%0 Journal Article
%A Mao, Y.
%A Coenen, J. W.
%A Riesch, J.
%A Sistla, S.
%A Almanstötter, J.
%A Jasper, B.
%A Terra, A.
%A Höschen, T.
%A Gietl, H.
%A Linsmeier, Ch.
%A Broeckmann, C.
%T Influence of the interface strength on the mechanical properties of discontinuous tungsten fiber-reinforced tungsten composites produced by field assisted sintering technology
%J Composites / A
%V 107
%@ 1359-835X
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2021-01519
%P 342 - 353
%D 2018
%X In future fusion reactors, tungsten is a main candidate material for plasma-facing components. However, the intrinsic brittleness of tungsten is an issue under the extreme fusion environment. To overcome this drawback, tungsten fiber-reinforced tungsten (Wf/W) composites are being developed relying on an extrinsic toughening principle. In this study Wf/W composites are produced by a Field-Assisted Sintering Technology (FAST) process with different fiber–matrix interfaces. The fracture behavior was studied by 3-point bending tests on notched samples. 4-point bending tests and tensile tests are performed to measure the flexural strength and tensile strength, respectively. Wf/W with a weak interface shows a typical pseudo-ductile fracture behavior, similar to ceramic matrix composites. A strong interface is beneficial to achieve higher flexural strength and tensile strength, but in turn, weakens the pseudo-ductile behavior.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000429892800036
%R 10.1016/j.compositesa.2018.01.022
%U https://juser.fz-juelich.de/record/891434