Oxidation Behavior at 1600°C of Si-SiC-ZrB2 Composites Produced by Si Reactive Infiltration

D'Amico, Giuseppe Claudio and Ortona, Alberto and Biamino, Sara and Fino, Paolo and Badini, Claudio and D'Angelo, Claudio (2014) Oxidation Behavior at 1600°C of Si-SiC-ZrB2 Composites Produced by Si Reactive Infiltration. Advanced Engineering Materials, 16 (2). pp. 176-183. ISSN 1527-2648

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Abstract

Si–SiC–ZrB2 are produced by the reactive infiltration with molten silicon in porous SiC–C–ZrB2 preforms. It is observed that oxidized Si–SiC–ZrB2 ceramics present a layered structure composed of an outer layer of silica and a borosilicate glass intermediate layer with ZrO2 particles and the unoxidized bulk material. The graphs show that the passivation is very effective already after 5 min of oxidation. The thermograms do not vary significantly when the oxidation times are increased.

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