Stability of SiC/SiC fibre composites exposed to Li4SiO4 and Li2TiO3 in fusion relevant conditions

The physico-chemical stability of a commercial 3D SiCf/SiC composite provided with an outer CVD SiC protective layer was studied after exposure to flowing helium with 0.1% H2 at 800DGC in contact with lithium silicate and lithium titanate. Exposure tests were carried out for 216, 1000 and 10 000 h i...

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Published inJournal of nuclear materials Vol. 294; no. 3; pp. 223 - 231
Main Authors LA BARBERA, A, RICCARDI, B, DONATO, A, NANNETTI, C. A, MORESCHI, L. F
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier 01.04.2001
Subjects
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Installations for energy generation and conversion: thermal and electrical energy
Lithium silicate
Stability
Fiber reinforced material
Mechanical properties
Composite material
Non oxide ceramics
Structural ceramic
Nuclear reactor
Nuclear fusion reactor
Blanket
Silicon carbide
Lithium Titanates
Pebble bed
Microstructure
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Summary:The physico-chemical stability of a commercial 3D SiCf/SiC composite provided with an outer CVD SiC protective layer was studied after exposure to flowing helium with 0.1% H2 at 800DGC in contact with lithium silicate and lithium titanate. Exposure tests were carried out for 216, 1000 and 10 000 h in an especially designed loop. The mechanical characteristics of the SiCf/SiC composite in contact with Li4SiO4 were almost unaffected by the exposure, while those in contact with Li2TiO3 were slightly worsened. SiC coating transformation was clearly detected on samples exposed to both lithium silicate and titanate.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(01)00487-1