Impact and erosion resistant coatings - double auto-expanding polymer foam and hybrid CVD/PVD laminated hierarchical multilayered approaches

最近的研究大大增加了对生物材料的认识和理解，以及它们独特的机械和物理特性是如何从它们的结构中产生的。新的制造技术已经允许修改生物材料或合成基于既定生物学原理的新材料和结构。其目的是利用现代表面工程技术开发坚硬的轻质涂层，以抵抗冲击，并开发可膨胀泡沫，以制造智能安全气囊，以最大限度地减少装甲后面的钝性创伤。这些系统将兼容轻型防弹衣，外部有抗冲击涂层，内部有智能安全气囊。该提案将着眼于两种新颖的仿生策略，以适应来自侵蚀物、异物和弹道的冲击能量，以增强表面对高应变事件的损伤容限：(1)坚硬而坚韧的多层CVD涂层与其基材相匹配，通过亚临界纳米/微裂纹扩展和弹性响应来消散冲击能量；(2)在高应变下产生泡沫的塑性变形和形变（负泊松比）泡沫基涂料，作为双皱区，具有抗损伤和自我修复和自我保护作用。能量将通过弹塑性变形和塑性性能耗散。

Recent research has greatly increased the knowledge and understanding of biological materials and how their unique mechanical and physical properties arise from their structures. New fabrication techniques have allowed the modification of biological materials or the synthesis of novel materials and structures that are based on established biological principles. The aim is to use modern surface engineering techniques to develop hard and tough lightweight coatings for impact resistance and develop expandable foam to create intelligent airbags to minimise behind armour blunt trauma. These systems would be compatible lightweight body armour with impact resistant coating externally and intelligent airbags internally. This propsal will look at two novel and biomimetically inspired strategies to accommodate impact energies from erodents, foreign objects and ballistics to enhance damage tolerance of surfaces to high strain events: (1) hard and tough multi-layered CVD based coatings matched to their substrates that will dissipate impact energy through sub-critical nano/micro crack propagation and elastic responses; (2) plastically deforming and auxetic (negative Poisson's ratio) foam based coatings that foam under high-strain to act as a double crumple zone for damage resistance and self-repair and self-protection. Energy would be dissipated via elastic and plastic deformation and auxetic performance.