High strength and high toughness are usually mutually exclusive in materials. Among all material classes, ceramics exhibit a high stiffness and strength, but they present a limited plastic deformation, which results in a moderate toughness. However, tough ceramics have been obtained using anisotropic particles organized in a 'brick and mortar' microstructure, inspired by the structure of the natural nacre. Here, we propose to build nacre-like ceramic composites from colloidal suspensions using heteroaggregation of particles. Two different shaping processes are used: direct settling of suspensions or freeze-granulation. After sintering, in both cases, the platelets alignment is very good, close to that of platelets in natural nacre, with a slightly better one noted for direct settling. Despite a better platelet alignment, the toughness is lower than in previous studies showing that further improvement of the interfacial phases present in the material must now be considered to reinforce its mechanical behavior.

高强度和高韧性通常是材料相互排斥的。在所有材料类别中，陶瓷具有较高的刚度和强度，但它们的塑性变形有限，从而具有中等的韧性。然而，受自然珍珠层结构的启发，使用以“砖和砂浆”微结构组织的各向异性颗粒获得了坚韧的陶瓷。在这里，我们建议使用颗粒的异质聚集体从胶体悬浮液中构建珍珠质状陶瓷复合材料。使用两种不同的成型工艺：直接沉降悬浮液或冷冻制粒。在两种情况下，烧结后的血小板排列都非常好，接近天然珍珠质中的血小板排列，直接沉降时要好一些。尽管血小板排列更好，