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Abstract

Coatings of Al - Si, SAP (sintered aluminium powder), Al-2O-3, TiC (low-Z material) and Ta have been developed for in-vessel component protection. Anodic oxidation, vapour depositions, reactive sputtering, chemical vapour deposition (CVD) and plasma spray have been the coating formation methods studied. AISI 316, 310, 304, Inconel 600 and Mo were adopted as base materials. The coatings were characterized in terms of composition, structure and connection with the supporting material. The behavior of coatings under H+, D+ and He+ irradiation in the energy range 100 eV - 8 KeV was tested and compared to the solid massive samples. TiC and Ta coatings were tested with thermal shocks. Temperature dependence of the erosion of TiC was also studied. TiC coatings have low sputtering values, good resistance to arcing and a high chemical stability. TiC and Ta, CVD and plasma spray coatings are thermal shock resistant. High thermal loads produce cracks but no spalling. Destruction occurred only after melting of the base material. The plasma spray coating method seems to be most appropriate for developing remote handling applications in fusion devices.

Additional information

Authors: BROSSA F JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: NUCLEAR ENGINEERING AND DESIGN/FUSION, VOL. 1 (1984), NO. 2, PP. 231-240
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