Abstract
The influence of high flux hydrogen-plasma on the thermal shock behaviour of tungsten was investigated in a combined experiment using the linear plasma device Pilot-PSI and the electron beam facility JUDITH 1. Tungsten targets were exposed to high flux hydrogen plasma, cyclic thermal shock tests and a combination of both loading conditions. The induced thermal shock crack networks and surface modifications were investigated and characterised using scanning electron microscopy (SEM), optical microscopy and laser profilometry. Comparisons of the results showed that the combination of hydrogen plasma and thermal shock loading has a significant influence on the crack pattern in terms of crack distance, width and depth. Furthermore the sequence of the different loading types is of importance. Due to the prior loading with hydrogen plasma the thermal shock cracks were not limited to the electron beam loaded area but propagated through the just plasma loaded area and even through the unexposed area at the edges of the tungsten target.
| Original language | English |
|---|---|
| Pages (from-to) | 218-221 |
| Number of pages | 4 |
| Journal | Journal of Nuclear Materials |
| Volume | 420 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Jan 2012 |
| Externally published | Yes |
Funding
We would like to acknowledge Dr. C. Thomser and Th. W. Loewenhoff for their useful advices and Dr. E. Wessel for his support with SEM images. This work, supported by the European Communities under the contract of Association between EURATOM/Forschungszentrum Jülich, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
| Funders | Funder number |
|---|---|
| Forschungszentrum | |
| H2020 Euratom |