TY - JOUR
T1 - Interlayer properties of tungsten fibre-reinforced composites and their determination by different methods
AU - Gietl, H.
AU - Riesch, J.
AU - Zielinski, M.
AU - Höschen, T.
AU - Coenen, J. W.
AU - Schönen, S.
AU - Neu, R.
N1 - Funding Information:
Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE) . The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
Funding Information:
The authors want to acknowledge the Osram GmbH, Schwabmünchen, Germany for providing the W wire and the whole W f /W team for the fruitful collaboration. I also thank Ying Yang from the Oak Ridge National Laboratory. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission. Research sponsored by the U.S. Department of Energy, Office of Fusion Energy Sciences , under contract DE-AC05-00OR22725 with UT-Battelle, LLC.
Funding Information:
Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).The authors want to acknowledge the Osram GmbH, Schwabm?nchen, Germany for providing the W wire and the whole Wf/W team for the fruitful collaboration. I also thank Ying Yang from the Oak Ridge National Laboratory. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014?2018 and 2019?2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Research sponsored by the U.S. Department of Energy, Office of Fusion Energy Sciences, under contract DE-AC05-00OR22725 with UT-Battelle, LLC.
Publisher Copyright:
© 2021
PY - 2021/9
Y1 - 2021/9
N2 - 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 Er2O3 and Y2O3 as 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.
AB - 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 Er2O3 and Y2O3 as 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.
KW - Interface/interphase
KW - Mechanical properties/testing
KW - Metal–matrix composites (MMCs)
UR - http://www.scopus.com/inward/record.url?scp=85122445272&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/664470aa-19b0-3371-9c4e-f5e6c450ed36/
U2 - 10.1016/j.nme.2021.101060
DO - 10.1016/j.nme.2021.101060
M3 - Article
AN - SCOPUS:85122445272
SN - 2352-1791
VL - 28
JO - Nuclear Materials and Energy
JF - Nuclear Materials and Energy
M1 - 101060
ER -