High Temperature Applications of SiSiC Cellular Ceramics

Abstract

Silicon infiltrated Silicon carbide ceramics are commonly employed because of their excellent chemical, oxidation, and thermal shock resistance. SiÀSiC cellular ceramics with porosity >80% and pore size from 40 to 10 PPI are exploited industrially in applications with high thermal loads, high temperatures, and harsh environments, including porous burners, catalyst supports, heat exchangers, structural ceramic sandwiches, concentrated solar radiation absorbers, and electric heaters. This work attempts to present the components in which SiÀSiC foams are currently applied because of their superior thermo-mechanical properties. 1074 wileyonlinelibrary.com ß

Early-stage oxidation behavior at high temperatures of SiSiC cellular architectures in a porous burner

“…Open-celled cellular ceramics are attractive materials for high temperature applications such as solar receivers, heat exchangers, porous burners and reformers [1][2][3]. Among the potential ceramic materials which can be shaped in a cellular architecture, silicon infiltrated SiC (SiSiC) is particularly interesting due to its outstanding mechanical and thermal properties at high temperatures.…”

“…It has been noted that foams' behavior is strongly affected by the way they interact with the environment during the very initial phases of operation. This is the result of high thermal shocks imposed to the structures during the ignition and the cooling phases of the operation, leading to high thermo-mechanical loads on the struts and the nodes [1]. Moreover, long operating times at high temperatures requires good corrosion resistance.…”

Ablation resistance of precursor derived Si-Hf-C-N(O) ceramics

“…Concomitantly, the design demands the material to possess high strength in addition to low density. Recent studies [2,3] focus on the usage of sandwich structured composites ie., ceramic foam positioned between ceramic matrix composite panels. The ceramic foam which forms the core of the composite must withstand high temperature, mechanical load and thermal shock resistance [4].…”

Synthesis and properties of multiscale porosity TiC-SiC ceramics

“…These strict requirements rule out oxides and suggest silicon carbide (SiC), which is still considered as the reference material for the application. SiCbased honeycombs and foams have the advantage of being commercially available and they have soon been considered for the design of volumetric solar receivers [4,6,7,11,[13][14][15].…”