Self-adaptive root-like capillary diffusion channels enabled by TaN/Zr3N4 nanomultilayered architecture: Achieving superior corrosion resistance
Self-adaptive root-like capillary diffusion channels enabled by TaN/Zr3N4 nanomultilayered architecture: Achieving superior corrosion resistance
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TaN/Zr3N4 纳米多层结构实现自适应根状毛细管扩散通道：实现卓越的耐腐蚀性
DOI：
10.1016/j.matdes.2022.111555
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发表时间：
2023-01
影响因子：
8.4
通讯作者：
M. Wen
中科院分区：
文献类型：
--
作者：
J.L. Qi;L.P. Wang;J. Hao;Y. Zhang;X.J. He;H.P. Pang;K. Zhang;M. Wen
The combined merits of high hardness and superior chemical inertness enable transition metal nitrides (TMNs) to be extensively coated onto the metal surfaces for avoiding erosion and corrosion attacks. However, the relatively large-size through-type diffusion channels commonly appear in the corroded layers as TMNs coatings subjected to corrosive environments. These channels can serve as short-circuit-diffusion paths for corrosive ions and worsen the corrosion-resistance ability, eventually, yielding unpredictable failure due to the heterogeneous growth of corrosion products. Obviously, comparing with the large-size through-type diffusion channels, the biomimetic multi-forked root-like capillary channels can significantly extend the diffusion distance and retard the transportation of corrosive ions by continuously deflecting and refining the diffusion paths. Herein, the nano-laminated TaN/Zr3N4architecture, consisting of alternating 10 nm-thickness c-TaN nanolayers and 2 nm-thicknessN-rich o-Zr3N4nanolayers, has been fabricated by magnetron sputtering technology; it exhibits the characteristic of c-TaN/c-Zr3N4local coherent growth. Such TaN/Zr3N4nanomultilayered structure contributes to the self-adaptive assembly of TaO2@ZrO2core–shell nanostructure in the corroded layer, thereby yielding appearance of uniformly root-like capillary diffusion channels instead of the typical through-type diffusion channels in the constitute monolayers; finally, it achieves superior corrosion-resistance with homogeneously general corrosion rate and avoids the uncontrollable failures.
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