具有增强机械性能的墨鱼骨结构类层状多孔纤维基陶瓷,ACS Applied Materials & Interfaces

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具有增强机械性能的墨鱼骨结构类层状多孔纤维基陶瓷
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-03-06 , DOI: 10.1021/acsami.2c23257
Xueying Zhang ₁ , Anran Guo ₁ , Xiaohui Ma ₁ , Haiyan Du ₁ , Liwen Yan ₁ , Feng Hou ₁ , Jiachen Liu ₁

Affiliation

多孔纤维基陶瓷以其优异的隔热性能和高热稳定性能在各个领域得到广泛应用。然而，设计具有更高综合性能的多孔纤维陶瓷，如低密度、低导热性、室温和高温下的高机械性能，仍然是一个挑战和未来的发展趋势。因此，基于具有优异机械性能的“壁隔”结构的轻质墨鱼骨，我们通过定向冷冻铸造法和系统地设计和制造了具有独特的基于纤维的薄片双结构的新型多孔纤维陶瓷。研究层状组分对产品微观结构和机械性能的影响。X - Z平面。与文献报道的传统多孔纤维材料相比，层状组分中Al ₂ O ₃ /SiO ₂摩尔比为1:2的CLPFCs表现出突出的综合性能，如低密度、优异的隔热性能和出色的机械性能在室温和高温（1300 °C 时为 3.46 MPa）下的性能，表明 CLPFC 是高温隔热系统应用的有前途的候选者。

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Cuttlefish-Bone-Structure-like Lamellar Porous Fiber-Based Ceramics with Enhanced Mechanical Performances

Porous fiber-based ceramics have been widely applied in various fields because of their excellent thermal insulation property and high thermal stability property. However, designing porous fibrous ceramics with enhanced comprehensive performances, such as low density, low thermal conductivity, and high mechanical properties at both room temperature and high temperature, is still a challenge and the future development trend. Hence, based on the lightweight cuttlefish bone that possesses a “wall-septa” structure with excellent mechanical performance, we design and fabricate a novel porous fibrous ceramic with the unique fiber-based dual structure of lamellas by the directional freeze-casting method and systematically investigate the effects of lamellar components on the microstructure and mechanical performances of the product. For the desired cuttlefish-bone-structure-like lamellar porous fiber-based ceramics (CLPFCs), the porous framework formed by the overlapping of transversely arranged fibers helps to reduce the density and thermal conductivity of the product, and the longitudinally arranged lamellar structure replaces traditional binders and plays an important role in improving the mechanical properties in the direction parallel to the X–Z plane. Compared with traditional porous fibrous materials reported in the literature, the CLPFCs with an Al₂O₃/SiO₂ molar ratio of 1:2 in the lamellar component exhibits prominent comprehensive performances, such as low density, excellent thermal insulation property, and outstanding mechanical performances at both room temperature and high temperature (3.46 MPa at 1300 °C), indicating that the CLPFCs are a promising candidate for applications in high-temperature thermal insulation systems.

更新日期：2023-03-06

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