Influence of high flux hydrogen-plasma exposure on the thermal shock induced crack formation in tungsten

TitleInfluence of high flux hydrogen-plasma exposure on the thermal shock induced crack formation in tungsten
Publication TypeJournal Article
Year of Publication2012
AuthorsM. Wirtz, J. Linke, G. Pintsuk, J. Rapp, G.M Wright
JournalJournal of Nuclear Materials
Volume420
Issue1-3
Pagination218-221
Date PublishedJan
Type of ArticleArticle
ISBN Number0022-3115
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. (C) 2011 Elsevier B.V. All rights reserved.

DOI10.1016/j.jnucmat.2011.09.035
Division

PSI

Department

PSI-E

PID

b24deb07eafa8cea07186a942f3feeb0

Alternate TitleJ. Nucl. Mater.

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