Routine high strain rate impacts from the surrounding environment can cause surface erosion, abrasion, and even catastrophic failure to many structural materials. It is thus highly desirable to develop lightweight, thin, and tough impact resistant coatings. Here, inspired by the structurally robust impact surface of the dactyl club of the peacock mantis shrimp, a silicon carbide and chitosan nanocomposite coating is developed to evaluate its impact resistance as a function of particle loading. High strain rate impact tests demonstrate that coatings with 50% and 60% SiC have optimal performance with the greatest reduction in penetration depth and damage area to the substrate. Post‐impact analysis confirms that these concentrations achieve a balance between stiffness and matrix phase continuity, efficiently dissipating impact energy while maintaining coating integrity. The addition of SiC particles helps dissipate impact energy via interphase effects, particle percolation, and frictional losses due to particle jamming. The formation of these stress paths is also modeled to better understand how the addition of particles improves coating stiffness and the stress distribution as a function of particle loading. These findings highlight the potential of bioinspired materials and their promise to promote innovation and breakthroughs in the development of resilient multifunctional materials.

中文翻译：

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仿生 SiC/壳聚糖抗冲击涂料


来自周围环境的常规高应变率冲击会导致许多结构材料表面侵蚀、磨损，甚至灾难性失效。因此，开发轻质、薄且坚韧的抗冲击涂层是非常可取的。在这里，受到孔雀螳螂虾 dactyl club 结构坚固的冲击表面的启发，开发了一种碳化硅和壳聚糖纳米复合涂层，以评估其抗冲击性与颗粒负载的关系。高应变率冲击测试表明，使用 50% 和 60% SiC 的涂层具有最佳性能，对基材的穿透深度和损伤面积的减少最大。冲击后分析证实，这些浓度在刚度和基体相连续性之间实现了平衡，在保持涂层完整性的同时有效地消散了冲击能量。SiC 颗粒的添加有助于通过相间效应、颗粒渗流和颗粒干扰引起的摩擦损失来耗散冲击能量。还对这些应力路径的形成进行了建模，以更好地了解颗粒的添加如何提高涂层刚度和应力分布作为颗粒载荷的函数。这些发现突出了仿生材料的潜力及其促进弹性多功能材料开发的创新和突破的承诺。