TY  - JOUR
AU  - Yuan, Y.
AU  - Greuner, H.
AU  - Böswirth, B.
AU  - Linsmeier, Ch.
AU  - Luo, G.-N.
AU  - Fu, B. Q.
AU  - Xu, H. Y.
AU  - Shen, Z. J.
AU  - Liu, W.
TI  - Surface modification of molten W exposed to high heat flux helium neutral beams
JO  - Journal of nuclear materials
VL  - 437
IS  - 1-3
SN  - 0022-3115
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-05165
SP  - 297 - 302
PY  - 2013
AB  - High heat flux tests with central heat flux of 10.5 MW/m2 using helium neutral beams have been carried out on rolled tungsten. The energy of helium particles is 33 keV and the particle flux is 2 × 1021 m−2 s−1. An 80 × 65 × 3 mm3 rolled tungsten plate is firstly exposed to a 4.6 s pulse resulting in partially molten surfaces. Thereafter the tungsten plate is irradiated by several helium pulses with fluences of 1.2–2.5 × 1022/m2 and peak temperatures from 1450 to 2590 °C. The experiments show that: (1) helium-induced surface modification of the resolidified tungsten surface is very different from that of the non-molten surface; (2) the surface morphology of molten surface is closely related to the orientation of the resolidified grain; (3) the evolution of surface modifications, for both of the molten and non-molten tungsten surfaces, indicates a strong dependence on the surface temperature and local helium fluence.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000319172200044
DO  - DOI:10.1016/j.jnucmat.2013.02.043
UR  - https://juser.fz-juelich.de/record/836040
ER  -