Nanoporous coppers (NPCs) with ligament size down to 800 nm and relative densities ranging from 15.7% to 47.5% were synthesized by vapor phase dealloying (VPD) Cu₃₃Zn₆₇, Cu₁₆Zn_84, and Cu₆Zn₉₄ precursor alloys. The ligament size of NPCs could be adjusted by applying different VPD temperatures under high vacuum, while the change in the mechanical properties of NPCs were monitored by compression tests. Although NPCs possessed a random ligament structure, the energy absorption capability of NPCs was up to 183.3 MJ/m³, which is an order higher than that of other Cu foam structures fabricated by different methods such as 3D printing, electron beam melting, electro-deposition, chemical dealloying and friction powder compaction. High apparent relative density and ligament connectivity could effectively transmit the compression energy in the form of stress waves, and therefore had higher densification strain and better energy absorption capacity. With the use of corrected Gibson and Ashby scaling equation, the ligament strength of NPC was up to 3456 MPa, which was ten times higher than that of bulk Cu and comparable to that of other ordered or periodic copper foams.

通过气相脱合金 (VPD) Cu ₃₃ Zn ₆₇、Cu ₁₆ Zn ₈₄和 Cu ₆ Zn ₉₄前驱体合金合成了韧带尺寸低至 800 nm 且相对密度范围为 15.7% 至 47.5% 的纳米多孔铜 (NPC)。NPC的韧带大小可以通过在高真空下施加不同的VPD温度来调节，而NPC的力学性能的变化是通过压缩试验来监测的。虽然NPCs具有随机​​韧带结构，但NPCs的能量吸收能力高达183.3 MJ/m ³，这比通过3D打印、电子束熔化、电沉积、化学脱合金和摩擦粉末压制等不同方法制造的其他Cu泡沫结构高一个数量级。较高的表观相对密度和韧带的连通性可以有效地以应力波的形式传递压缩能量，因此具有更高的致密化应变和更好的能量吸收能力。使用修正的 Gibson 和 Ashby 比例方程，NPC 的韧带强度高达 3456 MPa，是块状铜的 10 倍，与其他有序或周期性泡沫铜相当。