TY - JOUR
T1 - Fiber Volume Fraction Influence on Randomly Distributed Short Fiber Tungsten Fiber-Reinforced Tungsten Composites
AU - Mao, Yiran
AU - Coenen, Jan W.
AU - Riesch, Johann
AU - Sistla, Sree
AU - Almanstötter, Jürgen
AU - Terra, Alexis
AU - Chen, Chang
AU - Wu, Yucheng
AU - Raumann, Leonard
AU - Höschen, Till
AU - Gietl, Hanns
AU - Neu, Rudolf
AU - Broeckmann, Christoph
AU - Linsmeier, Christian
N1 - Funding Information:
This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training program 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.
Publisher Copyright:
© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/6/1
Y1 - 2020/6/1
N2 - For future fusion reactors, tungsten (W) is currently the main candidate for the application as plasma-facing material due to its several advanced properties. To overcome the brittleness of W, randomly distributed short W fiber-reinforced W (Wf/W) composites have been developed using field-assisted sintering technology (FAST). Herein, Wf/W materials with different fiber volume fraction (20–60%) are manufactured by FAST process to study the fiber volume fraction influence on the composite properties. Wf/W with ductile fibers and brittle fibers is produced using different tool setups during the production. Three-point bending tests on prenotched samples, 4-point bending tests, and tensile tests have been performed to determine the fracture behavior and flexural/tensile strength of the material. Wf/W materials with 30–40% fiber volume fraction exhibit a promising pseudoductile behavior, similar to fiber-reinforced ceramic composites. However, Wf/W with 20% and >50% fiber volume fraction shows only a limited extrinsic toughening effect. In terms of flexural strength, with increasing fiber volume fraction, the tensile/flexural strength does not show a clear increasing tendency, or even lightly decreases.
AB - For future fusion reactors, tungsten (W) is currently the main candidate for the application as plasma-facing material due to its several advanced properties. To overcome the brittleness of W, randomly distributed short W fiber-reinforced W (Wf/W) composites have been developed using field-assisted sintering technology (FAST). Herein, Wf/W materials with different fiber volume fraction (20–60%) are manufactured by FAST process to study the fiber volume fraction influence on the composite properties. Wf/W with ductile fibers and brittle fibers is produced using different tool setups during the production. Three-point bending tests on prenotched samples, 4-point bending tests, and tensile tests have been performed to determine the fracture behavior and flexural/tensile strength of the material. Wf/W materials with 30–40% fiber volume fraction exhibit a promising pseudoductile behavior, similar to fiber-reinforced ceramic composites. However, Wf/W with 20% and >50% fiber volume fraction shows only a limited extrinsic toughening effect. In terms of flexural strength, with increasing fiber volume fraction, the tensile/flexural strength does not show a clear increasing tendency, or even lightly decreases.
KW - fiber volume fraction
KW - fracture behavior
KW - strength
KW - tungsten fiber-reinforced tungsten composites
UR - https://www.scopus.com/pages/publications/85082439391
UR - https://www.mendeley.com/catalogue/d947a258-0c02-326d-9bfd-7179d58bf9f3/
U2 - 10.1002/adem.201901242
DO - 10.1002/adem.201901242
M3 - Article
AN - SCOPUS:85082439391
SN - 1438-1656
VL - 22
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 6
M1 - 1901242
ER -