Title | Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma |
Publication Type | Journal Article |
Year of Publication | 2015 |
Authors | H.Y. Xu, G. De Temmerman, G.N Luo, Y.Z Jia, Y. Yuan, B.Q Fu, A. Godfrey, W. Liu |
Journal | Journal of Nuclear Materials |
Volume | 463 |
Issue | Aug |
Pagination | 308 - 311 |
Abstract | Surface topography of polycrystalline tungsten (W) have been examined after exposure to a low-energy (38 eV/D), high-flux (∼1.1–1.5 × 1024 m−2 s−1) deuterium plasma in the Pilot-PSI linear plasma device. The methods used were scanning electron microscopy (SEM), transmission electron microscopy (TEM), positron annihilation Doppler broadening (PADB) and grazing incident X-ray diffraction (GI-XRD). After exposure to high flux D plasma, blisters and nanostructures are formed on the W surface. Generation of defects was evidenced by PADB, while high stress and mixture of phases were detected in depth of 50 nm by GI-XRD. TEM observation revealed fluctuations and disordered microstructure on the outmost surface layer. Based on these results, surface reconstruction is considered as a possible mechanism for the formation of defects and nanostructures. |
DOI | 10.1016/j.jnucmat.2014.11.039 |
Division | PSI |
Department | PSI-E |
PID | 96cfba8d81e072fe50b88e3d14b37885 |
Alternate Title | J. Nucl. Mater. |
Go back one page.