Nacre's multiscale reinforcing mechanisms provide lessons for the design and fabrication of high-performance engineering composites. In this study, the addition of hierarchically aligned flake Al₂O₃ and reduced Graphene Oxide (rGO) nanosheets into Al matrix constitute the bioinspired multiscale Al₂O₃-rGO/Al laminated composite via flake powder metallurgy. The results show that multiscale Al₂O₃-rGO reinforcements have the synergistic strengthening effect of 1 + 1>2. Extra strengthening mechanism is attributed to enhanced load transfer due to good bonding at Al₂O₃/rGO/Al interface. Compared to Al₂O₃/Al composite, the uniform elongation of Al₂O₃-rGO/Al laminated composite doesn't decrease due to the higher strain hardening capacity. The work presented here provides a new strategy for developing advanced composites with simultaneous enhancement of the modulus-strength-ductility.

Nacre的多尺度增强机制为高性能工程复合材料的设计和制造提供了经验教训。在这项研究中，将分层排列的片状Al ₂ O ₃和还原的氧化石墨烯（rGO）纳米片添加到Al基质中，通过片状粉末冶金技术获得了生物启发的多尺度Al ₂ O ₃ -rGO / Al层压复合材料。结果表明，多尺度Al ₂ O ₃ -rGO增强材料具有1 +1> 2的协同增强作用。由于在Al ₂ O ₃ / rGO / Al界面处的良好粘结，增强了载荷传递，从而获得了额外的强化机制。与Al ₂ O相比₃ / Al复合材料，由于较高的应变硬化能力，Al ₂ O ₃ -rGO / Al层压复合材料的均匀伸长率不会降低。本文介绍的工作为开发高级复合材料同时增强模量-强度-延展性提供了新的策略。