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

TitleSiC/MoSi2 based coatings for Cf/C composites by two step pack cementation
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2019
AuthorsBezzi, Federica, Burgio F., Fabbri Paride, Grilli Selene, Magnani G., Salernitano E., and Scafè Matteo
JournalJournal of the European Ceramic Society
Volume39
Pagination79-84
ISSN09552219
KeywordsCarbon 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
Abstract

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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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85041597855&doi=10.1016%2fj.jeurceramsoc.2018.01.024&partnerID=40&md5=ea7b58efbcb1b78c1dbc83dbf4121d53
DOI10.1016/j.jeurceramsoc.2018.01.024
Citation KeyBezzi201979