NDLI: Development of tungsten coatings for ITER divertor components

Content Provider	IEEE Xplore Digital Library
Author	Riccardi, B. Pizzuto, A. Bertamini, L. Diotalevi, M. Vieider, G.
Copyright Year	1998
Description	Author affiliation: Assoc. EURATOM-ENEA sulla Fusione, Frascati, Italy (Riccardi, B.)
Abstract	The EU design of the ITER Divertor Wing envisages the use of tungsten as an armour because of its low sputter rate. To guarantee an adequate armour lifetime a minimum thickness of 5 mm is required. A promising technology to apply W as an armour for extended surfaces is the plasma spray process (PS). Aim of the activity was qualifying a PS able to realise up to 5 mm thick W coating on Copper Chromium Zirconium (CuCrZr) tube substrate (Dout=50 mm, Din=40 mm and length=150 mm) to be tested with respect to thermal fatigue under high heat flux. Several samples were manufactured, and in particular: many flat samples for selection of the spraying parameters; four tubular samples 50 mm long with W coating thickness of 4 mm; two tubular mock ups 150 mm long with coating thickness of 3 and 5 mm. Thermal fatigue tests were performed at the electron beam facility FE200 (Le Creusot-France). The mock up with 5 mm thick W coating realised with the low pressure plasma spray technique survived without any damage 1000 cycles at 2 MW/m/sup 2/ and 200 cycles at 4 MW/m/sup 2/.
Starting Page	910
Ending Page	913
File Size	507315
Page Count	4
File Format	PDF
ISBN	0780342267
DOI	10.1109/FUSION.1997.687772
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tungsten Coatings Thermal spraying Testing Fatigue Copper Chromium Zirconium Manufacturing Uninterruptible power systems
Content Type	Text
Resource Type	Article

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