论文标题

被动膜的生长:Ti和类似金属的证据

The Growth of Passive Membranes: Evidence from Ti and Like Metals

论文作者

Lao, Weiwei, Luo, Qiaojie, Huang, Ying, Zhong, Haixu, Lou, Chaoqian, Deng, Xuliang, Wen, Xiufang, Li, Xiaodong

论文摘要

当前对钝化的矛盾理解来自过度复杂的被动模型,缺陷的表征和错位的理论方法。从全新的实验中,我们发现Ti被动膜具有空间序列的宏观结构。一开始,立即形成热力学稳定的化学吸附的Ti-O单层,以使大多数Ti原子失活,并在金属基质上进行环境氧的直接反应,然后在TiOX@Ti Ceramet类似非平衡梯度层下方的下方迅速形成。这两层通过非线性氧化阻尼的非线性机理缓慢生长,以协同作用,以使宏观排序的被动膜生长缓慢生长,从而产生钝化。这些发现反驳了“钝化的吸附理论”和“被动膜理论”,并告知我们称为“增量氧化阻尼的钝化理论”的新理论。

Current contradictory understanding of passivation comes from overly-complex passive models, defective characterization and misplaced theoretical approaches. From brand-new experimentation, we find that a Ti passive membrane has spatiotemporally-ordered macrostructure. At the start, a thermodynamically-stable chemisorbed Ti-O monolayer is immediately formed to inactivate the outmost Ti atoms and shield direct reaction of environmental oxygens on metallic matrix, and then an underneath TiOx@Ti ceramet-like non-equilibrium gradient oxide layer rapidly forms. The two layers work synergistically to keep the macro-ordered passive membrane growing slowly via non-linear mechanism of incremental oxidation damping, thus effecting passivation. These findings disprove "the adsorption theory of passivation" and "the theory of passivity film" and inform a new theory we call "passivation theory of incremental oxidation damping".

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