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

最近的研究极大地增加了人们对生物材料的认识和理解，以及它们独特的机械和物理性能是如何从其结构中产生的。新的制造技术使生物材料的改性或基于既定生物学原理的新材料和结构的合成成为可能。其目标是利用现代表面工程技术开发用于抗冲击的坚硬和坚韧的轻质涂层，并开发可膨胀泡沫来制造智能安全气囊，以最大限度地减少装甲后部的钝化创伤。这些系统将与外部具有抗冲击涂层的轻型防弹衣和内部智能安全气囊兼容。这项建议将着眼于两种新颖的仿生策略来适应来自物体、异物和弹道的冲击能量，以提高表面对高应变事件的损伤容忍度：(1)与其基材匹配的硬韧多层CVD涂层，它将通过亚临界纳米/微裂纹扩展和弹性响应来耗散冲击能量；(2)塑性变形和拉伸(负泊松比)泡沫塑料涂层，它在高应变下发泡，充当抗损伤、自我修复和自我保护的双皱折区。能量将通过弹塑性变形和拉伸性能耗散。

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.