Inspired by nacre’s design principle, a bottom-up strategy by self-assembly alignment of flake powders, namely flake powder metallurgy, is employed to fabricate bioinspired laminated composites with brick-and-mortar structure. The microscale flake Al₂O₃ powders and flake Al powders with native Al₂O₃ nanolayers are utilized to fabricate the bioinspired hierarchical Al₂O₃/Al laminated composites, and the composites with 5 vol% Al₂O₃ achieves an enhancement of 22% in strength with only a 7% compromise on ductility, leading to a notable improvement in toughness (17%) compared to the corresponding Al matrix. The higher strain hardening due to enhanced dislocation accumulation capacity at hierarchical Al₂O₃/Al interface can delay the occurrence of necking, and the large elongation after peak stress is attributed to multiple extrinsic toughening effect from brick-and-mortar structure. The bottom-up strategy can guide the design and fabrication of advanced bioinspired laminated composites to achieve enhanced mechanical performance.

受珍珠层设计原理的启发，采用了通过自组装对齐薄片状粉末的自下而上的策略，即薄片状粉末冶金，来制造生物启发的砖混结构层压复合材料。利用微米级片状Al ₂ O ₃粉末和具有天然Al ₂ O ₃纳米层的片状Al粉来制备生物启发的分层Al ₂ O ₃ / Al层压复合材料，以及含5 vol％Al ₂ O ₃的复合材料可实现22％的强度提高，而延展性仅降低7％，与相应的Al基体相比，韧性显着提高（17％）。由于分层Al ₂ O ₃ / Al界面处位错累积能力的增强而导致的较高的应变硬化可以延迟颈缩的发生，并且峰值应力后的大伸长率归因于实体结构的多重外在增韧作用。自下而上的策略可以指导先进的生物启发层压复合材料的设计和制造，以实现增强的机械性能。