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| 001 | 1008445 | ||
| 005 | 20240711113544.0 | ||
| 024 | 7 | _ | |a 10.3390/jne4020027 |2 doi |
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| 037 | _ | _ | |a FZJ-2023-02345 |
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| 100 | 1 | _ | |a Lau, Alexander |0 P:(DE-Juel1)188382 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Bulk Tungsten Fiber-Reinforced Tungsten (Wf/W) Composites Using Yarn-Based Textile Preforms |
| 260 | _ | _ | |a Basel |c 2023 |b MDPI |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The use of tungsten fiber-reinforced tungsten composites (Wf/W) has been demonstrated to significantly enhance the mechanical properties of tungsten (W) by incorporating W-fibers into the W-matrix. However, prior research has been restricted by the usage of single fiber-based textile fabrics, consisting of 150 µm warp and 50 µm weft filaments, with limited homogeneity, reproducibility, and mechanical properties in bulk structures due to the rigidity of the 150 µm W-fibers. To overcome this limitation, two novel textile preforms were developed utilizing radial braided W-yarns with 7 core and 16 sleeve filaments (R.B. 16 + 7), with a diameter of 25 µm each, as the warp material. In this study, bulk composites of two different fabric types were produced via a layer-by-layer CVD process, utilizing single 50 µm filaments (type 1) and R.B. 16 + 7 yarns (type 2) as weft materials. The produced composites were sectioned into KLST-type specimens based on DIN EN ISO 179-1:2000 using electrical discharge machining (EDM) and subjected to three-point bending tests. Both composites demonstrated enhanced mechanical properties with pseudo-ductile behavior at room temperature and withstood over 10,000 load cycles between 50–90% of their respective maximum load without sample fracture in three-point cyclic loading tests. Furthermore, a novel approach to predict the fatigue behavior of the material under cyclic loading was developed based on the high reproducibility of the composites produced, especially for the composite based on type 1. This approach provides a new benchmark for upscaling endeavors and may enable a better prediction of the service life of the produced components made of Wf/W in the future. In comparison, the composite based on fabric type 1 demonstrated superior results in manufacturing performance and mechanical properties. With a high relative average density (>97%), a high fiber volume fraction (14–17%), and a very homogeneous fiber distribution in the CVD-W matrix, type 1 shows a promising option to be further tested in high heat flux tests and to be potentially used as an alternative to currently used materials for the most stressed components of nuclear fusion reactors or other potential application fields such as concentrated solar power (CSP), aircraft turbines, the steel industry, quantum computing, or welding tools. Type 2 composites have a higher layer spacing compared to type 1, resulting in gaps within the matrix and less homogeneous material properties. While type 2 composites have demonstrated a notable enhancement over 150 µm fiber-based composites, they are not viable for industrial scale-up unlike type 1 composites. |
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| 700 | 1 | _ | |a Coenen, Jan Willem |0 P:(DE-Juel1)2594 |b 1 |
| 700 | 1 | _ | |a Schwalenberg, Daniel |0 P:(DE-Juel1)174255 |b 2 |
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| 700 | 1 | _ | |a Höschen, Till |0 0000-0002-4966-1091 |b 4 |
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| 700 | 1 | _ | |a Raumann, Leonard |0 P:(DE-Juel1)169774 |b 6 |
| 700 | 1 | _ | |a Treitz, Michael |b 7 |
| 700 | 1 | _ | |a Gietl, Hanns |0 0000-0002-4986-4198 |b 8 |
| 700 | 1 | _ | |a Terra, Alexis |b 9 |
| 700 | 1 | _ | |a Göhts, Beatrix |b 10 |
| 700 | 1 | _ | |a Linsmeier, Christian |0 P:(DE-Juel1)157640 |b 11 |
| 700 | 1 | _ | |a Theis-Bröhl, Katharina |0 0000-0002-9218-5588 |b 12 |
| 700 | 1 | _ | |a Gonzalez-Julian, Jesus |0 P:(DE-Juel1)162271 |b 13 |
| 773 | _ | _ | |a 10.3390/jne4020027 |g Vol. 4, no. 2, p. 375 - 390 |0 PERI:(DE-600)3040700-X |n 2 |p 375 - 390 |t Journal of nuclear engineering |v 4 |y 2023 |x 2673-4362 |
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