Biomimetic synthesis of cellular SiC based ceramics from plant precursor

[摘要] A novel biomimetic approach in designing and fabricating engineering ceramic materials has gained much interest in recent times. Following this approach, synthesis has been made of dense Siâ€�?�SiC duplex ceramic composites and highly porous SiC ceramics in the image of the morphological features inherent in the caudex stem of a local monocotyledonous plant. The process route involves making of a carbonaceous biopreform and its subsequent reaction with an infiltrating silicon melt to yield the biomorphic Siâ€�?�SiC ceramic composites with flexural strength and Young’s modulus of 264 MPa and 247 Gpa, respectively and loss in weight of only ∼ 9% during oxidative heating up to 1200°C in flowing air.

[学科分类] 材料工程

[关键词] Biomimetic synthesis;carbonaceous biopreform;biomorphic Siâ€�?�SiC ceramic composites;porous cellular SiC ceramics.