Abstract SiC reticulated porous ceramics (RPCs), as the key functional components, are widely applied in field of molten-metal filtration. However, the hollow struts with triangular tips caused by burnt out of polymer foam reduced the strength of SiC RPCs, which limited their engineering application. Aiming to reveal the effects of template strut morphology on the mechanical performance of SiC RPCs, templates with triangular, square and circular cross sections were designed by additive manufacturing. Subsequently, SiC RPCs with varied strut structures were prepared by slurry immersion, followed by sintering at elevated temperature. The blunt of template strut improved the mechanical property of SiC RPCs, samples with circular hollow struts showed the highest crushing strength and strain than that of triangular and square hollow struts. From the results of simulation calculation, triangular hollow struts led to the significant stress concentration in the connection of struts and their middle parts, while the smaller stress uniformly distributed in the whole SiC skeleton as hollow struts became circle, thereby the improved mechanical properties were obtained in SiC RPCs.

中文翻译：

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模板支柱形貌对SiC网状多孔陶瓷力学性能的影响

摘要 碳化硅网状多孔陶瓷（RPCs）作为关键的功能部件，广泛应用于熔融金属过滤领域。然而，由于聚合物泡沫烧毁导致的三角形尖端空心支柱降低了碳化硅RPC的强度，从而限制了其工程应用。为了揭示模板支柱形态对 SiC RPC 力学性能的影响，通过增材制造设计了三角形、方形和圆形横截面的模板。随后，通过浆液浸渍和高温烧结制备了具有不同支柱结构的 SiC RPC。模板支柱的钝化改善了 SiC RPC 的力学性能，圆形空心支柱的样品比三角形和方形空心支柱的样品表现出最高的抗压强度和应变。