Sintering and irradiation of copper-based high entropy alloys for nuclear fusion
authors Dias, M; Antao, F; Catarino, N; Galatanu, A; Galatanu, M; Ferreira, P; Correia, JB; da Silva, RC; Goncalves, AP; Alves, E
nationality International
author keywords High entropy alloys; Microstructure; Irradiation damage; X-ray diffraction
abstract In this study, CuxCrFeTiV (x = 0.21, 0.44, 1 and 1.7 M ratio) high entropy alloys have been devised for thermal barriers between the plasma facing tungsten tiles and the copper-based heat sink in the first wall of nuclear fusion reactors. The high entropy alloys were produced by ball milling the elemental powders, followed by consolidation with spark plasma sintering. Irradiation of the equiatomic CuCrFeTiV sample was carried out at room temperature with Ai(+) (300 keV) beams with a fluence of 3 x 10(20) at/m(2). Structural changes prior and after irradiation were investigated by scanning electron microscopy, coupled with energy dispersive X-ray spectroscopy, X-ray diffraction and thermal diffusivity. Preliminary results showed the presence of heterogenous and multiphasic microstructures in all samples. Moreover, with the increase of the Cu content it is possible to observe the formation of Cu-rich structures. The diffractogram of the CuCrFeTiV sample revealed major peaks of a BCC crystal structure and minor peaks of a FCC crystal structure. In addition, after irradiation no modifications in the CuCrFeTiV microstructure or in the diffractogram were observed.
issn 0920-3796
isbn 1873-7196
year published 2019
volume 146
beginning page 1824
ending page 1828
digital object identifier (doi) 10.1016/j.fusengdes.2019.03.044
web of science category Nuclear Science & Technology
subject category Nuclear Science & Technology
unique article identifier WOS:000488313700093
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