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

Yawei Li1, Xiong Liang2, Yawei Li2

1 National-Provincial Joint Engineering, Research Center of High Temperature, Materials and Lining Technology, Wuhan 430081/China
2 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 43008/China

Revision 28.05.2018, 28.09.2018

Volume 11, Issue 1, Pages 77 - 81

Abstract

Silicon Carbide Reticulated Porous Ceramics (SiC RPCs) with multi-layered struts were designed via polymer sponge replica technique together with vacuum infiltration of alumina slurry containing kyanite. 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.

Keywords

SiC reticulated porous ceramics, three-layered strut, mechanical properties, thermal shock resistance

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