This experimental study investigates low power (3 W) laser ignition and the subsequent burning characteristics of consolidated $\mathrm{Al}/{\mathrm{Cu}}_x\mathrm{O}$ nanoparticle pellets and loose nanolaminate flakes. The effects of laser absorption, packing density (bulk porosity), and material properties on ignition are quantified, while simplified numerical models are used to examine their predominance. It is found that ignition of consolidated Al/CuO pellets is controlled by their effective thermal conductivity, such that ignition delay (approximately 1 to 100 ms) is minimized in the most porous specimen. However, the burning rate of these pellets is a compromise between the availability of reactive interfaces and the porosity allowing for gas expansion. On the other hand, ignition of loose $\mathrm{Al}/{\mathrm{Cu}}_2\mathrm{O}$ nanolaminate flakes is predominately controlled by power absorption in the laser irradiated layer made of Al or ${\mathrm{Cu}}_2\mathrm{O}$, especially when the thickness of the ${\mathrm{Cu}}_2\mathrm{O}$ layer is smaller than 60 nm. Ignition delay (approximately 0.1 to 1 ms) is tunable by adjusting the thickness of the top ${\mathrm{Cu}}_2\mathrm{O}$ layer, which absorbs more radiation compared to a top Al layer. Moreover, the burning rate of the nanolaminate samples is a compromise between the layer thickness for power absorption and the equivalence ratio that controls the extent of $\mathrm{Al}/{\mathrm{Cu}}_x\mathrm{O}$ reactions.

本实验研究了低功率 (3 W) 激光点火和固结材料的后续燃烧特性。 $铝/{铜}_X\mathrm{哦}$纳米颗粒颗粒和松散的纳米层压薄片。激光吸收、堆积密度（体积孔隙率）和材料特性对点火的影响被量化，同时使用简化的数值模型来检查它们的优势。结果表明，固结的 Al/CuO 颗粒的点火受其有效热导率控制，因此在多孔样品中点火延迟（大约 1 到 100 毫秒）被最小化。然而，这些颗粒的燃烧速度是反应界面的可用性和允许气体膨胀的孔隙率之间的折衷。另一方面，点火松散$铝/{铜}_2\mathrm{哦}$ 纳米层压薄片主要受由铝或铝制成的激光照射层中的功率吸收控制 ${铜}_2\mathrm{哦}$，特别是当厚度 ${铜}_2\mathrm{哦}$层小于 60 nm。点火延迟（大约 0.1 到 1 ms）可通过调整顶部的厚度来调节${铜}_2\mathrm{哦}$层，与顶部铝层相比，它吸收更多的辐射。此外，纳米层压板样品的燃烧速率是功率吸收层厚度和控制燃烧程度的当量比之间的折衷。$铝/{铜}_X\mathrm{哦}$ 反应。