Mechanical properties and oxidation behavior of silicon carbide-molybdenum silicides composites

TitleMechanical properties and oxidation behavior of silicon carbide-molybdenum silicides composites
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2013
AuthorsMagnani, G., Brentari A., Burresi Emiliano, and Coglitore A.
JournalCeramics International
Volume39
Pagination3345-3351
ISSN02728842
KeywordsD. SiC, High density, High temperature, Infiltrated composite, Mechanical properties, Melt infiltration, Molybdenum, oxidation, Oxidation behaviors, Preforming, SiC/MoSi, Silicides, Silicon carbide, Weight ratios
Abstract

SiCMoSi2 porous preforms with different SiC/MoSi2 weight ratios were densified by means of the melt infiltration method. Mixture of SiC-MoSi2Mo≤5Si3C≤1 was used as infiltrant. The resultant infiltrated composites showed high density, good mechanical properties and oxidation resistance. In particular, fracture toughness determined at 1773 K was 6.80 MPa m1/2 and 6.28 MPa m 1/2 with SMI-80 (preform with SiC/MoSi2 weight ratio 80/20) and SMI-50 (preform with SiC/MoSi2 weight ratio 50/50) composites, respectively. The same composites showed high temperature (1773 K) flexural strength values: 214 MPa (SMI-80) and 242 MPa (SMI-50). Long term oxidation behavior was also tested at 1773 K and results confirmed the refractoriness of these materials. © 2012 Elsevier Ltd and Techna Group S.r.l.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84872982473&doi=10.1016%2fj.ceramint.2012.10.024&partnerID=40&md5=da65d844cc06b2ee0f1b879cc742acaf
DOI10.1016/j.ceramint.2012.10.024