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One of the critical areas in fusion reactor technology is the interface between the plasma and the wall material. The graphite tiles proposed for protecting the vacuum vessel from plasma interaction cannot be actively cooled. The adaption of coatings on the first wall acting as selective absorbers of the energy radiating from the graphite tiles at a temperature range of 1000-2000 C increases the heat and reduces the tile surface temperatures. Considering the operational environment, Cr(2)O(3), MnO(2), TiO(2) and Al(2)O(3) have been proposed as absorbing coatings for their thermal and chemical stability. Coatings have been produced by galvanic, APS and VPS techniques. The effects of structure, chemical composition and surface morphology on emissivity at different wavelengths have been checked.

Additional information

Authors: BROSSA F, JRC Ispra (IT);LOOMAN B, JRC Ispra (IT);QUATAERT D, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 7th CIMTEC World Ceramics Congress, Montecatini Terme (IT), June 27-30, 1990
Availability: Available from (1) as Paper EN 35391 ORA
Record Number: 199111247 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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