The microstructure is a key factor for the comprehensive performance of carbon foam, especially for mechanical property. SiC nanowires/melamine-based carbon foam composites with a designed controllable double-nest microstructure were fabricated, which was made of a kind of hairy structure consisting of carbon skeleton with SiC nanowires sprouting out from them. This composite was ultralight with a minimum density of 5.56 mg/cm3. It also exhibited a good mechanical property that the compressive strength was improved to 45.67–73.11 kPa for each different microstructure, which is over 3–4.8 times than that of the matrix. This straining process of this designed double-nest microstructure was further investigated, and three mechanical models were built based on the octahedral model for analyzing the compressive process of this composite. By calculating and simulating the proposed model C, we obtained an empirical equation, and it was successfully utilized to calculate the compressive stress of this double-nest microstructure.

中文翻译：

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具有设计的双巢微结构的 SiC-NWs/MCF 复合材料的压缩行为

微观结构是影响碳泡沫综合性能，尤其是力学性能的关键因素。制备了具有可控双巢微结构的碳化硅纳米线/三聚氰胺基碳泡沫复合材料，该复合材料由一种由碳骨架组成的毛状结构构成，碳化硅纳米线从中萌出。这种复合材料是超轻的，最小密度为 5.56 mg/cm3。它还表现出良好的力学性能，每种不同微观结构的抗压强度提高到 45.67-73.11 kPa，是基体的 3-4.8 倍以上。进一步研究了这种设计的双巢微结构的应变过程，并基于八面体模型建立了三个力学模型，用于分析该复合材料的压缩过程。