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| 001 | 866495 | ||
| 005 | 20240711114023.0 | ||
| 024 | 7 | _ | |a 10.1016/j.nme.2018.05.001 |2 doi |
| 024 | 7 | _ | |a 2128/23380 |2 Handle |
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| 100 | 1 | _ | |a Coenen, J. W. |0 P:(DE-Juel1)2594 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Improved pseudo-ductile behavior of powder metallurgical tungsten short fiber-reinforced tungsten (W/W) |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2018 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a For the first wall of a fusion reactor unique challenges on materials in extreme environments require advanced features in areas ranging from mechanical strength to thermal properties. The main challenges include wall lifetime, erosion, fuel management and overall safety. For the lifetime of the wall material, considerations of thermal fatigue due to transient heat loading are crucial as severe mechanical and thermal loads during operation are expected.Tungsten (W) is the main candidate material for the first wall of a fusion reactor as it is resilient against erosion, has the highest melting point of any metal and shows rather benign transmutation behavior under neutron irradiation. However, Tungsten has an issue related to intrinsic brittleness as well as operational embrittlement. To overcome this, a W-fiber enhanced W-composite material (Wf/W) incorporating extrinsic toughening mechanisms has been developed. Recently progress has been made in the powder metallurgical routes towards fully dense multi short-fiber Wf/W. For reasonable performance with respect to mechanical properties and hydrogen retention a fully dense pseudo-ductile Wf/W with is crucial. The properties of the used fibres are crucial. For the composite mechanisms to work a level of strength of the used fibres is required. In this contribution the change in ductility of the fibres is studied.In this contribution it is shown that excluding or minimising the impact of carbon impurities during the sintering process can significantly improve the mechanical properties of the fibres. New test results on the behaviour of PM Wf/W with and without a diffusion barrier during the sintering show a clear benefit as the fibres can retain ductility. Not the grain growth during sintering but the carbon present during sintering is clearly identified as determining the mechanical properties of the fibres. Previous article in issue |
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| 700 | 1 | _ | |a Hoeschen, T. |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Broeckmann, Ch. |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Neu, R. |0 0000-0002-6062-1955 |b 6 |
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| 773 | _ | _ | |a 10.1016/j.nme.2018.05.001 |g Vol. 15, p. 214 - 219 |0 PERI:(DE-600)2808888-8 |p 214 - 219 |t Nuclear materials and energy |v 15 |y 2018 |x 2352-1791 |
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