TY - JOUR
T1 - Production of tungsten-fibre reinforced tungsten composites by a novel continuous chemical vapour deposition process
AU - Gietl, H.
AU - Riesch, J.
AU - Coenen, J. W.
AU - Höschen, T.
AU - Neu, R.
N1 - Funding Information:
The authors want to acknowledge the Osram GmbH, Schwabmünchen, Germany for providing the tungsten wire and the whole W f /W team. 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 under grant agreement No. 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission.
Funding Information:
The authors want to acknowledge the Osram GmbH, Schwabm?nchen, Germany for providing the tungsten wire and the whole Wf/W team. 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 under grant agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
Publisher Copyright:
© 2019 The Authors
PY - 2019/9
Y1 - 2019/9
N2 - The brittleness below the ductile-to-brittle transition temperature and the embrittlement during operation are the main drawbacks for the use of pure tungsten in plasma facing components of fusion reactors. Tungsten fibre-reinforced tungsten composites overcome this problem by utilizing extrinsic mechanisms to improve the toughness. Dense samples (>99%) have been successfully produced by a step-wise chemical deposition process of single layers of equally spaced fibres. The sequential deposition process with intermediate vents for the fibre placement leads, however, to inhomogeneities and internal interfaces in the deposited tungsten matrix. A new set-up utilizing a continuous deposition process was developed and used for the fabrication of first samples. These samples were examined by microstructural analysis and compared to material produced by the standard technique. It is shown that this advanced set-up in combination with tungsten fabrics allows the productions of tungsten-fibre reinforced tungsten composite in a more controlled and considerably faster way.
AB - The brittleness below the ductile-to-brittle transition temperature and the embrittlement during operation are the main drawbacks for the use of pure tungsten in plasma facing components of fusion reactors. Tungsten fibre-reinforced tungsten composites overcome this problem by utilizing extrinsic mechanisms to improve the toughness. Dense samples (>99%) have been successfully produced by a step-wise chemical deposition process of single layers of equally spaced fibres. The sequential deposition process with intermediate vents for the fibre placement leads, however, to inhomogeneities and internal interfaces in the deposited tungsten matrix. A new set-up utilizing a continuous deposition process was developed and used for the fabrication of first samples. These samples were examined by microstructural analysis and compared to material produced by the standard technique. It is shown that this advanced set-up in combination with tungsten fabrics allows the productions of tungsten-fibre reinforced tungsten composite in a more controlled and considerably faster way.
KW - Chemical vapor deposition
KW - Continuous fabrication
KW - Fibre-reinforced composites
KW - Tungsten
UR - https://www.scopus.com/pages/publications/85064156876
UR - https://www.mendeley.com/catalogue/3118b981-df62-3891-a175-bd6504d1dadd/
U2 - 10.1016/j.fusengdes.2019.02.097
DO - 10.1016/j.fusengdes.2019.02.097
M3 - Article
AN - SCOPUS:85064156876
SN - 0920-3796
VL - 146
SP - 1426
EP - 1430
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -