TY  - JOUR
AU  - Ganesh, Vishnu
AU  - Dorow-Gerspach, Daniel
AU  - Heuer, Simon
AU  - Matejicek, Jiri
AU  - Vilemova, Monika
AU  - Bram, Martin
AU  - Coenen, Jan Willem
AU  - Wirtz, Marius
AU  - Pintsuk, Gerald
AU  - Theisen, Werner
AU  - Linsmeier, Christian
TI  - Manufacturing of W-steel joint using plasma sprayed graded W/steel-interlayer with current assisted diffusion bonding
JO  - Fusion engineering and design
VL  - 172
SN  - 0920-3796
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2021-03882
SP  - 112896 -
PY  - 2021
AB  - The differences in the thermophysical properties between tungsten and steel create thermal stress peaks at its interface when joined directly for the breeding blanket of a fusion reactor. In order to solve this problem, a graded interlayer made of several layers of W/steel-composites is considered to reduce these stress peaks. Plasma spraying under an argon shrouded chamber was employed as a cost efficient manufacturing technique for such composites and field assisted sintering technology/spark plasma sintering was used to diffusion bond them with bulk-W and bulk-steel. Firstly, thermophysical characterizations were performed on these composites. Secondly, two approaches have been investigated to join bulk-W and 75 vol% W composite: direct joining and using a vanadium foil. Only vanadium foil resulted in successful bond formation at all the three bonding temperatures of 800 °C, 900 °C and 1000 °C. Thirdly, investigation of diffusion bonding parameters (temperature and time) for the joining of 25 vol% W, 50 vol% W, 75 vol% W and bulk-steel were studied and optimum process parameter were identified. Finally, this optimized parameter (1000 °C; 30 min) was employed to manufacture a complete 12 mm x 12 mm W-steel joint consisting of this graded interlayer.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000710727700001
DO  - DOI:10.1016/j.fusengdes.2021.112896
UR  - https://juser.fz-juelich.de/record/901874
ER  -