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SiC/MoSi2 based coatings for Cf/C composites by two step pack cementation

TitoloSiC/MoSi2 based coatings for Cf/C composites by two step pack cementation
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2019
AutoriBezzi, Federica, Burgio F., Fabbri Paride, Grilli Selene, Magnani G., Salernitano E., and Scafè Matteo
RivistaJournal of the European Ceramic Society
Parole chiaveCarbon carbon composites, Cementing (shafts), Chemical Vapour Infiltration, Coatings, Molybdenum, Molybdenum compounds, Molybdenum disilicide, MoSi2, Multi-layer-coating, oxidation, Oxidation resistance, Pack cementation, Pack cementation coatings, Passive oxidation, Silica, Silicon carbide, Silicon oxides, Thermoanalysis, Treatment conditions

In order to improve the oxidation resistance of Cf/Cs produced by chemical vapour infiltration, a multilayer coating based on silicon carbide and molybdenum disilicide was produced by two-step pack cementation technique. The inner SiC layer with a thickness up to 25 μm was obtained without promoted reaction additives by varying the composition, and thermal treatment conditions. The SiC/SiC-MoSi2 coating was produced with a thickness up to 80 μm by two step pack cementation, considering the effect of the inner layer characteristic. The enhancement of the oxidation resistance, observed in SiC/SiC-MoSi2 coated Cf/Cs by means of thermal analysis in flowing air up to 1500°C, was due to the formation of SiO2 promoted by the passive oxidation of silicon carbide and molybdenum disilicide. © 2018 Elsevier Ltd


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Citation KeyBezzi201979