the tungsten fibre and tungsten matrix enables the activation of extrinsic mechanisms to improve the toughness similar to ceramic fibre-reinforced ceramics. In addition, the evaluation of the interlayer parameter is a necessary for the efforts to model the composite behaviour. Therefore, single fibre model systems with Er2O3and Y2O3as interlayer were evaluated by push-out and pull-out tests. The results were used to determine the interfacial shear strength (τdeb), the interfacial frictional shear stress (τfr) and the fracture energy of the interlayer (Γi). In addition, tensile tests on the composite material were performed to evaluate the interfacial frictional shear stress. The evaluation methods were critically discussed as the results show that the influence of the evaluation method is larger than the actual tested interlayer material.http://www.sciencedirect.com/science/article/pii/S2352179121001289Metal–matrix composites (MMCs)Interface/interphaseMechanical properties/testing |
| spellingShingle | H. Gietl J. Riesch M. Zielinski T. Höschen J.W. Coenen S. Schönen R. Neu Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods Nuclear Materials and Energy Metal–matrix composites (MMCs) Interface/interphase Mechanical properties/testing |
| title | Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods |
| title_full | Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods |
| title_fullStr | Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods |
| title_full_unstemmed | Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods |
| title_short | Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods |
| title_sort | interlayer properties of tungsten fibre reinforced composites and their determination by different methods |
| topic | Metal–matrix composites (MMCs) Interface/interphase Mechanical properties/testing |
| url | http://www.sciencedirect.com/science/article/pii/S2352179121001289 |
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