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The Design of Three-Layered Struts to Strengthen SiC Reticulated Porous Ceramics for Porous Media Combustion

The effects of vacuum infiltration and the addition of kyanite in infiltration slurry on the strut structure, mechanical properties and thermal shock resistance of SiC RPCs were investigated. During vacuum infiltration process, the triangular voids within SiC struts were filled up and strut surface was coated by infiltration slurry. After sintering, the multi-layered struts were designed in SiC RPCs, which were characterised as the outer layer of aluminosilicate, middle layer of mullite bonded SiC skeleton and inner layer of mullite-bonded corundum. SiC RPCs with three-layered struts possessed excellent mechanical properties and thermal shock resistance in association with the reaction-boned inner layer and the optimised strut structure.


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