Liu Shaojia, Deng Jingjing, Zhao Hewei, Wang Tianbai, Lu Junfeng, Ding Baosen, Guo Tianqi, Ritchie Robert O, Guo Lin
State Key Laboratory of Bioinspired Interfacial Materials Science, Bioinspired Science Innovation center, Hangzhou International Innovation Institute, Beihang University, Hangzhou, China.
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China.
Nat Commun. 2025 Jul 1;16(1):5980. doi: 10.1038/s41467-025-61060-1.
Stiffness-damping balance, high specific mechanical performance, and corrosion resistance are demanded for metals. Here, we developed an enamel-inspired ceramic (EIC) coating strategy involving hydrothermal growth of a tooth enamel-like ZrO₂ nanorods on Zr foil and amorphous ZrO₂ intergranular phase formation via controlled hydrolysis. The EIC coated Zr foil (Zr-EIC) achieved a high viscoelastic figure of merit (4.6 GPa); as well as excellent specific stiffness and hardness owing to the lightweight of ceramics, surpassing the values of Zr and previously reported Zr-based alloys or Zr-based composites. This was due to the vertically oriented stiff nanorods and unique energy dissipation derived from deformation at the crystalline/amorphous interfaces. It demonstrated exceptional NaCl corrosion resistance. This approach showed universality across Ti, Zn, and Cu substrates, enhancing both mechanical properties and corrosion resistance. By constructing an enamel-like hierarchical structure on the metal surface, the strategy overcomes traditional metal limitations without causing an increase in density.
金属需要具备刚度-阻尼平衡、高比机械性能和耐腐蚀性。在此，我们开发了一种受牙釉质启发的陶瓷（EIC）涂层策略，该策略包括在Zr箔上通过水热生长形成牙釉质状的ZrO₂纳米棒，并通过控制水解形成非晶ZrO₂晶界相。涂覆有EIC的Zr箔（Zr-EIC）实现了高粘弹性品质因数（4.6 GPa）；由于陶瓷的轻质特性，其比刚度和硬度也非常出色，超过了Zr以及先前报道的Zr基合金或Zr基复合材料的值。这归因于垂直取向的刚性纳米棒以及在晶体/非晶界面处变形产生的独特能量耗散。它表现出卓越的耐NaCl腐蚀性。这种方法在Ti、Zn和Cu基体上具有通用性，可同时提高机械性能和耐腐蚀性。通过在金属表面构建类似牙釉质的分级结构，该策略克服了传统金属的局限性，且不会导致密度增加。
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