TY  - JOUR
AU  - Mao, Y.
AU  - Coenen, J. W.
AU  - Riesch, J.
AU  - Sistla, S.
AU  - Almanstötter, J.
AU  - Jasper, B.
AU  - Terra, A.
AU  - Höschen, T.
AU  - Gietl, H.
AU  - Linsmeier, Ch.
AU  - Broeckmann, C.
TI  - Influence of the interface strength on the mechanical properties of discontinuous tungsten fiber-reinforced tungsten composites produced by field assisted sintering technology
JO  - Composites / A
VL  - 107
SN  - 1359-835X
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2021-01519
SP  - 342 - 353
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000429892800036
DO  - DOI:10.1016/j.compositesa.2018.01.022
UR  - https://juser.fz-juelich.de/record/891434
ER  -